Certified Maintenance & Reliability Technician (CMRT) Exam — Questions and Answers

Question 1: An infrared thermography scan reveals a hot spot on a three-phase motor control panel. What is the most appropriate next action?

Apply more lubricant to the connection
Immediately shut down the panel
Document the finding and schedule corrective maintenance based on severity (Correct answer)
Increase the cooling airflow to the panel

Correct answer: Document the finding and schedule corrective maintenance based on severity

Thermography findings should be documented with severity classification, then corrective action should be scheduled based on risk before the fault progresses to failure.

Question 2: Which lubricant oil analysis test is most directly used to detect ferrous wear particles from gear or bearing surfaces?

Ferrography or particle count (Correct answer)
Flash point test
Viscosity measurement
Total acid number (TAN)

Correct answer: Ferrography or particle count

Ferrography and particle count tests quantify wear metal particles in the oil, directly indicating the rate of metallic component wear.

Question 3: What does the ISO cleanliness code (e.g., ISO 16/14/11) measure in oil analysis?

The percentage of water contamination in the oil
The number of particles per milliliter at three different size thresholds (Correct answer)
The oxidation stability rating of the lubricant
The concentration of additive packages in the lubricant

Correct answer: The number of particles per milliliter at three different size thresholds

The ISO 4406 cleanliness code reports particle counts per milliliter at three size thresholds (4µm, 6µm, and 14µm), with each number representing a range of particle concentrations.

Question 4: What is a key concept in preventive and predictive maintenance?

Waiting for breakdowns
Routine checks and early detection (Correct answer)
Delaying inspections
Ignoring small issues

Correct answer: Routine checks and early detection

A key concept in preventive and predictive maintenance is the implementation of routine checks and early detection of potential issues. Instead of waiting for equipment to fail, these strategies involve scheduled inspections and condition monitoring to identify wear or impending problems. Addressing these issues proactively prevents costly breakdowns and extends asset life.

Question 5: A technician is preparing for a welding task on a permanently installed steel pipe rack in a workshop. According to hot work safety procedures, which of the following conditions is a mandatory prerequisite before a hot work permit can be issued?

A fire extinguisher is available within 50 feet.
All combustible materials have been removed or shielded within a 35-foot radius. (Correct answer)
The area's ventilation system has been temporarily disabled.
The technician has completed general safety orientation.

Correct answer: All combustible materials have been removed or shielded within a 35-foot radius.

NFPA and OSHA guidelines require that before hot work begins, a thorough inspection must ensure that all flammable and combustible materials are removed from the vicinity. A common requirement is to clear a 35-foot radius around the work area or protect any materials that cannot be moved with fire-resistant shields. While having a fire extinguisher nearby is required, the primary action is to remove the fuel sources first.

Question 6: What is a key concept in troubleshooting and analysis?

Ignoring small issues
Routine checks and early detection (Correct answer)
Delaying inspections
Waiting for breakdowns

Correct answer: Routine checks and early detection

In troubleshooting and analysis, routine checks and early detection are crucial for identifying the root cause of problems efficiently. By regularly monitoring system performance and detecting anomalies early, technicians can pinpoint issues before they become complex failures. This proactive approach streamlines the diagnostic process, reduces repair time, and prevents recurrence.

Question 7: A 'Dielectric Absorption Ratio' (DAR) in insulation resistance testing is calculated as the ratio of the 60-second reading to the 30-second reading; a DAR of less than 1.0 is significant because it indicates:

Conductive contamination or moisture-saturated insulation (Correct answer)
Excessive test voltage causing insulation stress
Good insulation with high capacitive absorption
Normal dielectric polarization of a healthy winding

Correct answer: Conductive contamination or moisture-saturated insulation

Healthy insulation shows resistance that increases over time as polarization currents diminish; a DAR < 1.0 means resistance dropped, indicating conductive contamination or wet insulation dominating leakage current.

Question 8: During an electrical panel thermography inspection, a single-phase connection shows a temperature of 85°C while the other two phases are at 35°C. This most likely indicates:

Phase reversal
Loose or high-resistance connection (Correct answer)
Normal load imbalance
Overloaded circuit breaker

Correct answer: Loose or high-resistance connection

A single hot spot at one connection point with significantly elevated temperature compared to similar phases indicates a loose or corroded high-resistance connection.

Question 9: A plant switches a centrifugal pump from scheduled time-based overhauls every 6 months to vibration-based monitoring with overhaul only when needed. This change represents a shift from:

Corrective to preventive maintenance
Preventive to predictive maintenance (Correct answer)
Run-to-failure to corrective maintenance
Predictive to proactive maintenance

Correct answer: Preventive to predictive maintenance

Condition-based (predictive) maintenance uses real-time equipment health data to schedule interventions, replacing fixed-interval preventive overhauls.

Question 10: A maintenance team is using a Fishbone (Ishikawa) diagram to analyze the root cause of frequent bearing failures on a fan. Which of the following would be an appropriate category, or 'bone,' to use on this diagram?

Return on Investment
Predictive Maintenance Schedule
Methods (Correct answer)
Failure Code

Correct answer: Methods

The Fishbone diagram, also known as an Ishikawa or cause-and-effect diagram, organizes potential causes into categories to identify the root cause of a problem. [6, 7] Standard categories often used in manufacturing and maintenance are the 6Ms: Manpower, Methods, Machines, Materials, Measurement, and Mother Nature (Environment). [6] 'Methods' refers to the procedures and processes used, such as lubrication procedures or installation techniques, which is a key area to investigate for bearing failures.

Question 11: A maintenance technician receives a work order to replace a bearing on a critical conveyor belt. Which of the following is the MOST crucial piece of information that must be included on the work order before starting the job?

The cost of the new bearing
The date of the last maintenance activity
A unique asset identifier for the conveyor (Correct answer)
The name of the technician who completed the previous job

Correct answer: A unique asset identifier for the conveyor

A unique asset identifier (e.g., equipment number) is essential to ensure the technician performs work on the correct piece of equipment. This prevents potentially catastrophic errors. While other information is useful for planning and history, verifying the correct asset is a primary step for safety and accuracy.

Question 12: What is the recommended target range for a healthy maintenance work order backlog?

6 to 8 weeks of available crew work
2 to 4 weeks of available crew work (Correct answer)
More than 12 weeks of available crew work
0 to 1 week of work

Correct answer: 2 to 4 weeks of available crew work

A backlog of 2 to 4 weeks of crew work is generally considered healthy — enough work to keep crews busy and allow efficient scheduling without becoming unmanageable.

Question 13: A lubricant's viscosity index (VI) is a measure of:

The lubricant's resistance to oxidation at high temperatures
How much the viscosity changes with temperature variations (Correct answer)
The lubricant's film strength under extreme pressure
The rate of additive depletion during service

Correct answer: How much the viscosity changes with temperature variations

Viscosity index quantifies the sensitivity of a lubricant's viscosity to temperature change; a high VI means viscosity changes little across a wide temperature range.

