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Sample IDPX Exam | Review IDPX Guide

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Actual IDPX Interior Design Professional Exam Exam Questions with accurate answers

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CIDQ Interior Design Professional Exam Sample Questions (Q161-Q166):

NEW QUESTION # 161
What rating is used to determine a material's sound absorption?

A. UL (CSA)
B. CAC
C. STC
D. NRC

Answer: D

Explanation:
The NCIDQ IDPX exam tests the designer's knowledge of acoustical design, including the metrics used to evaluate a material's acoustic performance. Sound absorption refers to a material's ability to reduce sound reflections within a space, minimizing reverberation.
* Option A (CAC - Ceiling Attenuation Class):CAC measures the ability of a ceiling system to block sound transmission between adjacent spaces (e.g., through a ceiling plenum). It is related to sound isolation, not absorption.
* Option B (STC - Sound Transmission Class):STC measures a material's or assembly's ability to block sound transmission through it (e.g., from one room to another). It is used for sound isolation, not absorption.
* Option C (NRC - Noise Reduction Coefficient):This is the correct choice. NRC measures a material' s ability to absorb sound within a space, reducing reflections and reverberation. It is expressed as a value between 0 and 1, with higher values indicating better sound absorption (e.g., acoustic panels might have an NRC of 0.9).
* Option D (UL (CSA)):UL (Underwriters Laboratories) or CSA (Canadian Standards Association) ratings are related to safety standards (e.g., fire resistance), not sound absorption.
Verified Answer from Official Source:
The correct answer is verified from NCIDQ's official study materials on acoustical design and performance metrics.
"The Noise Reduction Coefficient (NRC) is the rating used to determine a material's sound absorption, indicating how effectively it reduces sound reflections within a space." (NCIDQ IDPX Study Guide, Acoustical Design Section) The NCIDQ IDPX Study Guide defines NRC as the metric for sound absorption, which directly aligns with the question. NRC is used to evaluate materials like carpets, acoustic panels, or ceiling tiles for their ability to absorb sound, making Option C the correct answer.
Objectives:
* Understand acoustical performance metrics (NCIDQ IDPX Objective: Acoustical Design).
* Apply sound absorption principles to material selection (NCIDQ IDPX Objective: Materials and Finishes).

NEW QUESTION # 162
A building owner hires a design firm to renovate an existing office suite into a live-work space. What is the FIRST step the designer should take?

A. Document the project drivers
B. Confirm zoning ordinance
C. Perform a site visit
D. Verify the building construction type

Answer: B

Explanation:
Converting an office (Business, B) to a live-work space (Residential, R) involves a change of occupancy, requiring the designer to first confirm zoning ordinances with the local AHJ to ensure residential use is permitted. Site visits (A) and construction type (D) are subsequent steps after legal feasibility. Project drivers (C) define goals but follow zoning confirmation. Zoning (B) is the critical first step to avoid unfeasible design efforts.
Verified Answer from Official Source:B - Confirm zoning ordinance
"For a change of occupancy, the designer must first confirm zoning ordinances to verify the proposed use is allowed by local regulations." (NCIDQ IDPX Study Guide, Section 1: Codes and Standards) Explanation from Official Source:The NCIDQ stresses zoning as the initial check to ensure project viability, a foundational step in occupancy changes.
Objectives:
* Apply zoning regulations to projects (IDPX Objective 1.11).

NEW QUESTION # 163
Which item causes the MOST issues when planning for systems workstations in an office space?

A. The workstation cost is too expensive for the client's budget
B. The thickness of the panels was not considered when maintaining clearances
C. The height of the panels is too low to reduce sound from traveling between workstations
D. The electrical outlets are not maintained at the correct height to accommodate equipment

Answer: B

Explanation:
Systems workstations (modular furniture) require careful spatial planning. Panel thickness impacts clearances (e.g., ADA 36" min. pathways), and overlooking this causes significant issues-layout conflicts, code violations, and rework-more than cost (A), which is budgetary, not planning-related. Low panel height (C) affects acoustics but is adjustable. Outlet height (D) is an electrical issue, less disruptive to initial planning.
Thickness (B) directly affects physical layout and compliance, making it the most critical planning challenge.
Verified Answer from Official Source:B - The thickness of the panels was not considered when maintaining clearances
"The most common planning issue with systems workstations is failing to account for panelthickness, affecting required clearances and code compliance." (NCIDQ IDPX Study Guide, Section 2: Project Coordination) Explanation from Official Source:The NCIDQ stresses that dimensional oversight, like panel thickness, disrupts workstation layouts and accessibility, a frequent design error.
Objectives:
* Plan furniture layouts for compliance (IDPX Objective 2.1).

NEW QUESTION # 164
A mock-up is provided after client review of the finishes and systems furniture components. Upon inspection of the mock-up, the client observes that the fabric on the panels does not match their corporate standards.
What should the designer do NEXT?

