NCIDQ Interior Design Fundamentals Exam (IDFX) — Questions and Answers

Question 1: Which drawing type in a set of construction documents typically shows wall types, room names, and door/window locations in plan view?

Elevation drawing
Section drawing
Floor plan (Correct answer)
Reflected ceiling plan

Correct answer: Floor plan

Floor plans are the primary horizontal cut drawings showing room layout, partition locations, door swings, and fixture placement at approximately 4 feet above finish floor.

Question 2: The interior designer should make recommendations to clients who want to choose the best contractor for a project at the best price and exclude potentially unqualified firms.

An advertisement to bid
A negotiated contract
An invitation to bid
Prequalification of bidders (Correct answer)

Correct answer: Prequalification of bidders

Prequalification is the procedure by which the Employer determines if a firm is qualified to carry out a certain contract before inviting it to submit a bid.

Question 3: Under the ADA, what is the minimum clear floor space required at a wheelchair-accessible lavatory?

36 inches wide by 42 inches deep
30 inches wide by 48 inches deep (Correct answer)
32 inches wide by 44 inches deep
24 inches wide by 36 inches deep

Correct answer: 30 inches wide by 48 inches deep

ADA Standards require a 30-inch by 48-inch clear floor space for a forward or parallel approach at accessible lavatories.

Question 4: A designer is working on a healthcare facility. Which ASHRAE standard governs ventilation and indoor air quality requirements for that building type?

ASHRAE 90.1
ASHRAE 170 (Correct answer)
ASHRAE 55
ASHRAE 62.2

Correct answer: ASHRAE 170

ASHRAE Standard 170 specifically governs ventilation of health care facilities, setting minimum air change rates and filtration requirements for patient areas.

Question 5: What does 'errors and omissions (E&O) insurance' protect an interior designer against?

Claims arising from professional mistakes or failure to perform professional duties (Correct answer)
Workers' compensation for studio employees
Damage to a client's property during a site visit
Theft of project files or equipment

Correct answer: Claims arising from professional mistakes or failure to perform professional duties

E&O insurance (also called professional liability insurance) covers claims that the designer's professional services caused financial harm due to errors, omissions, or negligence.

Question 6: Which model building code is most widely adopted by states for commercial interior construction in the US?

International Building Code (IBC) (Correct answer)
NFPA 101 Life Safety Code only
Uniform Building Code (UBC)
Standard Building Code (SBC)

Correct answer: International Building Code (IBC)

The International Building Code (IBC), published by the International Code Council, is the most widely adopted model code for commercial construction across US states.

Question 7: Which flooring material is rated by the Coefficient of Friction (COF) for slip resistance?

Hardwood flooring only
Carpet tile only
Ceramic and porcelain tile (Correct answer)
Luxury vinyl plank only

Correct answer: Ceramic and porcelain tile

Ceramic and porcelain tile are commonly rated by static and dynamic Coefficient of Friction (COF) to ensure adequate slip resistance, especially in wet areas.

Question 8: A client wants a commercial lobby with flooring that meets ADA standards. What is the maximum allowable slope for a floor surface that is not a ramp?

1:100
1:50
1:20 (Correct answer)
1:10

Correct answer: 1:20

ADA standards require that floor surfaces have a maximum slope of 1:20 (1/2 inch per foot) to be considered level and accessible.

Question 9: What is the role of an interior designer during the 'construction administration' (CA) phase?

Observing construction, reviewing submittals, responding to RFIs, and certifying payment applications on behalf of the owner (Correct answer)
Managing the construction schedule and enforcing the contractor's timeline
Directly supervising all contractor labor and equipment
Purchasing all furniture and equipment for the project

Correct answer: Observing construction, reviewing submittals, responding to RFIs, and certifying payment applications on behalf of the owner

During CA, the designer acts as the owner's representative by visiting the site, reviewing submittals, answering contractor Requests for Information (RFIs), and certifying that work conforms to the contract documents.

Question 10: A 'finish schedule' in construction documents is used primarily to:

Document punch-list items at project closeout
Specify the contractor's payment milestones
Indicate the finishes applied to floors, walls, and ceilings in each room (Correct answer)
List the project timeline for finish installation

Correct answer: Indicate the finishes applied to floors, walls, and ceilings in each room

A finish schedule is a chart cross-referencing room numbers with specified floor, base, wall, and ceiling materials and finishes.

Question 11: Which ergonomic principle describes designing for the range between the 5th and 95th percentile of users?

Inclusive design range
Barrier-free adjustment
Universal Design
Anthropometric accommodation (Correct answer)

Correct answer: Anthropometric accommodation

Anthropometric accommodation targeting the 5th–95th percentile ensures a design fits the vast majority of users without being extreme for any group.

Question 12: A designer is selecting flooring for a commercial kitchen. Which installation system is most critical for hygiene compliance?

Click-lock porcelain tile
Floating installation with foam underlayment
Glue-down luxury vinyl tile
Epoxy mortar bed with coved base (Correct answer)

Correct answer: Epoxy mortar bed with coved base

An epoxy mortar bed with an integral coved base creates a seamless, waterproof, and cleanable surface required for commercial kitchen health codes.

Question 13: Which organization publishes the Life Safety Code used widely in interior design practice?

ASHRAE
NFPA (Correct answer)
ICC
USGBC

Correct answer: NFPA

The National Fire Protection Association (NFPA) publishes NFPA 101, the Life Safety Code, which governs occupant safety in buildings.

Question 14: In a finish schedule, what does 'PT-1' typically represent?

A wood stain protection formula
A paint type and color designation (Correct answer)
A performance test classification
A porcelain tile product number

Correct answer: A paint type and color designation

In a finish schedule, designations like PT-1 identify specific paint specifications including sheen level, color, and manufacturer for application to defined surfaces.

Question 15: Who could make a quick sketch perspective drawing the easiest?

Plotting the perspective
Tracing over a model photograph
Employing a computer model
Using a perspective grid (Correct answer)

Correct answer: Using a perspective grid

This tool is quite helpful when designing because it enables you to put any design, shape, or text into perspective. Being able to use and comprehend this tool increases your value as a graphic designer, and using it is fantastic.

Question 16: Which type of adhesive-backed flooring installation method is recommended for areas with radiant floor heating?

Floating installation (Correct answer)
Double-stick tape installation
Nailed-down installation
Fully adhered installation using pressure-sensitive adhesive

Correct answer: Floating installation

Floating installation allows the flooring to expand and contract with temperature changes from radiant heat without adhesive bond failure.