Question 14: During hot work (welding/cutting) near flammable materials, which action is the FIRST priority before igniting a torch?

Notify the fire department of the planned work
Obtain a hot work permit and verify the area is clear of flammable materials within the required radius (Correct answer)
Don welding PPE including face shield and leather gloves
Ensure a fire watch is stationed with a charged extinguisher

Correct answer: Obtain a hot work permit and verify the area is clear of flammable materials within the required radius

Obtaining a hot work permit and clearing the area of flammable materials within the required distance is the first administrative step that authorizes and conditions the work.

Question 15: Backlog management in a corrective maintenance program primarily involves:

Tracking completed preventive maintenance tasks
Managing and prioritizing the list of pending maintenance work orders (Correct answer)
Reviewing spare parts inventory levels
Scheduling employee vacation time

Correct answer: Managing and prioritizing the list of pending maintenance work orders

Backlog management ensures pending corrective work orders are ranked, resourced, and executed in order of priority before the backlog grows unmanageable.

Question 16: What is 'backlash' in a gear set and what are the consequences of excessive backlash?

The speed differential between the driving and driven gears due to gear ratio
The angular clearance between mating gear teeth that allows for lubrication and thermal expansion, and excessive backlash causes impact loading and tooth wear (Correct answer)
The axial thrust generated by helical gear tooth geometry under load
The torsional stiffness of the gear shaft that limits power transmission

Correct answer: The angular clearance between mating gear teeth that allows for lubrication and thermal expansion, and excessive backlash causes impact loading and tooth wear

Backlash is the intentional clearance between mating gear teeth; excessive backlash causes impact loading (shock loads) during load reversals, accelerating tooth wear and potentially causing tooth fracture.

Question 17: What is a key concept in equipment reliability?

Ignoring small issues
Waiting for breakdowns
Routine checks and early detection (Correct answer)
Delaying inspections

Correct answer: Routine checks and early detection

Achieving high equipment reliability hinges on the consistent application of routine checks and the early detection of anomalies. By regularly inspecting machinery and utilizing predictive technologies, potential issues can be identified and addressed before they cause significant breakdowns. This proactive approach minimizes unplanned downtime, extends the operational life of assets, and optimizes maintenance expenditures.

Question 18: A technician needs to perform maintenance on equipment located 15 feet above the ground. They will be using a supported scaffold. According to OSHA standards, what is the primary requirement for this scaffold before use?

It must be assembled by a certified engineer.
It must be inspected for defects by a competent person before each work shift. (Correct answer)
It must be painted a high-visibility color.
It must have a load capacity of at least two times the intended load.

Correct answer: It must be inspected for defects by a competent person before each work shift.

OSHA regulation 29 CFR 1926.451(f)(3) explicitly requires that scaffolds be inspected for any visible defects by a competent person before each shift and after any event that could affect its structural integrity. While load capacity is critical (it must support at least four times the intended load), the pre-shift inspection is a mandatory, recurring safety procedure.

Question 19: What is the primary goal of maintenance practices?

To extend equipment life and reliability (Correct answer)
To reduce technician training
To delay equipment use
To replace parts frequently

Correct answer: To extend equipment life and reliability

The primary goal of maintenance practices is to extend the operational life and enhance the reliability of equipment. By performing regular inspections, servicing, and repairs, maintenance prevents unexpected breakdowns and ensures machinery functions optimally. This approach minimizes downtime, reduces repair costs, and maximizes productivity.

Question 20: Which of the following BEST describes a 'standing work order'?

A work order that requires the approval of a senior manager before work can begin
A work order that is permanently pinned to the top of the backlog regardless of priority
A work order for emergency repairs that must be started immediately
A recurring or open-ended work order used to capture labor and materials for routine repetitive tasks without creating individual work orders each time (Correct answer)

Correct answer: A recurring or open-ended work order used to capture labor and materials for routine repetitive tasks without creating individual work orders each time

Standing work orders are open orders used to collect costs for routine, repetitive tasks (like minor housekeeping or daily inspections) without the administrative burden of creating a new work order each time.

Question 21: In maintenance planning, what does 'wrench time' measure?

The torque applied to fasteners during repair
The time technicians spend actively performing hands-on maintenance work (Correct answer)
The time required to procure specialty wrenches for a job
The scheduled maintenance interval for torque-sensitive components

Correct answer: The time technicians spend actively performing hands-on maintenance work

Wrench time (also called tool time) measures the percentage of a technician's day actually spent performing direct maintenance work, excluding travel, waiting, and administrative tasks.

Question 22: During corrective maintenance, a technician discovers the actual failure mode differs from the reported symptom. What is the correct next step?

Ignore the discrepancy and complete the repair
Immediately escalate to management without documenting
Update the work order to reflect the true failure and scope change (Correct answer)
Continue with the original work order scope only

Correct answer: Update the work order to reflect the true failure and scope change

Work orders must be updated to accurately reflect all discovered failure modes so repairs are complete and records remain accurate.

Question 23: Insulation resistance testing (Megger test) on a motor winding measures resistance in megohms; a reading that has trended downward over successive tests most likely indicates:

Increased supply voltage above rated levels
Moisture ingress or contamination degrading winding insulation (Correct answer)
Rotor eccentricity causing air gap variation
Bearing wear increasing shaft vibration

Correct answer: Moisture ingress or contamination degrading winding insulation

Declining insulation resistance trend is a key indicator of moisture absorption, contamination, or thermal aging breaking down the winding insulation, increasing the risk of ground fault.

Question 24: Which of the following is the final step in a standard lockout/tagout (LOTO) procedure, performed before maintenance work begins?

Apply lockout and tagout devices.
Notify all affected employees.
Verify the isolation and de-energization of the equipment. (Correct answer)
Shut down the equipment using normal procedures.

Correct answer: Verify the isolation and de-energization of the equipment.

After applying locks and tags and releasing any stored energy, the final and most critical step before starting work is to verify that the equipment is truly de-energized. This is typically done by attempting a normal startup of the equipment to ensure it does not activate, confirming the isolation was successful.

Question 25: Under OSHA 29 CFR 1910.132, who is responsible for providing PPE to employees at no cost when it is required for safety?

The equipment manufacturer, as part of the equipment's safe-use requirements
The employer, except for everyday clothing and items the employee controls away from work (Correct answer)
The insurance carrier covering the workplace
The employee, since PPE is considered personal property

Correct answer: The employer, except for everyday clothing and items the employee controls away from work

OSHA requires employers to provide required PPE at no cost to employees, with limited exceptions for items like ordinary safety-toe footwear used away from the workplace.

Question 26: Which vibration measurement transducer type is most appropriate for measuring absolute shaft displacement in sleeve (journal) bearing machines?

Eddy-current proximity probe (Correct answer)
Piezoelectric accelerometer
Velocity geophone
MEMS accelerometer

Correct answer: Eddy-current proximity probe

Eddy-current proximity probes measure relative displacement between the shaft and bearing housing directly, making them ideal for journal bearing machines where shaft orbit is the key parameter.