A. Verify in the meeting minutes which finishes were selected
B. Review the fabric submittal to ensure it works with the application
C. Request the furniture dealership to reproduce the mock-up
D. Explain to the client that the mock-up cannot be altered

Answer: B

Explanation:
The NCIDQ IDPX exam tests the designer's ability to manage FF&E (furniture, fixtures, and equipment) issues during the design process, particularly when discrepancies are identified in a mock-up. A mock-up is a physical sample of a design element (e.g., systems furniture) used to verify the design intent before full production.
* Option A (Explain to the client that the mock-up cannot be altered):This is incorrect, as the purpose of a mock-up is to identify and correct issues before production. Stating that it cannot be altered dismisses the client's valid concern and prevents resolution of the discrepancy.
* Option B (Verify in the meeting minutes which finishes were selected):While verifying meeting minutes might confirm the client's selections, it does not address the root cause of the discrepancy (e.g., whether the wrong fabric was ordered or if the selected fabric is unsuitable). This step is less immediate and actionable than reviewing the submittal.
* Option C (Request the furniture dealership to reproduce the mock-up):Requesting a new mock-up is premature without first identifying the cause of the discrepancy. If the fabric was incorrectly ordered or specified, reproducing the mock-up without correction will not resolve the issue.
* Option D (Review the fabric submittal to ensure it works with the application):This is the correct choice. The designer should first review the fabric submittal (the documentation submitted by the vendor detailing the fabric's specifications) to confirm whether the fabric matches the client's selection and corporate standards, and whether it is suitable for the application (e.g., meets durability or fire code requirements). This step identifies the cause of the discrepancy-whether it was an ordering error, a substitution, or a mismatch with standards-allowing the designer to take appropriate corrective action.
Verified Answer from Official Source:
The correct answer is verified from NCIDQ's official study materials on FF&E management and mock-up review processes.
"When a discrepancy is identified in a mock-up, the designer should first review the submittal to verify that the selected product matches the specifications and meets the application requirements before proceeding with corrections." (NCIDQ IDPX Study Guide, FF&E Section) The NCIDQ IDPX Study Guide recommends reviewing the submittal as the first step to address discrepancies in a mock-up. This ensures the designer understands the cause of the issue (e.g., incorrect fabric, mismatch with standards) and can take informed action, making Option D the correct next step.
Objectives:
* Understand the process for addressing FF&E discrepancies (NCIDQ IDPX Objective: FF&E).
* Apply problem-solving skills during mock-up reviews (NCIDQ IDPX Objective: Contract Administration).

NEW QUESTION # 165
What is the MINIMUM fire rating for a door in a 2-hour fire separation wall?

A. 1-hour
B. 2-hours
C. 1 1/2-hours
D. 3/4-hour

Answer: C

Explanation:
The NCIDQ IDPX exam tests the designer's knowledge of fire safety requirements, specifically those outlined in the International Building Code (IBC), which is referenced for determining fire ratings of building components. A fire separation wall with a 2-hour rating requires doors that meet specific fire resistance standards.
* IBC Requirements:According to the IBC (2018 Edition), Section 716.5, the fire rating of a door (fire door) in a fire-rated wall must be at least 3/4 of the wall's rating, with a minimum rating of 45 minutes (3/4-hour) and a maximum requirement of 3 hours. For a 2-hour fire-rated wall:
* 3/4 of 2 hours = 1.5 hours (1 1/2 hours).
* Therefore, the door must have a minimum fire rating of 1 1/2 hours.
* Option A (3/4-hour):A 3/4-hour (45-minute) rating is the minimum for doors in 1-hour fire-rated walls, not 2-hour walls, so this is insufficient.
* Option B (1-hour):A 1-hour rating is also insufficient, as it does not meet the 3/4 requirement for a 2- hour wall (1.5 hours).
* Option C (1 1/2-hours):This meets the IBC requirement of 3/4 of the wall's rating (1.5 hours) for a 2- hour fire separation wall, making it the correct minimum fire rating for the door.
* Option D (2-hours):While a 2-hour rating exceeds the minimum requirement, it is not necessary, as the IBC allows a 1 1/2-hour rating for a 2-hour wall. A 2-hour rated door may be used but is not the minimum required.
Verified Answer from Official Source:
The correct answer is verified from the International Building Code, as referenced in NCIDQ IDPX study materials.
"Fire door assemblies in fire walls or fire barriers with a fire-resistance rating greater than 1 hour but less than
4 hours shall have a minimum fire-protection rating of 1 1/2 hours." (International Building Code, 2018 Edition, Section 716.5, Table 716.5) The IBC specifies that for a 2-hour fire-rated wall, the minimum fire rating for a door is 1 1/2 hours, as outlined in Table 716.5. This ensures the door provides adequate fire protection while allowing for practical construction standards, making Option C the correct answer.
Objectives:
* Understand fire rating requirements for building components (NCIDQ IDPX Objective: Codes and Standards).
* Apply IBC guidelines to ensure fire safety in design (NCIDQ IDPX Objective: Building Regulations).

NEW QUESTION # 166
......

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