Question 17: What is the primary purpose of a 'door schedule' in construction documents?

Noting acoustic requirements for each door opening
Tabulating each door's size, type, material, hardware set, and fire rating in one document (Correct answer)
Scheduling the delivery dates of door materials
Listing the sequence in which doors are installed

Correct answer: Tabulating each door's size, type, material, hardware set, and fire rating in one document

A door schedule is a table that catalogs every door by number, cross-referencing its dimensions, construction type, finish, frame type, fire rating, and hardware group.

Question 18: What is an 'addendum' in the context of a bidding set of construction documents?

A supplementary drawing added after construction begins
A substitution request from a contractor
A post-contract change to the scope of work
A written modification to the bid documents issued during the bidding period before bids are submitted (Correct answer)

Correct answer: A written modification to the bid documents issued during the bidding period before bids are submitted

An addendum is a formal written modification or clarification to the bidding documents issued to all bidders before bid submission, ensuring all parties bid on the same information.

Question 19: What is the minimum required headroom clearance in a means of egress under IBC?

6 feet 8 inches
7 feet 6 inches (Correct answer)
8 feet 0 inches
7 feet 0 inches

Correct answer: 7 feet 6 inches

IBC Section 1003.2 requires a minimum ceiling height of 7 feet 6 inches throughout the means of egress.

Question 20: Which of the following is NOT factored into a live load calculation?

furniture
building components (Correct answer)
people
movable equipment

Correct answer: building components

The live load calculation excludes building components. The sum of the living and dead loads determines the building's overall gravity load. The main difference between these loads is that the live load's components can be relocated, but the dead load's components cannot. Movable items, furniture, and people are all included in the live load. The building's structural elements and mobile equipment are all included in the dead load.

Question 21: Which IBC construction type uses noncombustible materials throughout and has the highest fire-resistance ratings?

Type II
Type I (Correct answer)
Type IV
Type V

Correct answer: Type I

Type I construction (IA and IB) requires noncombustible structural elements with the highest fire-resistance ratings of all construction types.

Question 22: What is the maximum height of a handrail above a stair nosing per IBC requirements?

30 inches
38 inches (Correct answer)
42 inches
34 inches

Correct answer: 38 inches

IBC and ADA require handrails to be between 34 and 38 inches measured vertically from the stair nosing, with 38 inches as the maximum.

Question 23: In ergonomics, the standard seated desk height for most adults in the US is approximately:

32 to 34 inches
24 to 26 inches
27 to 29 inches
28 to 30 inches (Correct answer)

Correct answer: 28 to 30 inches

Standard desk height in the US is typically 28 to 30 inches, designed to accommodate a range of adult users in a seated position.

Question 24: Which professional organization accredits interior design education programs in North America?

NCIDQ
IIDA
CIDA (Council for Interior Design Accreditation) (Correct answer)
ASID

Correct answer: CIDA (Council for Interior Design Accreditation)

CIDA (Council for Interior Design Accreditation) sets standards for and accredits interior design degree programs at colleges and universities in North America.

Question 25: Which fire-protection system uses heat-sensitive bulbs or links to release water only at the sprinkler heads nearest to a fire?

Pre-action system
Dry-pipe system
Wet-pipe system (Correct answer)
Deluge system

Correct answer: Wet-pipe system

A wet-pipe sprinkler system keeps water in the pipes at all times, and individual heads activate when heat melts their fusible element.

Question 26: What is the IDEP (Interior Design Experience Program) administered by NCIDQ?

A mentorship program pairing students with licensed designers
An online portfolio review system for NCIDQ candidates
A structured program for logging and verifying qualifying work experience hours toward NCIDQ eligibility (Correct answer)
A continuing education platform for licensed designers

Correct answer: A structured program for logging and verifying qualifying work experience hours toward NCIDQ eligibility

IDEP is NCIDQ's online system for candidates to document, categorize, and submit qualifying interior design work experience hours under licensed professional supervision.

Question 27: What is the primary purpose of a shop drawing submitted by a contractor during the construction phase?

To propose design changes to the owner
To verify the contractor's interpretation of the construction documents (Correct answer)
To authorize payment for completed work
To document as-built conditions

Correct answer: To verify the contractor's interpretation of the construction documents

Shop drawings show how the contractor or fabricator plans to construct or fabricate a specific element, allowing the designer to verify it matches the design intent.

Question 28: Under IBC, what is the minimum corridor width required for occupancies other than residential and Group I?

36 inches
48 inches
60 inches
44 inches (Correct answer)

Correct answer: 44 inches

The IBC requires a minimum corridor width of 44 inches for most occupancies to ensure safe egress.

Question 29: Which drawing type shows the interior surfaces of a room unfolded into a single flat plane, useful for coordinating finishes and details across all four walls?

Interior perspective
Finish plan
Interior elevation (Correct answer)
Section drawing

Correct answer: Interior elevation

Interior elevations are orthographic drawings of each wall surface within a room, allowing designers to coordinate heights, materials, and millwork details.

Question 30: What is the required clear floor space beside a wheelchair-accessible toilet for a side transfer approach?

30 × 48 inches
60 × 56 inches (Correct answer)
60 × 60 inches
36 × 48 inches

Correct answer: 60 × 56 inches

ADA requires a 60-inch minimum width and 56-inch minimum depth clear floor space for a side transfer approach to a water closet.

Question 31: Per NFPA 101 (Life Safety Code), emergency egress lighting must remain operational for a minimum of how long after a power failure?

1 hour
2 hours
30 minutes
1.5 hours (Correct answer)

Correct answer: 1.5 hours

NFPA 101 requires emergency egress lighting to provide a minimum of 1.5 hours of illumination at required levels following loss of normal power.

Question 32: Footcandles (fc) are used to measure which lighting quantity?

Illuminance on a surface (Correct answer)
Luminous efficacy of a system
Light output of a lamp
Luminous intensity of a fixture

Correct answer: Illuminance on a surface

Footcandles measure illuminance—the amount of light falling on a surface—where one footcandle equals one lumen per square foot.

Question 33: Which of the following typical health risks is NOT a component of building materials?

asbestos
radon (Correct answer)
polychlorinated biphenyls
vermiculite

Correct answer: radon

There is no radon in building supplies. Instead, the soil, rock, and water in the vicinity contain this prevalent health risk. Because it is a proven carcinogen, inhaling it poses a particular risk.

Question 34: What is the definition of glare in interior lighting design?