Question 27: Which property of a lubricant is described by its 'flash point'?

The temperature at which the oil begins to oxidize rapidly
The temperature at which the oil loses all lubricating properties
The lowest temperature at which the oil vaporizes sufficiently to ignite briefly when exposed to a flame (Correct answer)
The temperature at which the oil ignites and sustains combustion

Correct answer: The lowest temperature at which the oil vaporizes sufficiently to ignite briefly when exposed to a flame

The flash point is the lowest temperature at which vapors above the oil will briefly ignite when exposed to an open flame, making it an important safety and fire-hazard indicator.

Question 28: A maintenance supervisor receives a near-miss report where a heavy part was nearly dropped on a worker below a mezzanine. The MOST important immediate corrective action is:

Schedule a general safety meeting for the following week to discuss dropped object hazards
Establish a barricaded exclusion zone below elevated work areas and implement a tool tethering policy (Correct answer)
Document the incident in the OSHA 300 log within 24 hours
Counsel the employee who nearly dropped the part on safe work practices

Correct answer: Establish a barricaded exclusion zone below elevated work areas and implement a tool tethering policy

Establishing an exclusion zone and tethering policy directly addresses the dropped-object hazard immediately, protecting workers while a long-term solution is developed.

Question 29: What is a key concept in preventive and predictive maintenance?

Ignoring small issues
Delaying inspections
Waiting for breakdowns
Routine checks and early detection (Correct answer)

Correct answer: Routine checks and early detection

Question 30: Which electrical safety standard governs safe work practices for electrical installations in general industry, including maintenance activities?

ANSI Z10 — Occupational Health and Safety Management Systems
OSHA 29 CFR 1926.404 (construction wiring methods)
NFPA 70E — Standard for Electrical Safety in the Workplace (Correct answer)
OSHA 29 CFR 1910.147 (LOTO standard)

Correct answer: NFPA 70E — Standard for Electrical Safety in the Workplace

NFPA 70E establishes electrical safety requirements for workers in general industry, including arc flash boundaries, PPE selection, and energized work permits.

Question 31: A facility wants to improve maintenance effectiveness. Which sequence represents the correct order of the planning and scheduling process?

Plan → Identify need → Execute → Schedule → Review
Schedule → Plan → Execute → Review
Identify need → Plan → Schedule → Execute → Review/close (Correct answer)
Execute → Plan → Schedule → Identify need → Review

Correct answer: Identify need → Plan → Schedule → Execute → Review/close

The correct sequence is: identify the maintenance need, plan the job (job package), schedule it (assign time and crew), execute the work, then review and close the work order.

Question 32: The PRIMARY purpose of documenting corrective maintenance activities in a CMMS is to:

Build a failure history that supports root cause analysis and future planning (Correct answer)
Prove that technicians were present on site
Justify overtime pay for technicians
Satisfy accounting department requirements only

Correct answer: Build a failure history that supports root cause analysis and future planning

Accurate failure records create a data-driven history that enables trend analysis, root cause investigations, and informed decisions about PM intervals and spare parts.

Question 33: When using contact ultrasound to inspect rolling element bearings, what does a loud, irregular crackling or 'frying' sound in the headset typically indicate?

Normal lubrication of the bearing
Early-stage bearing damage such as spalling or pitting (Correct answer)
Belt slippage on a V-belt drive
Shaft misalignment between coupled machines

Correct answer: Early-stage bearing damage such as spalling or pitting

Irregular crackling or frying sounds in ultrasonic bearing inspection are caused by stress waves generated when rolling elements strike defects such as spalls or pits on race surfaces.

Question 34: When performing a group lockout on a complex machine with multiple energy sources, which statement best describes the correct approach?

Each authorized employee applies their own personal lock to a hasp or lockout device (Correct answer)
The supervisor applies a master lock and distributes keys to all workers
One authorized employee applies a single lock on behalf of the entire crew
A single tag is placed on the main disconnect and the crew verbally confirms awareness

Correct answer: Each authorized employee applies their own personal lock to a hasp or lockout device

In a group lockout, every authorized employee applies their own personal lock so no single individual can re-energize equipment while others are still working.

Question 35: What does the term 'tribology' refer to in the context of maintenance?

The measurement of vibration in rotating equipment
The study of friction, wear, and lubrication between interacting surfaces (Correct answer)
The process of aligning rotating shafts
The analysis of corrosion in metal components

Correct answer: The study of friction, wear, and lubrication between interacting surfaces

Tribology is the science that studies friction, wear, and lubrication of interacting surfaces in relative motion.

Question 36: Which lubrication regime occurs when the lubricant film fully separates the two mating surfaces?

Boundary lubrication
Elasto-hydrodynamic lubrication
Mixed lubrication
Hydrodynamic (full-film) lubrication (Correct answer)

Correct answer: Hydrodynamic (full-film) lubrication

Hydrodynamic (full-film) lubrication occurs when the lubricant film is thick enough to completely separate the mating surfaces, minimizing metal-to-metal contact.

Question 37: What is the primary goal of maintenance practices?

To delay equipment use
To replace parts frequently
To reduce technician training
To extend equipment life and reliability (Correct answer)

Correct answer: To extend equipment life and reliability

Question 38: When a maintenance task requires use of a portable electric grinder, which safety check is critical before operation?

Performing a ring test on the abrasive wheel and verifying the wheel RPM rating exceeds the tool's maximum RPM (Correct answer)
Lubricating the spindle bearing before mounting the wheel
Confirming the wheel diameter matches the grinder's disc brake capacity
Confirming the grinder has a torque-limiting clutch installed

Correct answer: Performing a ring test on the abrasive wheel and verifying the wheel RPM rating exceeds the tool's maximum RPM

A ring test checks for cracks in the abrasive wheel (cracked wheels shatter at speed), and the wheel's maximum RPM must never be less than the tool's no-load RPM to prevent wheel failure.

Question 39: When performing vibration analysis, which measurement parameter is generally most sensitive to high-frequency bearing defect impacts?

Velocity
Acceleration (Correct answer)
Jerk
Displacement

Correct answer: Acceleration

Acceleration is most sensitive to high-frequency shock events such as early-stage bearing defects because it amplifies high-frequency content that displacement and velocity would attenuate.

Question 40: A maintenance technician is told a job is 'ready-to-schedule.' What does this status typically mean?

The work order has been completed and is awaiting final supervisor sign-off
The technician has been assigned and is currently performing the work
The equipment has been identified as needing maintenance but no planning has started
The work order has been approved, fully planned with a job package, and all required materials and permits are available (Correct answer)

Correct answer: The work order has been approved, fully planned with a job package, and all required materials and permits are available

A 'ready-to-schedule' job has a complete job plan, required materials are on hand or on order with confirmed availability, and all prerequisites (permits, clearances) are arranged.

