CITB Health, Safety and Environment (HSE) Test — Questions and Answers

Question 1: Which type of wall is defined as carrying both its own weight and loads from floors or roofs above?

Partition wall
Load-bearing wall (Correct answer)
Cavity wall
Curtain wall

Correct answer: Load-bearing wall

A load-bearing wall is a structural element designed to carry gravity loads from floors, roofs, and walls above and transfer them to the foundation.

Question 2: Which of the following is exempt from requiring Building Regulations approval?

A single-storey extension over 15m²
A loft conversion with habitable space
A detached garden shed under 15m² with no sleeping accommodation (Correct answer)
A new garage attached to a dwelling

Correct answer: A detached garden shed under 15m² with no sleeping accommodation

A detached outbuilding such as a shed under 15m² with no sleeping accommodation is exempt from Building Regulations approval.

Question 3: Who is responsible for ensuring excavations are properly supported and safe for workers on a CDM-notifiable construction project?

The principal contractor only
The local authority building control officer
The excavation equipment supplier
All duty holders including the principal contractor, contractors, and competent supervisors (Correct answer)

Correct answer: All duty holders including the principal contractor, contractors, and competent supervisors

CDM 2015 places duties on all relevant duty holders; the principal contractor must manage overall site safety, but contractors and competent supervisors also share responsibility for ensuring excavations are properly supported and safe.

Question 4: Approved Document E relates to which aspect of building performance?

Energy efficiency
Electrical safety
Emergency lighting
Resistance to the passage of sound (Correct answer)

Correct answer: Resistance to the passage of sound

Approved Document E covers resistance to the passage of sound between rooms and between adjacent buildings.

Question 5: What is the purpose of a Construction Site Sign-in Register?

To record subcontractor valuations
To record material deliveries
To log daily weather conditions
To account for all persons on site for emergency mustering and access control (Correct answer)

Correct answer: To account for all persons on site for emergency mustering and access control

A sign-in register records who is on site at any given time, enabling a full muster during emergencies and providing access control for security purposes.

Question 6: In masonry construction, what is the purpose of a control joint?

To provide drainage for water infiltration
To anchor masonry veneer to the structural backing
To allow for planned cracking due to thermal or shrinkage movement (Correct answer)
To strengthen the wall against lateral loads

Correct answer: To allow for planned cracking due to thermal or shrinkage movement

Control joints are intentional planes of weakness that allow masonry to crack in a controlled, predictable location due to thermal expansion and contraction or shrinkage.

Question 7: Which gas is the leading cause of non-fire-related deaths in confined spaces on construction sites?

Hydrogen sulfide (H2S) (Correct answer)
Oxygen
Nitrogen
Carbon dioxide (CO2)

Correct answer: Hydrogen sulfide (H2S)

Hydrogen sulfide is extremely toxic, odorless at high concentrations, and frequently fatal in confined spaces like sewers and pits.

Question 8: Which document records the day-to-day events, progress, and issues on a construction site?

Method statement
Bill of quantities
Schedule of rates
Site diary (Correct answer)

Correct answer: Site diary

A site diary is a daily record kept by the site manager or engineer that logs events, progress, instructions, and any issues arising on the project.

Question 9: What is the primary purpose of a risk assessment on a construction site?

To calculate project costs
To schedule work activities
To identify hazards and determine appropriate control measures to protect workers (Correct answer)
To assign blame for accidents

Correct answer: To identify hazards and determine appropriate control measures to protect workers

Risk assessments systematically identify potential hazards and evaluate the measures needed to eliminate or reduce risks to workers.

Question 10: Which regulation governs the safe use of electricity at work in construction in the United States?

ANSI Z87.1
DOT Hazmat Rule
EPA Clean Air Act
OSHA 29 CFR 1926 Subpart K (Correct answer)

Correct answer: OSHA 29 CFR 1926 Subpart K

OSHA 29 CFR 1926 Subpart K — Electrical — governs electrical safety standards for construction workers in the United States.

Question 11: Which type of soil is MOST likely to be self-supporting and less prone to collapse in shallow excavations?

Firm cohesive clay (Correct answer)
Made ground
Wet clay
Loose sand

Correct answer: Firm cohesive clay

Firm cohesive clay has natural shear strength that allows it to stand unsupported for short periods in shallow excavations, unlike granular or waterlogged soils.