The reflection of light off polished floor surfaces
The total lumen output of all fixtures in a space
The color shift of lamps as they age
Excessive or uncontrolled brightness causing visual discomfort or reduced visibility (Correct answer)

Correct answer: Excessive or uncontrolled brightness causing visual discomfort or reduced visibility

Glare is defined as excessive brightness within the visual field that causes discomfort, annoyance, or impaired visibility compared to the adapted luminance level.

Question 35: In a furniture plan, the typical scale used for residential projects to show adequate detail is:

1/4" = 1'-0" (Correct answer)
1/16" = 1'-0"
1/8" = 1'-0"
1/2" = 1'-0"

Correct answer: 1/4" = 1'-0"

1/4" = 1'-0" is the standard residential floor plan scale, balancing detail with sheet size.

Question 36: A designer discovers during construction administration that a contractor's work does not conform to the construction documents. What is the designer's appropriate first action?

Issue a change order to accept the deviation
Terminate the contractor's contract
Instruct the contractor verbally to stop work immediately
Notify the owner and issue a written nonconformance notice (Correct answer)

Correct answer: Notify the owner and issue a written nonconformance notice

The designer should notify the owner and issue a written nonconformance notice to create a formal record and initiate corrective action through proper channels.

Question 37: What kind of cabinet door has an overlapped frame that conceals the joint?

flush
flush overlay
lipped overlay (Correct answer)
reveal overlay

Correct answer: lipped overlay

The door of a lipped overlay cabinet overlaps the frame to conceal the junction. The door overhang the front of the frame in a flush overlay. The adjacent doors in a reveal overlay are not too close together to conceal the frame in between them. A flush cabinet door has a same depth between the door and the frame.

Question 38: What is the maximum allowable smoke developed index (SDI) for Class A interior finish materials?

600
450 (Correct answer)
200
50

Correct answer: 450

ASTM E84 classifies interior finish materials: Class A allows a maximum flame spread index of 25 and a maximum smoke developed index of 450.

Question 39: Under ASID's Code of Ethics, what obligation does an interior designer have when a conflict of interest arises?

Decline any compensation related to the conflicting interest
Report the conflict to the state licensing board
Disclose the conflict to affected parties and obtain their consent before proceeding (Correct answer)
Withdraw from the project immediately

Correct answer: Disclose the conflict to affected parties and obtain their consent before proceeding

ASID's Code of Ethics requires members to fully disclose any actual or potential conflict of interest to clients and obtain written consent before continuing with services.

Question 40: What is the primary purpose of a reflected ceiling plan (RCP)?

To show the layout of flooring materials
To depict structural beams from above
To document exterior elevation details
To illustrate ceiling elements as if reflected onto the floor plane (Correct answer)

Correct answer: To illustrate ceiling elements as if reflected onto the floor plane

An RCP shows ceiling features—lighting, HVAC diffusers, soffits—as they would appear reflected onto the floor, viewed from above.

Question 41: A healthcare facility is being designed to ANSI/ASHRAE/ASHE Standard 170. Which primary concern does this standard address?

Acoustic performance
Emergency lighting
Ventilation of healthcare facilities (Correct answer)
Plumbing fixture counts

Correct answer: Ventilation of healthcare facilities

ANSI/ASHRAE/ASHE Standard 170 specifically governs ventilation requirements for healthcare environments including air changes and pressure relationships.

Question 42: What is the purpose of an occupancy separation (fire barrier) between two different occupancy groups in the same building?

To contain fire and smoke within one occupancy and protect the adjacent occupancy (Correct answer)
To separate HVAC zones for energy efficiency
To mark property boundaries within a multi-tenant building
To provide acoustic separation between uses

Correct answer: To contain fire and smoke within one occupancy and protect the adjacent occupancy

Occupancy separations are fire barriers rated for specific hourly durations that prevent fire and smoke from spreading from one occupancy type to another.

Question 43: Which billing method charges the client a fixed dollar amount for all services regardless of actual hours worked?

Lump sum (fixed fee) (Correct answer)
Cost plus percentage
Hourly rate
Percentage of construction cost

Correct answer: Lump sum (fixed fee)

A lump sum or fixed fee contract establishes a single all-inclusive price for the defined scope of services, providing budget certainty for the client and rewarding design efficiency.

Question 44: Which metric is used to evaluate the efficiency of an office floor plan?

Total perimeter length
Number of conference rooms
Height of partitions
Usable area per workstation (Correct answer)

Correct answer: Usable area per workstation

Usable area per workstation (or per person) benchmarks how efficiently the floor plate is utilized relative to the number of occupants.

Question 45: Which material standard applies to hardwood veneer plywood used in casework and millwork?

HPVA HP-1 (Hardwood Plywood and Veneer Association) (Correct answer)
ASTM C1185
AWI Quality Standards Section 100
ANSI A208.1

Correct answer: HPVA HP-1 (Hardwood Plywood and Veneer Association)

HPVA HP-1 is the industry standard for hardwood and decorative plywood, covering veneer grades, core types, and tolerances used in architectural millwork.

Question 46: Which document establishes the legal relationship and scope of services between a designer and client?

Owner-designer agreement (Correct answer)
Request for proposal
Letter of intent
Project program

Correct answer: Owner-designer agreement

The owner-designer agreement (contract) is the legally binding document defining services, fees, responsibilities, and project parameters.

Question 47: What should you use while making drawings that will be used in magazines?

An architect’s scale
An engineer’s scale
A graphic scale (Correct answer)
A metric scale

Correct answer: A graphic scale

A graphic scale is a bar with segments labeled with the distances the segments represent and marked off like a ruler. With this kind of scale, you would use a ruler to measure distance just as you would with a written or verbal scale.

Question 48: Under the IBC, which occupancy classification typically applies to a general business office?

Group A-2
Group S-1
Group M
Group B (Correct answer)

Correct answer: Group B

Group B (Business) occupancy covers offices, professional services, and similar uses under IBC Chapter 3.

Question 49: What distinguishes a partition that is 'demising' from a standard interior partition?

A demising wall must be constructed of masonry only
A demising wall is non-load-bearing, while a standard partition can be structural
A demising wall separates tenant spaces and typically requires enhanced fire and sound ratings (Correct answer)
A demising wall is a temporary partition used during construction

Correct answer: A demising wall separates tenant spaces and typically requires enhanced fire and sound ratings

A demising wall is the legal and physical boundary between two tenant spaces and is typically required to meet higher fire-resistance and sound-isolation standards.