Question 41: When analyzing motor current data, a significant increase in the amplitude of sidebands at frequencies corresponding to 'slot harmonics' around the supply frequency indicates:

Stator winding inter-turn short circuit
Rotor eccentricity or air gap variation (Correct answer)
Bearing defect on the drive-end bearing
Overloading beyond full-load amperage

Correct answer: Rotor eccentricity or air gap variation

Slot harmonic sidebands in the motor current spectrum are amplified by air gap variations caused by rotor eccentricity, making them useful for detecting dynamic or static eccentricity.

Question 42: Equipment criticality ranking is used in maintenance planning to:

Schedule all equipment for equal maintenance intervals
Calculate the depreciation schedule for capital assets
Prioritize maintenance resources toward assets with the greatest risk impact (Correct answer)
Determine the pay grade of maintenance technicians

Correct answer: Prioritize maintenance resources toward assets with the greatest risk impact

Criticality ranking scores equipment based on failure consequence and probability, enabling maintenance teams to focus resources where failure impact is greatest.

Question 43: What does 'NLGI grade' indicate for a grease product?

The high-temperature performance rating of the grease
The National Lubrication Grade Index rating for oxidation resistance
The consistency (hardness or softness) of the grease as classified by the NLGI (Correct answer)
The base oil viscosity of the grease formulation

Correct answer: The consistency (hardness or softness) of the grease as classified by the NLGI

NLGI (National Lubricating Grease Institute) grades classify grease consistency on a scale from 000 (very fluid) to 6 (very stiff), with NLGI 2 being the most common for general industrial use.

Question 44: Which failure analysis method uses Boolean logic to evaluate combinations of component failures that lead to a top-level system failure?

FMEA
RCM
Fault Tree Analysis (Correct answer)
Weibull analysis

Correct answer: Fault Tree Analysis

Fault Tree Analysis uses AND/OR logic gates to graphically map how combinations of lower-level failures cause a specific top-level undesired event.

Question 45: A recurring bearing failure on a conveyor drive is BEST addressed by:

Increasing the frequency of corrective maintenance visits
Replacing the entire conveyor with a newer model
Stocking more replacement bearings to speed up future repairs
Investigating root causes such as lubrication adequacy, alignment, or overloading (Correct answer)

Correct answer: Investigating root causes such as lubrication adequacy, alignment, or overloading

Recurring failures signal an unresolved root cause; investigating lubrication, alignment, and loading conditions addresses the source rather than just the symptom.

Question 46: When performing corrective maintenance on a gearbox, technicians find metal particles in the oil. What is the BEST initial diagnostic step?

Increase the operating speed to flush particles
Perform oil analysis and inspect a magnetic drain plug sample to identify particle type (Correct answer)
Drain the oil and refill immediately
Weld-repair any visible cracks on the housing

Correct answer: Perform oil analysis and inspect a magnetic drain plug sample to identify particle type

Particle morphology (shape, composition, size) from oil analysis and magnetic plug inspection identifies the specific failed component.

Question 47: A shaft seal fails due to excessive radial load causing misalignment. According to RCA classification, this is best categorized as which type of root cause?

Latent root cause
Human root cause
Physical root cause (Correct answer)
Systemic root cause

Correct answer: Physical root cause

The physical root cause is the tangible, material condition (excessive radial load causing misalignment) that directly produced the failure.

Question 48: What is a key concept in equipment reliability?

Delaying inspections
Routine checks and early detection (Correct answer)
Ignoring small issues
Waiting for breakdowns

Correct answer: Routine checks and early detection

To maintain high equipment reliability, routine checks and early detection are indispensable. Consistent monitoring of equipment health through scheduled inspections and condition-based techniques enables the identification of potential failures at their nascent stages. This proactive intervention prevents catastrophic breakdowns, reduces repair complexity, and ensures continuous, efficient operation.

Question 49: Surge (high-potential impulse) testing on motor windings is specifically designed to detect which type of defect?

Turn-to-turn insulation failures within a coil (Correct answer)
Air gap eccentricity between rotor and stator
Bearing housing looseness causing vibration coupling into windings
Phase imbalance in the supply voltage

Correct answer: Turn-to-turn insulation failures within a coil

Surge testing applies a high-voltage impulse to compare waveform patterns between phases; differences indicate turn-to-turn insulation weaknesses that Megger testing cannot locate.

Question 50: Which statistical analysis technique is commonly used in PdM programs to identify the most critical failure modes to monitor, based on severity, occurrence, and detectability?

Failure Mode Effects and Criticality Analysis (FMECA) (Correct answer)
Weibull probability plotting
Mean Time To Repair (MTTR) calculation
Statistical Process Control (SPC) charting

Correct answer: Failure Mode Effects and Criticality Analysis (FMECA)

FMECA ranks failure modes by Risk Priority Number (RPN = Severity × Occurrence × Detectability), helping prioritize which failure modes most need predictive monitoring coverage.

Question 51: A technician is developing a predictive maintenance plan for a plant's critical assets. The primary goal is to transition from a time-based maintenance schedule to a condition-based approach. What is the fundamental principle of this transition?

Scheduling maintenance at fixed intervals regardless of equipment condition.
Using real-time equipment data to determine when maintenance is actually necessary. (Correct answer)
Replacing components based on their average expected lifespan.
Performing maintenance only after a failure has occurred to minimize costs.

Correct answer: Using real-time equipment data to determine when maintenance is actually necessary.

The core principle of predictive maintenance (PdM) is to use condition-monitoring technologies to collect real-time data on the health of equipment. This data-driven approach allows maintenance to be scheduled only when needed, based on the actual condition of the asset, rather than on a fixed time schedule or after a failure.

Question 52: When performing laser shaft alignment, an angular misalignment condition is corrected by:

Adjusting the coupling spider
Adding or removing shims under the feet to change the shaft angle (Correct answer)
Moving the moveable machine axially
Increasing bearing preload

Correct answer: Adding or removing shims under the feet to change the shaft angle

Angular misalignment (shaft centerlines not parallel) is corrected by shimming under the feet of the moveable machine to change the shaft's angle relative to the driver.

Question 53: What is the primary goal of maintenance practices?

To delay equipment use
To reduce technician training
To replace parts frequently
To extend equipment life and reliability (Correct answer)

Correct answer: To extend equipment life and reliability

Question 54: What does 'L10 bearing life' mean in the context of bearing selection and reliability?

The bearing's rated life at 10,000 RPM under full radial load
The number of hours or revolutions at which 90% of a group of identical bearings will still be operating (10% have failed) (Correct answer)
The life expectancy of a bearing operating at 10% of its rated load
The time in hours for a bearing to reach its maximum operating temperature

Correct answer: The number of hours or revolutions at which 90% of a group of identical bearings will still be operating (10% have failed)

L10 (or B10) bearing life is the statistically calculated life at which 10% of bearings in a group will have failed due to fatigue, meaning 90% will survive to or beyond that life.