Question 12: What is the purpose of using insulation materials in construction?

To improve the aesthetic appearance of the building
To increase the weight and strength of construction materials
To increase the structural load-bearing capacity
To enhance the thermal performance and energy efficiency of the building (Correct answer)

Correct answer: To enhance the thermal performance and energy efficiency of the building

Insulation materials are primarily used in construction to enhance a building's thermal performance and energy efficiency. They create a barrier that resists heat flow, keeping interiors warmer in winter and cooler in summer. This reduces the need for heating and cooling, leading to lower energy consumption, decreased utility bills, and a more comfortable indoor environment.

Question 13: What risk response strategy is being applied when a construction company decides to purchase insurance against potential site flooding?

Risk transfer (Correct answer)
Risk mitigation
Risk avoidance
Risk acceptance

Correct answer: Risk transfer

Purchasing insurance transfers the financial consequences of a risk to a third party (the insurer), making it a risk transfer strategy.

Question 14: What is the purpose of a toolbox talk on a construction site?

A formal training certification
A discussion about tool maintenance
A short safety briefing focused on specific hazards relevant to the days work (Correct answer)
A meeting to distribute tools

Correct answer: A short safety briefing focused on specific hazards relevant to the days work

Toolbox talks are brief, informal safety meetings that address specific hazards and safe work practices relevant to current job tasks.

Question 15: What should be included in a site emergency plan?

Just the fire exit locations
Employee home addresses
Only the phone number of the nearest hospital
Evacuation procedures, assembly points, first aid locations, emergency contacts, and fire-fighting equipment locations (Correct answer)

Correct answer: Evacuation procedures, assembly points, first aid locations, emergency contacts, and fire-fighting equipment locations

A comprehensive emergency plan includes evacuation routes and procedures, assembly points, first aid facilities, emergency contacts, and locations of safety equipment.

Question 16: What is 'made ground' and why does it present increased risk during excavation?

Previously disturbed or filled ground that may contain unknown voids, contamination, or unstable material (Correct answer)
Ground that has been tested and certified safe
Compacted bedrock that is hard to excavate
Naturally occurring gravel that drains well

Correct answer: Previously disturbed or filled ground that may contain unknown voids, contamination, or unstable material

Made ground consists of previously disturbed or deposited material that may contain unexpected voids, contamination, buried objects, or variable stability, making it more hazardous to excavate than undisturbed natural ground.

Question 17: Which of the following is a collective protection measure for work at height?

Edge protection including guard rails and toe boards (Correct answer)
A non-slip boot sole
A safety harness and lanyard
A hard hat

Correct answer: Edge protection including guard rails and toe boards

Collective protection measures protect everyone in the area without requiring individual action — guard rails and toe boards are collective measures that reduce fall risk for all workers automatically.

Question 18: Which Approved Document covers the structural stability requirements for walls, floors, and roofs?

Approved Document D
Approved Document B
Approved Document C
Approved Document A (Correct answer)

Correct answer: Approved Document A

Approved Document A (Structure) covers structural stability requirements including the design of walls, floors, and roofs.

Question 19: Which roofing system uses a continuous membrane adhered or mechanically fastened to the roof deck?

Single-ply membrane (TPO/EPDM) (Correct answer)
Metal standing seam
Asphalt shingle
Built-up roofing (BUR)

Correct answer: Single-ply membrane (TPO/EPDM)

Single-ply membrane systems like TPO and EPDM consist of a single continuous sheet installed over the roof deck, either adhered, ballasted, or mechanically fastened.

Question 20: What is the purpose of safety induction training on a construction site?

To distribute uniforms
To assign parking spaces
To inform new workers about site-specific hazards, rules, and emergency procedures before they start work (Correct answer)
To welcome workers socially

Correct answer: To inform new workers about site-specific hazards, rules, and emergency procedures before they start work

Safety induction ensures all workers understand the specific hazards, safety rules, emergency procedures, and site layout before beginning work.

Question 21: What ventilation rate (air changes per hour) is typically required for a commercial restroom?