Question 50: What does 'due diligence' mean in the context of selecting a site or existing building for a design project?

Confirming the client has obtained project financing
Thoroughly researching existing conditions, code compliance issues, structural limitations, and legal encumbrances before committing to a design program (Correct answer)
Checking that all specified products meet sustainability certifications
Verifying the contractor's insurance and bonding before award

Correct answer: Thoroughly researching existing conditions, code compliance issues, structural limitations, and legal encumbrances before committing to a design program

Due diligence involves systematically investigating site conditions, zoning, code constraints, existing MEP systems, and title issues to identify risks and constraints before the design process begins.

Question 51: What does the term 'wall washing' describe in interior lighting design?

Cleaning luminaire lenses to maintain output
Using colored filters to tint wall surfaces
Directing light upward to reflect off the ceiling
Evenly illuminating a vertical wall surface from top to bottom (Correct answer)

Correct answer: Evenly illuminating a vertical wall surface from top to bottom

Wall washing uses fixtures positioned to distribute light evenly across an entire vertical wall surface, creating a bright, uniform glow that makes the space feel larger.

Question 52: Which federal law is the primary accessibility standard for commercial facilities in the United States?

Rehabilitation Act Section 504
Architectural Barriers Act
Fair Housing Act
Americans with Disabilities Act (ADA) (Correct answer)

Correct answer: Americans with Disabilities Act (ADA)

The Americans with Disabilities Act (ADA) and its 2010 ADA Standards for Accessible Design govern accessibility in commercial facilities.

Question 53: What is the primary purpose of a Letter of Agreement (LOA) or Owner-Designer contract?

To authorize the contractor to begin construction
To document the programming phase findings
To define scope of services, compensation, schedule, and responsibilities between designer and client (Correct answer)
To apply for a building permit

Correct answer: To define scope of services, compensation, schedule, and responsibilities between designer and client

A design contract (LOA or AIA Owner-Designer Agreement) legally establishes the scope of services, fee structure, schedule, deliverables, and the rights and obligations of both parties.

Question 54: What is the primary purpose of a 'test fit' in commercial interior programming?

Verifying the program fits within the available floor plate (Correct answer)
Confirming fire suppression coverage
Testing acoustic performance of partitions
Checking furniture finishes under project lighting

Correct answer: Verifying the program fits within the available floor plate

A test fit is a quick schematic layout used to confirm that the programmed square footage and key spaces will fit within a candidate leased floor plate.

Question 55: A designer specifies carpet with a static electricity rating of 3.5 kV. Which environment is this specification most critical for?

Healthcare operating room or data center (Correct answer)
Hotel ballroom
Residential living room
Retail clothing store

Correct answer: Healthcare operating room or data center

Static electricity control is critical in environments with sensitive electronic equipment (data centers) or where static discharge could ignite gases or damage equipment, such as healthcare and IT spaces.

Question 56: What is the purpose of 'record drawings' (as-builts) at the end of a construction project?

To create a final rendering of the completed space
To record the contractor's time logs during construction
To document actual conditions as built, reflecting all field changes from the original construction documents (Correct answer)
To summarize the project budget versus actual costs

Correct answer: To document actual conditions as built, reflecting all field changes from the original construction documents

Record drawings capture all field changes, substitutions, and as-installed conditions, providing the owner with an accurate document of what was actually constructed.

Question 57: The name for a step's horizontal component is the?

riser.
landing.
nosing.
tread. (Correct answer)

Correct answer: tread.

The tread of a step is its horizontal portion. The foot is positioned on this portion of the step. The area between two flights of steps is known as a landing. The tread lip known as a nosing extends past the step's riser, which is its vertical portion. A flight is any collection of several risers.

Question 58: Which rating system classifies wall covering performance including abrasion resistance, stain resistance, and tensile strength?

ASTM F793 / CID A-A-1475 Commercial Wallcovering Standard (Correct answer)
AWI Section 400
ANSI/BIFMA X5.5
NFPA 265

Correct answer: ASTM F793 / CID A-A-1475 Commercial Wallcovering Standard

ASTM F793 categorizes commercial wall coverings into Types I, II, and III based on weight and performance properties including scrub-ability, stain resistance, and tear strength.

Question 59: ASHRAE 90.1 establishes energy efficiency requirements for commercial buildings by limiting which lighting metric?

Emergency lighting duration requirements
Minimum CRI for workplaces
Lighting Power Density (LPD) in watts per square foot (Correct answer)
Maximum color temperature for offices

Correct answer: Lighting Power Density (LPD) in watts per square foot

ASHRAE 90.1 sets Lighting Power Density (LPD) limits in watts per square foot for different building and space types to reduce overall energy consumption.

Question 60: What is the primary purpose of a 'reflected ceiling plan' in construction documents?

To document lighting, ceiling materials, and overhead mechanical elements as if looking up (Correct answer)
To illustrate wall elevations reflected horizontally
To show the floor pattern mirrored on the ceiling
To provide a bird's-eye view of furniture arrangement

Correct answer: To document lighting, ceiling materials, and overhead mechanical elements as if looking up

A reflected ceiling plan (RCP) shows what you would see if a mirror on the floor reflected the ceiling, documenting fixtures, soffits, and finishes overhead.

Question 61: What is the recommended minimum turning radius for a wheelchair in an accessible restroom?

48-inch diameter circle
36-inch diameter circle
72-inch diameter circle
60-inch diameter circle (Correct answer)

Correct answer: 60-inch diameter circle

ADA requires a 60-inch (5-foot) diameter clear floor space to allow a wheelchair to complete a full 180-degree turn.

Question 62: What does the Wyzenbeek test measure for upholstery fabric?

Abrasion resistance (durability) (Correct answer)
Tensile strength under load
Colorfastness to light
Flammability in a vertical position

Correct answer: Abrasion resistance (durability)

The Wyzenbeek test measures upholstery fabric abrasion resistance by rubbing a wire mesh back and forth across the fabric and counting double rubs until wear shows.

Question 63: Which carpet specification method describes performance requirements without naming a specific product brand?

Proprietary specification
Base bid with alternate specification
Descriptive specification (Correct answer)
Reference standard specification

Correct answer: Descriptive specification

A descriptive specification defines performance criteria, construction methods, and material properties so any product meeting those standards can be used.

Question 64: Which NCIDQ exam section tests a candidate's ability to apply design knowledge to a realistic project scenario through a timed drawing exercise?