Question 55: A maintenance technician is about to enter a permit-required confined space when the atmospheric monitor alarms for low oxygen (18%). The correct action is:

Enter with a buddy and limit exposure time to under 10 minutes
Enter immediately to quickly determine and fix the source of oxygen displacement
Don a dust mask and proceed since the level is only slightly below normal
Ventilate the space continuously and re-test; do not enter until oxygen is between 19.5% and 23.5% (Correct answer)

Correct answer: Ventilate the space continuously and re-test; do not enter until oxygen is between 19.5% and 23.5%

OSHA defines an oxygen-deficient atmosphere as below 19.5%; the space must be ventilated and re-tested to confirm acceptable oxygen levels before any entry without supplied-air respiratory protection.

Question 56: In the context of equipment reliability, 'P-F interval' refers to:

The interval between the point of potential failure detection and functional failure (Correct answer)
The period between two consecutive preventive maintenance activities
The time from failure report to parts procurement
The time from planned maintenance to full restoration

Correct answer: The interval between the point of potential failure detection and functional failure

The P-F interval is the time from when a potential failure (P) can first be detected to when it degrades into a functional failure (F), defining the window for condition monitoring.

Question 57: Which component of an effective safety management system (SMS) is specifically designed to use incident and near-miss data to prevent future occurrences?

Hazard communication program
Emergency action plan
Incident investigation and corrective action process (Correct answer)
Safety orientation and onboarding program

Correct answer: Incident investigation and corrective action process

The incident investigation and corrective action process analyzes root causes from incidents and near-misses and implements system changes to eliminate those causes and prevent recurrence.

Question 58: The split-half troubleshooting method involves:

Replacing half the components at once and observing the result
Assigning two technicians to the same work order
Testing the midpoint of a system to halve the number of suspect components with each test (Correct answer)
Dividing the repair cost equally between two maintenance departments

Correct answer: Testing the midpoint of a system to halve the number of suspect components with each test

Split-half testing applies a binary search logic: test at the midpoint, determine which half contains the fault, then repeat on that half—dramatically reducing diagnostic time.

Question 59: In a risk assessment matrix, a hazard rated 'Likely' for probability and 'Catastrophic' for severity would typically be classified as:

Negligible risk — document and monitor at next scheduled review
Medium risk — requires additional administrative controls
Low risk — acceptable with standard precautions
High or critical risk — requires immediate corrective action before work proceeds (Correct answer)

Correct answer: High or critical risk — requires immediate corrective action before work proceeds

High probability combined with catastrophic severity places the risk in the highest category, requiring immediate corrective action rather than scheduling a future review.

Question 60: What are the two primary types of shaft misalignment?

Angular misalignment and parallel (offset) misalignment (Correct answer)
Radial misalignment and torsional misalignment
Horizontal misalignment and axial misalignment
Static misalignment and dynamic misalignment

Correct answer: Angular misalignment and parallel (offset) misalignment

The two primary types of shaft misalignment are angular misalignment (shafts at an angle) and parallel (offset) misalignment (shaft centerlines are parallel but offset from each other).

Question 61: What is the primary goal of maintenance practices?

To replace parts frequently
To delay equipment use
To reduce technician training
To extend equipment life and reliability (Correct answer)

Correct answer: To extend equipment life and reliability

Question 62: An arc flash hazard analysis determines an incident energy level of 8 cal/cm² at the working distance. What minimum arc flash PPE category is required per NFPA 70E?

PPE Category 1 (minimum 4 cal/cm² arc rating)
PPE Category 4 (minimum 40 cal/cm² arc rating)
PPE Category 2 (minimum 8 cal/cm² arc rating) (Correct answer)
PPE Category 3 (minimum 25 cal/cm² arc rating)

Correct answer: PPE Category 2 (minimum 8 cal/cm² arc rating)

PPE Category 2 has a minimum arc rating of 8 cal/cm², which exactly meets the incident energy level of 8 cal/cm² and is therefore the minimum required category.

Question 63: When a centrifugal pump loses prime during operation, what is the FIRST corrective action a technician should take?

Check suction line for air leaks or blockages (Correct answer)
Replace the mechanical seal
Increase motor speed immediately
Disassemble the pump volute

Correct answer: Check suction line for air leaks or blockages

Loss of prime is most commonly caused by air ingestion through suction-side leaks or blockages, so that should be investigated first.

Question 64: What alignment measurement tool provides the highest accuracy for modern industrial shaft alignment?

Dial indicators mounted on a bracket straddling the coupling
Laser alignment system with rotating targets (Correct answer)
Straightedge and feeler gauge
Optical tooling scope and target

Correct answer: Laser alignment system with rotating targets

Laser alignment systems provide the highest accuracy and ease of use by projecting laser beams between shaft-mounted targets and computing misalignment values and correction moves automatically.

Question 65: What is the purpose of a keyway and key in a shaft-hub connection?

To prevent the hub from vibrating by adding mass to the assembly
To transmit torque between the shaft and the hub by providing a positive mechanical drive (Correct answer)
To allow fine angular position adjustment of the hub on the shaft
To allow the hub to slide freely along the shaft for axial adjustment

Correct answer: To transmit torque between the shaft and the hub by providing a positive mechanical drive

A key inserted into matching keyways on both the shaft and hub creates a positive mechanical connection that transmits torque while preventing relative rotation between the two components.

Question 66: What is a key concept in equipment reliability?

Delaying inspections
Ignoring small issues
Routine checks and early detection (Correct answer)
Waiting for breakdowns

Correct answer: Routine checks and early detection

A key concept for ensuring equipment reliability is the diligent practice of routine checks and early detection. Regular monitoring and inspections allow maintenance teams to spot subtle signs of wear, impending failure, or operational deviations. Addressing these issues promptly prevents them from escalating into major problems, thereby sustaining equipment performance and extending its useful life.

Question 67: Which activity BEST exemplifies quality assurance within a corrective maintenance program?

Allowing technicians to self-certify all repairs without any independent review
Skipping post-repair documentation when the repair appears straightforward
Sourcing all replacement parts exclusively from the cheapest available vendor
Verifying that repairs conform to manufacturer specifications and performance standards (Correct answer)

Correct answer: Verifying that repairs conform to manufacturer specifications and performance standards

Quality assurance requires comparing the repaired equipment's condition and performance against defined standards, not just confirming it 'runs'—this catches inadequate repairs before they cause secondary failures.

Question 68: What is a key concept in preventive and predictive maintenance?

Waiting for breakdowns
Delaying inspections
Routine checks and early detection (Correct answer)
Ignoring small issues

Correct answer: Routine checks and early detection

Preventive and predictive maintenance strategies are built upon the principle of proactive intervention. Routine checks allow technicians to monitor equipment health regularly, while early detection of potential issues enables repairs or adjustments before minor problems escalate into costly breakdowns. This approach minimizes downtime, extends asset life, and optimizes operational efficiency.

Question 69: A vibration spectrum shows a dominant frequency at exactly 1× running speed with high amplitude. What condition does this most likely indicate?

Mass unbalance (Correct answer)
Gear mesh problem
Bearing defect
Looseness

Correct answer: Mass unbalance

A dominant 1× running speed frequency is the classic signature of mass unbalance, where rotating mass is not distributed evenly around the shaft axis.