2 ACH
6 ACH (Correct answer)
25 ACH
15 ACH

Correct answer: 6 ACH

ASHRAE guidelines typically require approximately 6 air changes per hour (ACH) for commercial restrooms.

Question 22: What safety devices should be fitted to mobile plant?

Reversing alarms, mirrors, cameras, flashing beacons, and seatbelts (Correct answer)
Only mirrors
No safety devices are required
Only a horn

Correct answer: Reversing alarms, mirrors, cameras, flashing beacons, and seatbelts

Mobile plant should have multiple safety devices including reversing alarms, mirrors, cameras, rotating beacons, and seatbelts to protect operators and nearby workers.

Question 23: What is the hierarchy of controls in construction safety?

Training only
There is no established hierarchy
PPE first, then everything else
Elimination, substitution, engineering controls, administrative controls, PPE (Correct answer)

Correct answer: Elimination, substitution, engineering controls, administrative controls, PPE

The hierarchy ranks controls from most to least effective: eliminating the hazard entirely, substituting safer alternatives, engineering solutions, administrative procedures, and PPE as the last resort.

Question 24: What is the purpose of a daily defect report for construction plant?

To record any defects or issues found during pre-use checks so they can be addressed (Correct answer)
To record working hours for payroll
To track fuel consumption
To maintain a maintenance log for warranty purposes

Correct answer: To record any defects or issues found during pre-use checks so they can be addressed

Daily defect reports document any issues found during inspections, ensuring they are communicated to management and addressed before the equipment is used.

Question 25: What is the primary purpose of a vapor barrier in wall construction?

To increase structural strength
To improve fire resistance
To reduce sound transmission
To prevent moisture migration into insulation and framing (Correct answer)

Correct answer: To prevent moisture migration into insulation and framing

A vapor barrier prevents moisture-laden air from migrating into wall cavities, protecting insulation and framing from condensation damage.

Question 26: Which fall protection system physically stops a worker from falling by connecting them to an anchor point via a lanyard and harness?

Warning line system
Safety net system
Guardrail system
Personal fall arrest system (PFAS) (Correct answer)

Correct answer: Personal fall arrest system (PFAS)

A personal fall arrest system (harness, lanyard, anchor) arrests a fall in progress, stopping the worker before they reach a lower level.

Question 27: What is a COSHH assessment in construction?

Certificate of Safety and Health
Construction Operations Safety and Health Handbook
Control of Substances Hazardous to Health - an assessment of chemical and substance risks (Correct answer)
Cost of Safety and Health Handbook

Correct answer: Control of Substances Hazardous to Health - an assessment of chemical and substance risks

COSHH assessments evaluate the risks of working with hazardous substances like dust, chemicals, and fumes, and determine appropriate protective measures.

Question 28: What should a worker do if they witness an unsafe act or condition on a construction site?

Wait until the end of the shift to report
Report it to their supervisor or site safety officer (Correct answer)
Attempt to correct it themselves without reporting
Ignore it if it does not seem critical

Correct answer: Report it to their supervisor or site safety officer

If a worker witnesses an unsafe act or condition, it is crucial to report it immediately to their supervisor or the site safety officer. This ensures that the issue is formally documented and addressed by the appropriate personnel who have the authority and expertise to implement corrective actions. Reporting fosters a proactive safety culture and prevents potential accidents or injuries to themselves or others.

Question 29: In structural steel fabrication, what does 'camber' refer to?

The thickness tolerance of the flange plate
The angle of a beam's web relative to its flanges
A deliberate upward pre-bend in a beam to offset anticipated deflection under load (Correct answer)
The welding process used to join sections

Correct answer: A deliberate upward pre-bend in a beam to offset anticipated deflection under load

Camber is an intentional upward curvature built into steel beams during fabrication so that once dead loads are applied, the beam deflects to a level position.

Question 30: Which environmental impact is directly associated with improper management of concrete washout water on a construction site?

Soil and water contamination from high pH runoff (Correct answer)
Increased heat island effect
Increased carbon dioxide emissions
Noise pollution in surrounding neighborhoods

Correct answer: Soil and water contamination from high pH runoff

Concrete washout water is highly alkaline (pH 12+) and can contaminate soil and waterways, killing aquatic life if not contained properly.