IDPX
PRAC (Correct answer)
IDFX
CIDQ Assessment

Correct answer: PRAC

The PRAC (Practicum) section requires candidates to produce design drawings within a set time, simulating real project conditions.

Question 65: Which countertop material has the highest resistance to heat, scratches, and chemicals in a laboratory or heavy commercial setting?

Epoxy resin (Correct answer)
Laminate (HPDL)
Quartz composite
Solid surface (e.g., Corian)

Correct answer: Epoxy resin

Epoxy resin countertops are standard in laboratories because they resist chemicals, heat up to 350°F, and physical abrasion better than other countertop materials.

Question 66: Which federal law prohibits discrimination in public accommodations and requires accessible design in new construction?

Rehabilitation Act of 1973
Americans with Disabilities Act (ADA) (Correct answer)
Occupational Safety and Health Act
Fair Housing Act

Correct answer: Americans with Disabilities Act (ADA)

Title III of the ADA requires places of public accommodation built for first occupancy after January 26, 1993 to be accessible.

Question 67: What is the minimum interior design experience required to sit for the NCIDQ examination under the education + experience pathway (4-year CIDA-accredited degree)?

5 years (8,800 hours)
1 year (1,760 hours)
2 years (3,520 hours) (Correct answer)
3 years (5,280 hours)

Correct answer: 2 years (3,520 hours)

Candidates with a 4-year CIDA-accredited interior design degree need a minimum of 3,520 hours (2 years) of qualifying work experience before sitting for the NCIDQ exam.

Question 68: What are the three sections of the NCIDQ examination?

Part 1, Part 2, and Part 3
SD, DD, and CD
IDFX, IDPX, and PRAC (Correct answer)
Theory, Practice, and Portfolio

Correct answer: IDFX, IDPX, and PRAC

The NCIDQ exam comprises the Interior Design Fundamentals Exam (IDFX), the Interior Design Professional Experience Exam (IDPX), and the Practicum (PRAC), a design problem.

Question 69: What does 'FSC certified' mean when specifying wood products?

The wood passed structural stress testing
The wood is finished with a fluorosurfactant coating
The wood comes from responsibly managed forests certified by the Forest Stewardship Council (Correct answer)
The wood has been fire-stop treated per code

Correct answer: The wood comes from responsibly managed forests certified by the Forest Stewardship Council

FSC (Forest Stewardship Council) certification verifies that wood products were sourced from forests managed to environmental and social standards, supporting LEED credits.

Question 70: What does an 'Environmental Product Declaration (EPD)' communicate about a building material?

The product's warranty and maintenance schedule
Compliance with indoor air quality emission limits
Quantified environmental impact data across the product's life cycle (Correct answer)
Energy use during manufacturing only

Correct answer: Quantified environmental impact data across the product's life cycle

An EPD is a third-party verified document reporting a product's life-cycle environmental impacts (carbon, energy, water, waste) based on ISO 14044 methodology.

Question 71: Which project delivery method requires the designer to complete full construction documents before a contractor is selected through competitive bidding?

Design-build (DB)
Design-bid-build (DBB) (Correct answer)
Construction manager at risk (CMaR)
Integrated project delivery (IPD)

Correct answer: Design-bid-build (DBB)

In the traditional design-bid-build delivery, the designer completes 100% construction documents, which are then issued for competitive bidding to select a general contractor.

Question 72: Which of the following addenda statements is FALSE?

Addenda are used to modify or interpret the contract documents
An addendum must be issued four or five days before bid opening
An addendum is sent only to the contractor requesting the clarification (Correct answer)
Addenda are only issued before the construction contract is signed

Correct answer: An addendum is sent only to the contractor requesting the clarification

The "An addendum is sent only to the contractor requesting the clarification" statement is not true.

Question 73: The contractors and the? usually attend bid openings.

Interior designer
Subcontractors, owner and interior designer
Owner
Owner and interior designer (Correct answer)

Correct answer: Owner and interior designer

The general contractors, owner, and interior designer are typically in attendance, even though most bid openings are available to anybody who wishes to attend.

Question 74: Which resilient flooring type consists of a photographic layer protected by a clear urethane wear layer?

Linoleum
Sheet vinyl (homogeneous)
Rubber tile
Luxury Vinyl Tile/Plank (LVT/LVP) (Correct answer)

Correct answer: Luxury Vinyl Tile/Plank (LVT/LVP)

LVT/LVP uses a photographic film layer under a urethane wear layer to simulate wood, stone, or tile patterns with high dimensional stability.

Question 75: Who holds ownership to commodities during transit when they are sent FOB destination?

the seller (Correct answer)
none of the above
the carrier
the buyer

Correct answer: the seller

The seller has title to the items while they are in transit when they are transported FOB destination. When a destination is listed as FOB (free on board), it means that ownership of the goods passes from the vendor to the buyer once they reach their destination. On the other side, FOB shipping point means that title is transferred when the items leave the producer.

Question 76: What is the advantage of specifying a 'base bid with alternate' approach in a project?

It requires contractors to use only proprietary products
It allows the owner to compare costs between a standard option and an upgraded or substituted material (Correct answer)
It eliminates the need for product submittals
It guarantees the lowest possible bid price

Correct answer: It allows the owner to compare costs between a standard option and an upgraded or substituted material

A base bid with alternate structure lets the owner receive pricing for the standard design plus optional upgrades, substitutions, or scope additions, enabling informed budget decisions.

Question 77: What is the standard floor-to-floor height assumed for most commercial office interiors?

13 feet (Correct answer)
16 feet
9 feet
8 feet

Correct answer: 13 feet

Commercial office buildings typically have floor-to-floor heights of approximately 13 feet to accommodate structure, mechanical systems, and a finished ceiling.

Question 78: Which phase of FF&E procurement involves issuing competitive bids to vendors for specified furniture items?

Request for Quotation (RFQ) (Correct answer)
Design Development
Punch list review
Schematic selection

Correct answer: Request for Quotation (RFQ)

A Request for Quotation (RFQ) is issued to vendors with detailed specifications so they can provide competitive pricing for FF&E items.

Question 79: Which net-to-gross ratio is most commonly used for estimating total building area from programmed net square footage in office projects?

1.25–1.35 (Correct answer)
1.05–1.10
1.50–1.75
0.80–0.90

Correct answer: 1.25–1.35

A net-to-gross ratio of 1.25–1.35 is typical for office buildings, accounting for circulation, walls, and mechanical areas.