Question 70: Work order priority systems typically assign priority codes based on which two factors?

Urgency of the need and consequences of deferring the work (Correct answer)
The supervisor's preference and the equipment manufacturer's recommendation
The skill level required and the number of technicians available
Equipment age and purchase cost

Correct answer: Urgency of the need and consequences of deferring the work

Priority codes are based on urgency (how soon the work must start) and criticality (the safety, production, or cost consequences of not doing the work promptly).

Question 71: Which of the following maintenance strategies is triggered by real-time equipment condition data rather than a fixed schedule?

Reactive Maintenance
Corrective Maintenance
Predictive Maintenance (PdM) (Correct answer)
Preventive Maintenance

Correct answer: Predictive Maintenance (PdM)

Predictive Maintenance (PdM) uses condition-monitoring tools and techniques (like vibration analysis, oil analysis, or infrared thermography) to collect real-time data and predict when a failure will occur. Maintenance is then scheduled only when it is needed, based on the asset's actual condition.

Question 72: Reliability-Centered Maintenance (RCM) selects maintenance tasks based primarily on which criterion?

Manufacturer's recommended interval
Age of the equipment
Consequences of the failure mode (Correct answer)
Cost of the maintenance task

Correct answer: Consequences of the failure mode

RCM selects maintenance tasks based on the consequences of failure modes — safety, environmental, operational, and economic — to preserve system function.

Question 73: Which of the following describes a primary difference between Preventive Maintenance (PM) and Predictive Maintenance (PdM)?

PM requires advanced diagnostic tools, while PdM relies only on technician senses.
PM is proactive, while PdM is reactive.
PM schedules tasks based on time or usage intervals, while PdM schedules tasks based on equipment condition. (Correct answer)
PM is only performed after a failure has occurred, while PdM is performed before.

Correct answer: PM schedules tasks based on time or usage intervals, while PdM schedules tasks based on equipment condition.

The fundamental difference lies in the trigger for maintenance activity. Preventive Maintenance (PM) is time-based or usage-based, meaning tasks are performed at predetermined intervals (e.g., every 3 months or 500 operating hours) regardless of the asset's actual condition. Predictive Maintenance (PdM) is condition-based; tasks are triggered by data from monitoring equipment that indicates a potential failure is developing.

Question 74: A maintenance organization tracks 'PM Compliance' as a key metric. What does a PM compliance rate of 75% indicate?

75% of the maintenance budget is spent on preventive maintenance
75% of equipment is covered by a preventive maintenance program
Preventive maintenance reduced equipment failures by 75%
Only 75% of scheduled preventive maintenance tasks were completed on time within the defined scheduling window (Correct answer)

Correct answer: Only 75% of scheduled preventive maintenance tasks were completed on time within the defined scheduling window

PM compliance (or PM schedule compliance) measures the percentage of preventive maintenance tasks completed within their scheduled time window, with 75% indicating one in four PMs was missed or overdue.

Question 75: What is the primary goal of maintenance practices?

To reduce technician training
To replace parts frequently
To extend equipment life and reliability (Correct answer)
To delay equipment use

Correct answer: To extend equipment life and reliability

Question 76: What does 'interference fit' (press fit) mean when installing a bearing or coupling hub on a shaft?

The hub is threaded onto the shaft to create a tight mechanical connection
The hub or bearing bore is slightly smaller than the shaft diameter, requiring force or heating to assemble (Correct answer)
The shaft and hub are the same size, requiring no force to assemble
The hub or bearing bore is slightly larger than the shaft, allowing hand assembly

Correct answer: The hub or bearing bore is slightly smaller than the shaft diameter, requiring force or heating to assemble

An interference fit (press fit) means the bore is smaller than the shaft diameter so the component must be pressed or thermally expanded for installation, creating a tight grip that transmits loads without slipping.

Question 77: Which bearing type is best suited for applications with primarily axial (thrust) loads combined with moderate radial loads?

Needle roller bearing
Deep groove ball bearing
Cylindrical roller bearing
Angular contact ball bearing (Correct answer)

Correct answer: Angular contact ball bearing

Angular contact ball bearings are designed to carry combined axial and radial loads simultaneously, with the contact angle determining the relative proportion of thrust versus radial load capacity.

Question 78: What is a key concept in preventive and predictive maintenance?

Waiting for breakdowns
Delaying inspections
Routine checks and early detection (Correct answer)
Ignoring small issues

Correct answer: Routine checks and early detection

Question 79: A corrective maintenance work order is typically initiated when:

A new piece of equipment is purchased
Equipment fails or its performance drops below acceptable standards (Correct answer)
A preventive maintenance inspection is due
The maintenance manager requests a quarterly budget review

Correct answer: Equipment fails or its performance drops below acceptable standards

Corrective maintenance is triggered by an actual failure event or a detected degradation that renders the equipment unable to meet its required function.

Question 80: The OSHA recordkeeping standard (29 CFR 1904) requires an employer to record a work-related injury on the OSHA 300 log when it results in:

Days away from work, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis of a significant injury (Correct answer)
Any prescription medication prescribed by a physician, even if taken off-site
Any visit to a first-aid station regardless of treatment given
Worker's compensation claim submission, regardless of injury severity

Correct answer: Days away from work, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis of a significant injury

OSHA lists specific recording criteria: days away, restricted duty, job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury/illness diagnosed by a healthcare professional.

Question 81: What is the primary function of a Minimum Approach Distance (MAD) in electrical maintenance?

To establish the closest distance a qualified worker may approach exposed energized conductors based on system voltage (Correct answer)
To determine the required clearance between energized conductors and grounded structures
To specify the minimum distance electrical equipment must be placed from combustible materials
To define the boundary within which all personnel must wear rubber-insulated gloves

Correct answer: To establish the closest distance a qualified worker may approach exposed energized conductors based on system voltage

MAD is the minimum safe approach distance for qualified electrical workers, calculated based on the system voltage and the insulating ability of the air gap, to prevent flashover or shock.

Question 82: In process parameter monitoring, which parameter is the most direct indicator of pump cavitation?

Motor current draw
Discharge pressure pulsation and elevated broadband vibration (Correct answer)
Seal flush flow rate
Bearing temperature

Correct answer: Discharge pressure pulsation and elevated broadband vibration

Cavitation produces broadband vibration increases and characteristic pressure pulsations as vapor bubbles collapse implosively within the pump.

Question 83: In lubricant oil analysis, a sharp increase in iron particle count combined with a high particle size distribution skewed toward larger particles most likely indicates:

Normal run-in wear of new equipment
Water contamination from a cooling system leak
Severe adhesive or abrasive wear in progress (Correct answer)
Oxidation of the base oil

Correct answer: Severe adhesive or abrasive wear in progress

Large iron particles in high concentration signal active, severe wear (adhesive or abrasive), which requires immediate investigation, unlike the fine particles typical of normal run-in.