Question 31: In concrete formwork design, what is the primary factor determining the lateral pressure exerted on vertical forms?

The rate of concrete placement and concrete unit weight (Correct answer)
The type of aggregate used
The number of form ties installed
The temperature of the water used in the mix

Correct answer: The rate of concrete placement and concrete unit weight

Lateral pressure on formwork increases with faster pour rates and higher concrete unit weight, as the fluid concrete acts hydrostatically before it sets.

Question 32: Which foundation type is best suited for supporting a heavy structure over deep soft soils that cannot support spread footings?

Mat (raft) foundation
Spread footings with grade beams
Cantilever retaining wall
Deep pile foundation (Correct answer)

Correct answer: Deep pile foundation

Deep pile foundations transfer structural loads down through weak upper soils to competent bearing strata at depth, either by end-bearing on rock or friction along the pile shaft.

Question 33: During project closure on a construction site, what is the key purpose of a 'lessons learned' document?

To document outstanding defects for the client's snagging list
To provide a final report to regulatory authorities
To capture successes and failures that can improve future project performance (Correct answer)
To formally release the project team from their contracts

Correct answer: To capture successes and failures that can improve future project performance

Lessons learned documentation records what worked well and what did not, providing valuable knowledge to improve the delivery of future projects.

Question 34: What does the acronym CPM stand for in construction scheduling?

Cost Per Milestone
Contractor Project Management
Construction Project Memorandum
Critical Path Method (Correct answer)

Correct answer: Critical Path Method

The Critical Path Method (CPM) is a scheduling technique that identifies the sequence of tasks determining the shortest project duration.

Question 35: Which Approved Document provides guidance on protection against moisture from the ground, rain, and interstitial condensation?

Approved Document C (Correct answer)
Approved Document B
Approved Document E
Approved Document F

Correct answer: Approved Document C

Approved Document C (Site Preparation and Resistance to Contaminants and Moisture) covers protection against moisture from ground, rain, and condensation.

Question 36: Under Approved Document M (Access to and Use of Buildings), what minimum clear door opening width is required for new dwellings to allow wheelchair access?

750mm
900mm
650mm
775mm (Correct answer)

Correct answer: 775mm

Approved Document M requires a minimum 775mm clear opening width for doors in new dwellings to facilitate wheelchair access.

Question 37: Which fall protection system absorbs the energy of a fall to reduce forces on the user's body?

Fall arrest system with shock-absorbing lanyard (Correct answer)
Work positioning system
Rope access system
Work restraint system

Correct answer: Fall arrest system with shock-absorbing lanyard

A fall arrest system allows a fall to begin but arrests it before the worker hits a lower level; shock-absorbing lanyards reduce peak deceleration forces, preventing injury from the sudden stop.

Question 38: What is the minimum safe distance from the edge of an excavation that spoil should be placed to prevent collapse?

1 meter (Correct answer)
0.5 meters
2 meters
3 meters

Correct answer: 1 meter

Spoil and materials must be kept at least 1 meter from the edge of an excavation to reduce surcharge loading that could cause the sides to collapse.

Question 39: What is the primary purpose of a Job Hazard Analysis (JHA) on a construction site?

To assign blame after an accident
To satisfy insurance requirements only
To calculate project costs
To identify hazards before work begins and establish safe procedures (Correct answer)

Correct answer: To identify hazards before work begins and establish safe procedures

A JHA breaks each job task into steps to identify potential hazards and determine appropriate safety controls before work starts.

Question 40: When working in a confined space on a construction site, which of the following is a required safety measure?

A written permit must be issued before entry (Correct answer)
Workers must carry a fire extinguisher at all times
A minimum of two workers must always enter together
The space must be at least 10 feet in diameter

Correct answer: A written permit must be issued before entry

OSHA's permit-required confined space standard mandates that a written entry permit be issued and followed before workers enter.

Question 41: What should you do if you discover an unsafe condition on a construction site?

Report it immediately to your supervisor and take steps to warn others of the danger (Correct answer)
Fix it yourself regardless of training
Ignore it and continue working
Wait until the end of the day to report it

Correct answer: Report it immediately to your supervisor and take steps to warn others of the danger

Unsafe conditions must be reported immediately to prevent accidents. Workers should also warn others of the danger if possible.