Question 80: Which space planning approach places private offices along interior zones and workstations along the perimeter?

Hoteling layout
Inverted office planning (Correct answer)
Traditional office planning
Activity-based working

Correct answer: Inverted office planning

Inverted office planning moves private offices to the interior so perimeter workstations receive natural light and views.

Question 81: Which fabric test measures resistance to pilling (surface fiber balling) in upholstery textiles?

ASTM D3512 Random Tumble Pilling Test (Correct answer)
NFPA 260 Cigarette Ignition Test
AATCC 16 Colorfastness to Light
ASTM D4966 Martindale Test

Correct answer: ASTM D3512 Random Tumble Pilling Test

The ASTM D3512 random tumble pilling test agitates fabric specimens to evaluate their tendency to form pills (fiber balls) on the surface during use.

Question 82: What is the primary distinction between a 'change order' and a 'construction change directive (CCD)'?

A change order adds scope; a CCD reduces scope
A CCD is used only for furniture changes; a change order covers construction
A change order requires agreement of all parties; a CCD allows the owner to direct changes without contractor agreement when time is critical (Correct answer)
They are the same document with regional naming differences

Correct answer: A change order requires agreement of all parties; a CCD allows the owner to direct changes without contractor agreement when time is critical

A change order is a mutually agreed amendment to the contract; a CCD (AIA document G714) lets the owner direct work to proceed before price agreement is reached, resolving compensation later.

Question 83: What is a 'retainer' in the context of an interior design fee agreement?

The designer's fee for completed construction administration services
An upfront payment securing the designer's services, applied to future invoices (Correct answer)
A percentage markup on furniture purchases
Payment held by the owner until punch list clearance

Correct answer: An upfront payment securing the designer's services, applied to future invoices

A retainer is a deposit paid at the start of a project to secure the designer's availability and commitment; it is typically credited against the first invoice or final fees.

Question 84: Which phase of the design process involves the owner's formal review and approval of the designer's space planning approach before detail design begins?

Programming
Design Development
Construction Documents
Schematic Design (Correct answer)

Correct answer: Schematic Design

Schematic Design is the phase where broad design concepts and space plans are presented to the client for approval before developing details.

Question 85: Which drawing convention uses a symbol with a triangle pointing to a wall to indicate an interior elevation drawing?

Revision cloud
Interior elevation reference bubble (Correct answer)
Detail reference symbol
Door tag

Correct answer: Interior elevation reference bubble

Interior elevation reference bubbles with triangular arrows pointing toward walls indicate that an interior elevation of that wall exists on the referenced sheet and detail number.

Question 86: Which construction drawing shows the whole property as it would appear from above?

mechanical drawing
site plan (Correct answer)
reflected ceiling plan
demolition plan

Correct answer: site plan

Site maps show the structure as it appears from above. The roof, the surrounding area, and any other features inside the property line are often depicted in these drawings. Site drawings could also include the nearby streets and homes. An engineering consultant would find information in a mechanical drawing beneficial, such as comprehensive drawings of air conditioning systems. The ceiling plan's reflection gives an upward perspective, as if a mirror had been placed on the ground. Any design elements mounted in or close to the ceiling are shown in this drawing. Finally, a demolition plan separates the existing structures that will be kept from those that will be demolished.

Question 87: A color temperature of approximately 3000K would best be described as:

Warm white (Correct answer)
Cool white
Neutral white
Daylight

Correct answer: Warm white

3000K falls in the warm white range (2700–3200K), producing a yellowish-white light similar to halogen or incandescent lamps.

Question 88: Which sort of stone flooring may be placed without the need for resin filler?

slate
sandstone
limestone (Correct answer)
granite

Correct answer: limestone

Before being laid, limestone flooring needs to be resin-filled. This is due to limestone's great porousness. The majority of times, this kind of flooring is used outside. The grains can be seen in the igneous rock known as granite. Sandstone is a sedimentary rock that is simple to work with and can be easily cut into thin slabs suitable for flooring. A fine-grained rock with good flooring adaptability is slate.

Question 89: What is a 'Request for Information (RFI)' in construction administration?

A contractor's request to substitute a specified product
A formal written question from the contractor to the designer seeking clarification of the contract documents (Correct answer)
A permit application submitted to the building department
A client's request for a design proposal before contract award

Correct answer: A formal written question from the contractor to the designer seeking clarification of the contract documents

An RFI is a contractor-initiated document requesting clarification or interpretation of drawings, specifications, or site conditions from the designer during construction.

Question 90: In the context of IBC egress requirements, 'occupant load' is used to determine:

The type of HVAC system needed
The number of electrical outlets required
The minimum number and width of exits (Correct answer)
The required ceiling height

Correct answer: The minimum number and width of exits

Occupant load calculations dictate how many exits are required and the minimum width of each exit path.

Question 91: Which organization publishes the AIA Owner-Architect Agreement (B101) commonly used for interior design contracts?

AGC (Associated General Contractors)
NCIDQ
ASID (American Society of Interior Designers)
American Institute of Architects (AIA) (Correct answer)

Correct answer: American Institute of Architects (AIA)

The AIA publishes the B101 Owner-Architect Agreement and other standard contract documents widely used by both architects and interior designers for project contracts.

Question 92: Which kind of carrier offers the general public a service for moving furniture?

common carrier (Correct answer)
contract carrier
public carrier
private carrier

Correct answer: common carrier

A common carrier provides moving services for furniture to the general population. The Uniform Commercial Code classifies common carriers, contract carriers, and private carriers as the three fundamental types of carriers. Any company that offers moving services to the general public is a common carrier. Contract carriers only work with specific corporations. The company whose goods are being shipped owns and runs private carriers.

Question 93: What does a reflected ceiling plan (RCP) show?

A section through the ceiling structure showing joists and beams
A view looking up from below grade
The floor pattern reflected upward for coordination
The ceiling as if reflected in a mirror on the floor, showing lights, HVAC diffusers, and ceiling heights (Correct answer)

Correct answer: The ceiling as if reflected in a mirror on the floor, showing lights, HVAC diffusers, and ceiling heights

An RCP is drawn as though a mirror on the floor reflects the ceiling, showing light fixture locations, diffusers, ceiling grid, soffits, and ceiling heights.

Question 94: In healthcare facility planning, what does the term 'clean-to-soiled' workflow mean?

Designing separate entrances for staff and visitors
Separating paths of sterile supplies from contaminated waste (Correct answer)
Organizing storage by product expiration date
Routing HVAC air from patient rooms to corridors

Correct answer: Separating paths of sterile supplies from contaminated waste

Clean-to-soiled workflow ensures that clean supply routes and soiled/waste routes are physically separated to prevent cross-contamination.

Question 95: What is the standard minimum corridor width required by the IBC for means of egress in a business occupancy?

48 inches
44 inches (Correct answer)
42 inches
36 inches

Correct answer: 44 inches

The IBC requires a minimum 44-inch egress corridor width for most occupancies to allow the passage of two people simultaneously.

Question 96: What is the primary difference between porcelain and ceramic tile from a specification standpoint?

Ceramic is harder and more frost-resistant
Porcelain is always unglazed; ceramic is always glazed
Porcelain has lower water absorption (≤0.5%) and greater density (Correct answer)
Ceramic has a higher COF rating

Correct answer: Porcelain has lower water absorption (≤0.5%) and greater density

Porcelain tile is fired at higher temperatures, producing a denser body with water absorption of ≤0.5%, making it more durable and suitable for exterior or wet applications.

Question 97: What is the IBC-required minimum door width for a means of egress door serving an occupant load over 49?

30 inches clear
36 inches clear
28 inches clear
32 inches clear (Correct answer)

Correct answer: 32 inches clear

IBC requires a minimum 32-inch clear width for egress doors serving occupant loads above 49 persons.

Question 98: Which type of lighting fixture is classified as 'direct/indirect' in its light distribution pattern?

Track head aimed at ceiling
Surface-mounted strip light
Recessed downlight
Pendant with translucent upper and lower diffuser (Correct answer)

Correct answer: Pendant with translucent upper and lower diffuser

A pendant with both an upward-translucent diffuser and a downward diffuser distributes light both up (indirect) and down (direct).

Question 99: During schematic design, the primary deliverable used to confirm a client's spatial needs and adjacency requirements is a:

Punch list
Finish schedule
Construction document set
Bubble diagram or block plan (Correct answer)

Correct answer: Bubble diagram or block plan

Bubble diagrams and block plans illustrate relationships and approximate sizes of spaces to validate the program before detailed design begins.

Question 100: Which contract document establishes the legal relationship, scope of services, and compensation between the interior designer and client?

Specification manual
Owner-designer agreement (Correct answer)
Letter of transmittal
Certificate of substantial completion

Correct answer: Owner-designer agreement

The owner-designer agreement is the binding contract that defines services, fees, and responsibilities.

Question 101: A 'gantt chart' in project management is used by interior designers primarily to:

Track project budget expenditures
Schedule project phases and milestones over time (Correct answer)
Record contractor communications
Document material specifications

Correct answer: Schedule project phases and milestones over time

A Gantt chart is a bar chart that maps project tasks along a timeline, helping designers manage phases and deadlines.

Question 102: In interior design practice, 'value engineering' typically involves:

Preparing fee schedules for professional services
Substituting materials or methods to reduce cost while maintaining performance (Correct answer)
Increasing material quality to exceed the budget
Calculating the resale value of specified furniture

Correct answer: Substituting materials or methods to reduce cost while maintaining performance

Value engineering reviews design decisions to find cost savings by substituting equivalent or lesser-cost alternatives without sacrificing function.

Question 103: What does NCIDQ stand for?

North American Council for Interior Design Qualifications
National Council for Interior Design Qualification (Correct answer)
National Committee for Interior Design and Quality
National Certification Institute for Design Quality

Correct answer: National Council for Interior Design Qualification

NCIDQ stands for National Council for Interior Design Qualification, the organization that administers the NCIDQ examination for interior design licensure.

Question 104: Which lighting metric measures the ability of a light source to render colors accurately compared to natural light?

Lumen output
Footcandle level
Correlated Color Temperature (CCT)
Color Rendering Index (CRI) (Correct answer)

Correct answer: Color Rendering Index (CRI)

The Color Rendering Index (CRI) rates a source from 0–100, with 100 indicating perfect color rendering equivalent to natural daylight.

Question 105: According to ADA guidelines, what is the minimum clear floor space required at a single wheelchair turning space?

60 inches diameter (Correct answer)
36 inches diameter
72 inches diameter
48 inches diameter

Correct answer: 60 inches diameter

ADA requires a minimum 60-inch (5-foot) diameter clear floor space for a wheelchair to complete a 180° or 360° turn.

Question 106: Which term describes the phenomenon where a light source causes visual fatigue by flickering at a frequency that may not be consciously perceived?

Flicker (Correct answer)
Veiling reflection
Stroboscopic effect
Disability glare

Correct answer: Flicker

Flicker refers to rapid, repetitive variation in light output that can cause eyestrain, headaches, and in sensitive individuals may trigger photosensitive responses, even when not consciously noticed.

Question 107: Which activity-based working (ABW) setting is best suited for deep-focus, heads-down individual work?

Collaboration lounge
Team neighborhood
Town-hall open area
Focus room or quiet zone (Correct answer)

Correct answer: Focus room or quiet zone

Focus rooms or quiet zones provide an enclosed or semi-enclosed environment that minimizes distraction for concentrated individual work.

Question 108: The main reference point in the Modulor proportioning system is?

the golden ratio
pi
one meter
the human body (Correct answer)

Correct answer: the human body

The human body serves as the main reference in the Modulor proportioning system. Le Corbusier, a designer, designed this system. The Modulor proportioning technique was developed to inspire architects and designers to make places that are suitable for the dimensions of the human body. Another typical set of proportions used in design is the golden ratio, or A is to B as B is to (A + B).

Question 109: Which lighting technique involves aiming light parallel to a textured wall surface to emphasize its surface relief and texture?

Uplighting
Downlighting
Wall washing
Grazing (Correct answer)

Correct answer: Grazing

Grazing places fixtures very close to a textured surface and directs light at an oblique angle, casting dramatic shadows that accentuate texture and surface relief.

Question 110: What does the term 'scope creep' mean in interior design project management?

Changes to the project schedule during construction
The slow deterioration of project quality due to budget cuts
Delays caused by contractor change orders
Gradual expansion of project scope beyond the original contract without corresponding fee adjustment (Correct answer)

Correct answer: Gradual expansion of project scope beyond the original contract without corresponding fee adjustment

Scope creep occurs when additional work or deliverables are added to a project incrementally without formally amending the contract or adjusting the designer's compensation.

Question 111: In space planning, what does 'blocking' refer to?

Laying out individual workstations
Determining structural column grids
Selecting wall materials for partitions
Assigning departments to zones before detailed layout (Correct answer)

Correct answer: Assigning departments to zones before detailed layout

Blocking assigns broad departmental zones to areas of the floor plate before detailed furniture layout begins.

Question 112: Which lighting control strategy dims electric lights to a predetermined level based on the space's actual usage needs, rather than maximum design levels?

Daylight harvesting
Occupancy sensing
Color tuning
Task tuning (Correct answer)

Correct answer: Task tuning

Task tuning (or institutional tuning) permanently sets the maximum light output of fixtures to match the actual illuminance needs of a space, reducing energy waste from over-lit areas.

Question 113: When specifying paint for a high-traffic corridor, which finish is most appropriate for durability and cleanability?

Matte
Semi-gloss (Correct answer)
Flat
Eggshell

Correct answer: Semi-gloss

Semi-gloss paint is highly durable and washable, making it ideal for high-traffic areas like corridors where walls are frequently cleaned.

Question 114: What does the Munsell color system use to describe a color's purity or saturation?

Chroma (Correct answer)
Tint
Value
Hue

Correct answer: Chroma

In the Munsell system, chroma refers to the degree of saturation or purity of a color, distinguishing it from gray.

Question 115: What does 'means of egress' legally consist of under the IBC?

Exit access, exit, and exit discharge (Correct answer)
Sprinkler system, alarm, and doors
Corridors, stairwells, and doors only
Fire-rated walls, exit signs, and emergency lighting

Correct answer: Exit access, exit, and exit discharge

The IBC defines means of egress as a continuous path comprising three parts: exit access, the exit itself, and exit discharge to a public way.

Question 116: When specifying flooring for a commercial kitchen, which material is the MOST appropriate choice for slip resistance and hygiene?

Unglazed quarry tile with epoxy grout (Correct answer)
Luxury vinyl plank
Poured concrete with a smooth finish
Polished marble tile

Correct answer: Unglazed quarry tile with epoxy grout

Unglazed quarry tile provides inherent slip resistance and, combined with epoxy grout, creates a sanitary, durable surface for commercial kitchens.

Question 117: Which project delivery element does 'fast-tracking' refer to?

Overlapping design and construction phases to compress the overall schedule (Correct answer)
Expediting furniture and material procurement
Using prefabricated components to reduce on-site labor
Speeding up permit approval through a third-party plan check

Correct answer: Overlapping design and construction phases to compress the overall schedule

Fast-tracking overlaps design and construction phases — for example, beginning foundation work while upper-floor design continues — to shorten the overall project delivery schedule.

Question 118: What is the difference between 'substantial completion' and 'final completion' of a project?

Substantial completion = project is sufficiently complete for occupancy; final completion = all punch list items resolved and final payment made (Correct answer)
Substantial completion applies to furniture; final completion to construction
They are interchangeable terms used in different regions
Substantial completion = 50% of work done; final completion = 100% of work done

Correct answer: Substantial completion = project is sufficiently complete for occupancy; final completion = all punch list items resolved and final payment made

Substantial completion is certified when the project is complete enough for its intended use; final completion follows when all remaining punch list deficiencies are corrected and contract closeout documents are delivered.

Question 119: What is the primary acoustic challenge addressed by specifying a high NRC-rated material for a wall surface?

Vibration from mechanical equipment
Echo and reverberation within a space (Correct answer)
Sound transmission between rooms
Impact noise from footsteps

Correct answer: Echo and reverberation within a space

The Noise Reduction Coefficient (NRC) measures sound absorption; high NRC materials reduce echoes and reverberation within a space.

Question 120: What standard test method rates the flammability of carpets and rugs for use in commercial interiors?

UL 723
ASTM E648 (Critical Radiant Flux) (Correct answer)
NFPA 701 (Vertical Flame Test)
ASTM E84 (Tunnel Test)

Correct answer: ASTM E648 (Critical Radiant Flux)

ASTM E648 measures the critical radiant flux of floor-covering systems, which rates how resistant carpet is to flame spread when exposed to radiant heat.

Question 121: Which principle of design refers to the visual weight and equilibrium of elements within a composition?

Balance (Correct answer)
Emphasis
Rhythm
Proportion

Correct answer: Balance

Balance is the design principle that addresses the distribution of visual weight to create a sense of stability or dynamic tension.

Question 122: Which programming tool uses a matrix to evaluate the strength of adjacency requirements between departments?

Block plan
Bubble diagram
Adjacency matrix (Correct answer)
Stacking plan

Correct answer: Adjacency matrix

An adjacency matrix uses a grid to rate the importance of proximity relationships between each pair of departments or spaces.

Question 123: What is a 'shop drawing' and who typically prepares it?

A preliminary sketch prepared by the designer during schematic design
An as-built drawing prepared after construction
A site plan showing construction staging areas
A detailed fabrication drawing prepared by a contractor or fabricator showing how they will build a component (Correct answer)

Correct answer: A detailed fabrication drawing prepared by a contractor or fabricator showing how they will build a component

Shop drawings are detailed fabrication documents prepared by contractors, subcontractors, or fabricators showing dimensions, materials, connections, and installation details for specific components.

Question 124: In construction documents, what does a 'partition type' legend typically convey?

The structural engineer's load calculations for each wall type
The schedule of paint types applied to each partition surface
Wall assembly composition (stud size, layers of GWB, insulation, fire rating) keyed to symbols on the plan (Correct answer)
A list of vendors who supplied partition materials

Correct answer: Wall assembly composition (stud size, layers of GWB, insulation, fire rating) keyed to symbols on the plan

Partition type legends identify each wall assembly by a code (e.g., P-1, P-2) and describe its stud gauge, height, GWB layers, insulation, and fire/acoustic rating.

Question 125: Which publication from the Illuminating Engineering Society (IES) serves as the primary US reference for recommended illuminance levels and lighting design standards?

IES Lighting Handbook (Correct answer)
NFPA 101 Life Safety Code
ICC International Building Code
ASHRAE Fundamentals Handbook

Correct answer: IES Lighting Handbook

The IES Lighting Handbook is the authoritative reference for illuminance recommendations, design criteria, and best practices for all interior and exterior lighting applications in the US.

NCIDQ Interior Design Fundamentals Exam (IDFX)

The NCIDQ IDFX is the foundational section of the three-part NCIDQ certification, testing interior designers on core principles including programming, space planning, building codes, life safety, materials, and professional practice fundamentals.

125

Questions

180 min

Time Limit

70%

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