Question 84: A maintenance crew is replacing a large motor on a second-floor platform using an overhead crane. Which safety document specifically governs the crane inspection and rigging requirements for this lift?

ANSI Z244.1 — Control of Hazardous Energy (Lockout/Tagout)
OSHA 29 CFR 1910.147 — Control of Hazardous Energy
NFPA 70E — Electrical Safety in the Workplace
OSHA 29 CFR 1910.179 — Overhead and Gantry Cranes, and ASME B30 rigging standards (Correct answer)

Correct answer: OSHA 29 CFR 1910.179 — Overhead and Gantry Cranes, and ASME B30 rigging standards

OSHA 29 CFR 1910.179 covers overhead and gantry cranes, and ASME B30 series standards govern rigging hardware and practices for safe lifting operations.

Question 85: A technician is troubleshooting vibration on a fan assembly after a corrective blade replacement. High 1x vibration is found. This most likely indicates:

Rotor imbalance requiring balancing correction (Correct answer)
Resonance in the electrical supply frequency
Bearing race defect on the inner race
Oil whip in the fan shaft bearing

Correct answer: Rotor imbalance requiring balancing correction

Vibration at 1x running speed (1x RPM) is the classic signature of unbalance, which is common after blade replacement if the new blade weight differs from the original.

Question 86: What is the primary purpose of rust and oxidation (R&O) inhibitors in turbine and circulating oils?

To lower the pour point of the oil for cold-start conditions
To reduce foam generation in high-speed turbine applications
To protect metal surfaces from rust and slow the chemical degradation of the oil (Correct answer)
To increase the load-carrying capacity of the lubricant under shock loads

Correct answer: To protect metal surfaces from rust and slow the chemical degradation of the oil

R&O inhibitors protect metal components from rust and corrosion while also acting as antioxidants to slow oil degradation, extending both component and lubricant service life.

Question 87: What is the purpose of using shims under machine feet during precision alignment?

To absorb vibration from the machine and prevent transmission to the foundation
To replace worn or corroded base plate surfaces
To make fine vertical position corrections and eliminate soft foot conditions (Correct answer)
To increase the height of the machine for better access during maintenance

Correct answer: To make fine vertical position corrections and eliminate soft foot conditions

Shims are thin metal plates inserted under machine feet to make precise vertical height adjustments needed to achieve correct shaft alignment and eliminate soft foot.

Question 88: Infrared thermography is MOST effective during corrective maintenance for identifying:

Chemical contamination in hydraulic fluid
Thermal hot spots caused by loose connections or excessive friction (Correct answer)
Shaft misalignment in rotating equipment
Sub-surface metal fatigue cracks

Correct answer: Thermal hot spots caused by loose connections or excessive friction

IR cameras detect surface temperature anomalies; loose electrical connections and friction-generating mechanical defects produce characteristic hot spots visible in a thermal image.

Question 89: In corrective maintenance, the term 'failure mode' refers to:

The production schedule impact of the downtime
The technician's shift assignment during the failure
The financial cost of the failure event
The specific way in which a component or system ceases to perform its required function (Correct answer)

Correct answer: The specific way in which a component or system ceases to perform its required function

A failure mode describes the observable condition (e.g., seizure, fracture, corrosion) by which an item fails to meet its performance requirement.

Question 90: In vibration analysis, a dominant 1× running speed (1X) frequency component most commonly indicates which condition?

Mass imbalance (Correct answer)
Gear mesh problem
Cavitation
Bearing inner race defect

Correct answer: Mass imbalance

A dominant 1× component in the frequency spectrum is the classic signature of mass imbalance, which produces a force once per shaft revolution.

Question 91: What is the function of a mechanical seal flush plan (API Plan 11) in a centrifugal pump?

To cool the pump casing by circulating seal water through a water jacket
To inject external clean water into the seal chamber to prevent process fluid from reaching the seal
To recirculate clean pumpage from the pump discharge back to the seal chamber to cool and lubricate the seal faces (Correct answer)
To vent air from the seal chamber during pump startup

Correct answer: To recirculate clean pumpage from the pump discharge back to the seal chamber to cool and lubricate the seal faces

API Plan 11 recirculates fluid from the pump discharge through an orifice to the seal chamber, providing cooler, cleaner fluid to lubricate and cool the mechanical seal faces.

Question 92: What is a key concept in troubleshooting and analysis?

Routine checks and early detection (Correct answer)
Ignoring small issues
Delaying inspections
Waiting for breakdowns

Correct answer: Routine checks and early detection

In the realm of troubleshooting and analysis, the emphasis on routine checks and early detection is critical. Regular inspections and performance monitoring help in identifying deviations or potential failures at their earliest stages. This proactive approach not only simplifies the diagnostic process but also enables technicians to address issues before they cause significant operational disruptions or require extensive repairs.

Question 93: What does ISO VG 46 mean on a hydraulic oil label?

The oil contains 46 viscosity index improvers
The oil meets ISO standard 46 for oxidation resistance
The oil has a nominal kinematic viscosity of 46 cSt at 40°C (Correct answer)
The oil has 46% additive content by volume

Correct answer: The oil has a nominal kinematic viscosity of 46 cSt at 40°C

ISO VG (Viscosity Grade) 46 means the oil has a nominal kinematic viscosity of 46 centistokes (cSt) at 40°C as defined by ISO 3448.

Question 94: When installing a new V-belt drive, what is the correct procedure for achieving proper sheave alignment?

Adjust belt tension until both sides of the belt are equally taut
Install the belt and run the drive briefly to allow the belt to self-center in the grooves
Use a straightedge or laser tool to verify the sheave faces are in the same plane and the shafts are parallel (Correct answer)
Align the sheaves by ear — a correctly aligned drive runs quietly without squealing

Correct answer: Use a straightedge or laser tool to verify the sheave faces are in the same plane and the shafts are parallel

Sheave alignment requires a straightedge or laser alignment tool to confirm the sheave faces are coplanar and the shaft centerlines are parallel, preventing uneven belt wear and premature failure.

Question 95: The primary purpose of establishing 'baseline' vibration readings when a new machine is commissioned is to:

Determine the machine's maximum allowable speed
Set the initial lubrication interval
Satisfy regulatory reporting requirements
Provide a reference for future trend comparison while the machine is known to be in good condition (Correct answer)

Correct answer: Provide a reference for future trend comparison while the machine is known to be in good condition

Baseline readings taken under known good conditions establish a reference signature, making it possible to detect and quantify changes that indicate developing faults over time.

Question 96: In rolling element bearing analysis, the Ball Pass Frequency Outer race (BPFO) is calculated using:

Gear tooth count and shaft speed
Rolling element diameter and shaft speed only
Shaft speed and number of blades
Number of balls, ball diameter, pitch diameter, and shaft speed (Correct answer)

Correct answer: Number of balls, ball diameter, pitch diameter, and shaft speed

BPFO = (N/2) × (1 − Bd/Pd × cos θ) × RPM/60, requiring the number of balls, ball diameter, pitch diameter, and contact angle.

Question 97: During a maintenance task, a technician must work on a hydraulic system that stores energy in an accumulator. According to LOTO procedures, the accumulator energy must be:

Labeled with a caution tag indicating stored pressure
Reduced to 50% of operating pressure as an acceptable safe level
Monitored with a pressure gauge throughout the task
Isolated and bled down to zero energy before work proceeds (Correct answer)

Correct answer: Isolated and bled down to zero energy before work proceeds

OSHA's energy control standard requires that all stored energy — including hydraulic accumulator pressure — be released, restrained, or otherwise rendered safe before servicing begins.

Question 98: When using a hierarchy of controls to address a maintenance safety hazard, which control method provides the highest level of protection?

Administrative controls such as written procedures and safety training
Personal protective equipment (PPE) selected for the specific hazard
Elimination of the hazard at its source (Correct answer)
Engineering controls such as guards and ventilation systems

Correct answer: Elimination of the hazard at its source

Elimination — physically removing the hazard — is the most effective control because it prevents exposure entirely rather than managing or mitigating it.

Question 99: Wear particle analysis in oil shows an increase in large (>15 µm) ferrous particles with a cutting wear morphology. What does this indicate?

Severe adhesive or abrasive wear in progress (Correct answer)
Fatigue spalling from rolling elements
Normal break-in wear
Corrosion of ferrous components

Correct answer: Severe adhesive or abrasive wear in progress

Large cutting-type ferrous particles indicate abrasive or adhesive wear where a hard material is cutting through a softer surface under load.

Question 100: A technician responds to a catastrophic bearing failure on a main plant air compressor that has shut down all production. This type of maintenance activity is best classified as:

Emergency Corrective Maintenance (Correct answer)
Proactive Maintenance
Preventive Maintenance
Predictive Maintenance

Correct answer: Emergency Corrective Maintenance

This scenario describes an unplanned, sudden failure of a critical asset that has a severe impact on operations, requiring immediate attention. This is the definition of emergency corrective maintenance.

Question 101: In a CMMS, an equipment history record primarily serves which purpose?

Storing the equipment operator's personal information and certifications
Tracking the purchase orders issued to the original equipment manufacturer
Recording daily production output figures from the equipment
Tracking asset failures, repairs, costs, and maintenance actions over the equipment's life to support reliability analysis (Correct answer)

Correct answer: Tracking asset failures, repairs, costs, and maintenance actions over the equipment's life to support reliability analysis

Equipment history records capture all maintenance events, failures, parts used, and costs over time, providing the data needed for failure trend analysis and reliability improvements.

Question 102: During corrective maintenance documentation, a technician should record 'as-found' conditions BEFORE making any repairs because:

OSHA requires all as-found data be sent to the government
It is required only for insurance claims
It eliminates the need for a post-repair inspection
As-found data provides the baseline for root cause analysis and prevents recurrence (Correct answer)

Correct answer: As-found data provides the baseline for root cause analysis and prevents recurrence

As-found measurements and observations capture the failure state needed to identify root causes and implement changes that prevent the same failure from recurring.

Question 103: When performing a '5-Why' analysis on a gearbox failure, the primary purpose is to:

Determine the statistical failure distribution
Rank all failure modes by severity
Identify the physical, human, and latent root causes (Correct answer)
Quantify the financial impact of the failure

Correct answer: Identify the physical, human, and latent root causes

The 5-Why method drills down through successive 'why' questions to uncover physical, human, and latent systemic root causes.

Question 104: Which type of coupling is most tolerant of shaft misalignment while still transmitting torque?

Flexible elastomeric coupling (Correct answer)
Disc coupling
Jaw (spider) coupling
Rigid (sleeve) coupling

Correct answer: Flexible elastomeric coupling

Flexible elastomeric couplings accommodate angular, parallel, and axial misalignment through the deformation of a rubber or polyurethane element while transmitting torque.

Question 105: What does the Safety Data Sheet (SDS) Section 8 provide that is most directly useful to a maintenance technician handling a chemical?

Exposure limits and required engineering controls and PPE (Correct answer)
First aid measures and emergency response procedures
Regulatory compliance information and transportation requirements
Physical and chemical properties such as boiling point and vapor pressure

Correct answer: Exposure limits and required engineering controls and PPE

SDS Section 8 (Exposure Controls/Personal Protection) specifies permissible exposure limits, threshold limit values, and the controls and PPE needed to protect workers.

Question 106: When a corrective maintenance work order is classified as 'emergency,' what distinguishes it from a 'priority' work order?

Emergency WOs are planned at least 48 hours in advance
Emergency WOs are always lower cost than priority WOs
Emergency WOs require supervisor approval only after the work is done
Emergency WOs address immediate safety hazards or total production stoppages requiring immediate response (Correct answer)

Correct answer: Emergency WOs address immediate safety hazards or total production stoppages requiring immediate response

Emergency work orders represent unplanned failures with immediate safety or production consequences that cannot wait for normal scheduling.

Question 107: Which root cause analysis technique uses a diagram resembling a fish skeleton to organize potential causes of a failure?

Ishikawa diagram (Correct answer)
Fault Tree Analysis
Pareto chart
5-Why analysis

Correct answer: Ishikawa diagram

The Ishikawa (fishbone) diagram organizes potential causes into major categories branching from the effect, resembling a fish skeleton.

Question 108: In a PdM program, the 'alert' alarm level is typically set to trigger:

Daily management reporting only
Immediate machine shutdown
Automatic work order for immediate replacement
Increased monitoring frequency and investigation planning (Correct answer)

Correct answer: Increased monitoring frequency and investigation planning

An alert level indicates an abnormal trend requiring closer monitoring and planning of corrective action, but does not require immediate shutdown.

Question 109: When a PdM route data collector shows a vibration reading that is three times higher than the last measurement taken two weeks ago on the same bearing, the best immediate next step is to:

Re-measure the point to confirm the reading before raising an alarm (Correct answer)
Increase the alarm threshold to accommodate the new reading
Schedule full bearing replacement for the next planned outage in 6 months
Immediately shut down the machine without further investigation

Correct answer: Re-measure the point to confirm the reading before raising an alarm

A sudden large change should first be verified with a repeat measurement to rule out sensor coupling errors, transducer faults, or data entry mistakes before triggering a work order.

Question 110: Which corrective action BEST reduces the probability of a failure recurring after a repair?

Reducing the equipment's scheduled operating hours as a precaution
Stocking additional spare parts to speed up the next repair cycle
Applying improvements that directly address the identified root cause (Correct answer)
Hiring a dedicated technician assigned only to that one piece of equipment

Correct answer: Applying improvements that directly address the identified root cause

Eliminating the root cause—not just repairing the symptom—breaks the failure cycle and prevents recurrence of the same failure mode.

Certified Maintenance & Reliability Technician (CMRT) Exam

This certification validates the knowledge and skills of maintenance and reliability technicians, covering a broad range of topics essential for effective maintenance practices.

110

Questions

150 min

Time Limit

70%

To Pass

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