Question 42: Which type of excavation support uses hydraulic or mechanical jacks to push steel or aluminum plates against trench walls?

Timber close boarding
Trench box (drag box)
Sheet piling
Hydraulic trench strut system (Correct answer)

Correct answer: Hydraulic trench strut system

Hydraulic trench strut systems use adjustable struts or props fitted with spreader plates to apply outward pressure against the trench walls, providing adjustable and efficient lateral support.

Question 43: What is the legal requirement for accident reporting on construction sites?

Only the insurance company needs to be notified
No reporting is required
Serious accidents, dangerous occurrences, and certain injuries must be reported to the relevant authority under RIDDOR (Correct answer)
Only fatal accidents need reporting

Correct answer: Serious accidents, dangerous occurrences, and certain injuries must be reported to the relevant authority under RIDDOR

RIDDOR (Reporting of Injuries, Diseases and Dangerous Occurrences Regulations) requires employers to report certain workplace accidents and incidents.

Question 44: What color are gas pipes typically marked in the UK for identification purposes?

Green
Blue
Yellow (Correct answer)
Red

Correct answer: Yellow

Gas pipes in the UK are identified by yellow coloring or yellow marker tape, helping excavation workers recognize and avoid striking gas supply pipes.

Question 45: What record must be kept following every formal inspection of an excavation?

A verbal report to the site supervisor
A written inspection report (Form F91) (Correct answer)
An entry in the site visitor book
A photographic log only

Correct answer: A written inspection report (Form F91)

Regulation 33 of CDM 2015 requires that a written report, often on Form F91, is completed by the competent person following each formal excavation inspection and kept on site.

Question 46: What are the main causes of fatal accidents in construction?

Cold temperatures
Falls from height, being struck by moving vehicles, and being struck by falling objects (Correct answer)
Noise exposure
Sunburn

Correct answer: Falls from height, being struck by moving vehicles, and being struck by falling objects

The leading causes of construction fatalities are falls from height, vehicle strikes, and being hit by falling objects, which is why these hazards receive the most attention.

Question 47: When should a ladder be used for work at height?

For all external work on buildings below five storeys
Only when the risk assessment shows it is the most suitable equipment for a low-risk, short-duration task (Correct answer)
For any task lasting up to one hour
Whenever scaffolding would take too long to erect

Correct answer: Only when the risk assessment shows it is the most suitable equipment for a low-risk, short-duration task

Ladders should only be used when a risk assessment shows they are the most appropriate equipment — they are not a default choice, particularly for anything other than short-duration, low-risk tasks.

Question 48: What is the primary hazard when cutting cast-iron pipe on a construction site?

Carbon monoxide
Electric shock
Asbestos exposure
Sharp metal shards and dust (Correct answer)

Correct answer: Sharp metal shards and dust

Cutting cast-iron pipe generates sharp metal fragments and iron dust that can cause cuts and respiratory irritation.

Question 49: What is the main function of a structural steel frame in a building?

To act as a barrier against environmental elements
To support and transfer loads from the building to the foundation (Correct answer)
To provide insulation and soundproofing
To enhance the aesthetic appearance of the building

Correct answer: To support and transfer loads from the building to the foundation

The main function of a structural steel frame in a building is to provide the primary support system. It is designed to carry and transfer all the various loads acting on the building, such as dead loads (weight of the building itself), live loads (occupants, furniture), and environmental loads (wind, snow), down to the building's foundation. This ensures the stability and integrity of the entire structure.

Question 50: What is a permit-to-work system?

A system for requesting time off
A construction work permit from the city
A parking permit for the site
A formal written procedure for controlling high-risk activities like hot work, confined spaces, or electrical work (Correct answer)

Correct answer: A formal written procedure for controlling high-risk activities like hot work, confined spaces, or electrical work

Permit-to-work is a formal safety system that ensures high-risk activities are properly planned, authorized, and controlled with appropriate safeguards.

CITB Health, Safety and Environment (HSE) Test

The CITB Health, Safety and Environment test assesses knowledge of health, safety, and environmental practices required to work safely on UK construction sites, covering legal requirements, occupational health, general safety, high-risk activities, and environmental responsibilities.

Questions

45 min

Time Limit

90%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds