Free CIDQ IDFX Exam Actual Questions

The questions for IDFX were last updated On Jun 10, 2025

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Question No. 1

A new reflected ceiling plan communicates location and

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Correct Answer: A

A reflected ceiling plan (RCP) is a drawing that shows the ceiling of a space as if it were reflected onto the floor plan, illustrating elements such as lighting fixtures, sprinklers, ceiling materials, and other ceiling features. The NCIDQ IDFX Reference Manual outlines the purpose and content of an RCP in construction documents.

A . Soffit heights: An RCP often includes information about soffits (lowered ceiling sections), such as their location and height, to ensure proper coordination with lighting, HVAC, and other ceiling elements. Soffit heights are critical for understanding vertical clearances and ensuring that the design aligns with code requirements (e.g., minimum ceiling heights). This makes soffit heights a key piece of information communicated in an RCP.

B . Types of partitions: Partition types (e.g., wall construction) are shown on floor plans or partition plans, not on an RCP, which focuses on ceiling elements.

C . Type of electrical outlets: Electrical outlets are shown on power plans or electrical floor plans, not on an RCP, which is concerned with ceiling-mounted electrical elements like lighting fixtures.

D . Demolition of existing ceiling types: Demolition is shown on a separate demolition plan, not on a new RCP, which depicts the proposed ceiling design for construction.

The NCIDQ IDFX Reference Manual specifies that an RCP communicates the location of ceiling elements and includes details like soffit heights to ensure proper installation and coordination with other building systems.

Verified Answer from Official Source: The correct answer is A, as verified by the NCIDQ IDFX Reference Manual.

Exact Extract:

From the NCIDQ IDFX Reference Manual (Chapter 5: Construction Drawings and Specifications): 'A reflected ceiling plan communicates the location of ceiling elements, such as lighting and sprinklers, and includes details like soffit heights to ensure proper coordination and installation.'

Explanation from Official Source:

The NCIDQ IDFX Reference Manual explains that an RCP is used to show the design of the ceiling, including the placement of fixtures and features like soffits. Soffit heights are a critical detail because they affect the overall ceiling design, vertical clearances, and coordination with other systems, making this a standard piece of information included in an RCP.

Objectives:

Understand the purpose and content of a reflected ceiling plan.

Identify the types of information communicated in an RCP.


NCIDQ IDFX Reference Manual, Chapter 5: Construction Drawings and Specifications.

CIDQ resources: www.cidq.org.

Question No. 2

Which of the following is used to rate flame spread and smoke development in interior finishes?

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Correct Answer: C

Flame spread and smoke development are critical factors in evaluating the fire safety of interior finishes, such as wallcoverings and ceiling materials. The ASTM E-84 test, also known as the Steiner Tunnel Test, is the standard method used to measure these properties. It rates materials on a scale (e.g., Class A, B, C) based on how quickly flames spread and how much smoke is produced. Option A (NFPA 253) tests the critical radiant flux of floor coverings, not flame spread or smoke development. Option B (NFPA 265) tests the fire performance of textiles in room corner scenarios, not a general flame spread test. Option D (ASTM D2859) is the pill test for the flammability of carpets, not a flame spread or smoke test.

Verified Answer from Official Source:

The correct answer is verified using NCIDQ IDFX content on fire safety standards.

Exact Extract: The NCIDQ IDFX Reference Manual states, ''ASTM E-84 is the standard test method used to rate flame spread and smoke development of interior finishes, providing classifications for fire safety.''

Objectives:

Understand fire safety standards for interior finishes (IDFX Objective: Codes and Standards).

Specify materials based on fire performance ratings (IDFX Objective: Material Selection and Specification).


NCIDQ IDFX Reference Manual (Section on Codes and Standards).

ASTM E-84: Standard Test Method for Surface Burning Characteristics of Building Materials.

Question No. 3

A designer is preparing a programming document for a tenant space. Which technique would BEST confirm that the available space is adequate for user needs?

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Correct Answer: A

During the programming phase, the designer must ensure that the available space meets the client's needs as outlined in the program. The program area represents the total space required for all functions (e.g., workstations, circulation, support spaces). The usable area is the actual space available for occupancy, excluding structural elements and common areas. Equating the program area to the usable area ensures that the space can accommodate all required functions without over- or underestimating the space. Option B (rentable area) includes common areas like hallways, which inflates the space and is not accurate for functional needs. Option C (building utilization rate) is a broader metric for overall building efficiency, not specific to the tenant space. Option D (industry standards) is useful for benchmarking but not for confirming specific space adequacy.

Verified Answer from Official Source:

The correct answer is verified using NCIDQ IDFX content on programming and space planning.

Exact Extract: The NCIDQ IDFX Reference Manual states, ''To confirm space adequacy, the program area should be equated to the usable area of the tenant space to ensure all functional needs are met.''

Objectives:

Analyze space requirements during programming (IDFX Objective: Programming and Site Analysis).

Ensure space adequacy for user needs (IDFX Objective: Design Application).


NCIDQ IDFX Reference Manual (Section on Programming).

BOMA Standards for Measuring Usable Area.

Question No. 4

A completed programming package MUST contain which feature?

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Correct Answer: B

The programming phase in interior design involves gathering and analyzing information to define the project's requirements. A completed programming package must include a list of project needs and concerns, such as spatial requirements, functional needs, and client goals, as this forms the foundation for the design process. Option A (selection of colors and finishes) occurs later, during the design development phase. Option C (budget with detailed cost estimates) may be part of programming but is not a required component of the package. Option D (preliminary drawings and design concepts) is part of the schematic design phase, not programming.

Verified Answer from Official Source:

The correct answer is verified using NCIDQ IDFX content on the programming phase.

Exact Extract: The NCIDQ IDFX Reference Manual states, ''The programming package must include a comprehensive list of project needs and concerns, including spatial, functional, and client-specific requirements.''

Objectives:

Understand the components of the programming phase (IDFX Objective: Programming and Site Analysis).

Develop documentation for project requirements (IDFX Objective: Design Process).


NCIDQ IDFX Reference Manual (Section on Programming).

Ching, F. D. K., Interior Design Illustrated (programming phase).

Question No. 5

A designer is designing the interiors of a major medical center. Federal, state, and local jurisdiction codes apply. All the codes have conflicting requirements. What should the designer do?

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Correct Answer: C

When designing a major medical center, the designer must adhere to federal, state, and local codes, which may include the International Building Code (IBC), ADA standards, and healthcare-specific regulations like those from the Facility Guidelines Institute (FGI). When codes conflict, the standard practice is to comply with the most restrictive code to ensure the highest level of safety and compliance, especially in a healthcare setting where life safety is paramount. Option A (seeking code variances) is a last resort and not always feasible or timely. Option B (least restrictive code) compromises safety and is not acceptable. Option D (seeking a code source that conforms to the design) is unethical and violates code compliance principles.

Verified Answer from Official Source:

The correct answer is verified using NCIDQ IDFX content on codes and standards.

Exact Extract: The NCIDQ IDFX Reference Manual states, ''When multiple codes apply and conflict, the designer must comply with the most restrictive code to ensure safety and legal compliance.''

Objectives:

Understand the application of multiple codes in design (IDFX Objective: Codes and Standards).

Prioritize safety in code compliance (IDFX Objective: Design Application).


NCIDQ IDFX Reference Manual (Section on Codes and Standards).

International Building Code (IBC), Chapter 1: Scope and Administration.