NCIDQ Cheat Sheet 2026

The 30 highest-yield NCIDQ facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which project delivery method requires the designer to complete full construction documents before a contractor is selected through competitive bidding? → Design-bid-build (DBB)
2. 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
3. What is the minimum required headroom clearance in a means of egress under IBC? → 7 feet 6 inches
4. The contractors and the? usually attend bid openings. → Owner and interior designer
5. What flooring test gives the most accurate indication of slip resistance? → ASTM D2047
6. Which resilient flooring type consists of a photographic layer protected by a clear urethane wear layer? → Luxury Vinyl Tile/Plank (LVT/LVP)
7. Which standard provides the detailed accessibility specifications that are referenced by both ADA and most state building codes? → ICC A117.1 Accessible and Usable Buildings and Facilities
8. Which document formally summarizes the client's spatial needs, including room counts, areas, and adjacency requirements? → Program document
9. What egress requirement determines the minimum number of exits required from a space in most US building codes? → Occupant load
10. Which kind of carrier offers the general public a service for moving furniture? → common carrier
11. According to IES recommendations, what is the typical illuminance range for general office tasks such as reading and computer work? → 30–50 footcandles
12. Which federal law is the primary accessibility standard for commercial facilities in the United States? → Americans with Disabilities Act (ADA)
13. Which professional organization accredits interior design education programs in North America? → CIDA (Council for Interior Design Accreditation)
14. Who could make a quick sketch perspective drawing the easiest? → Using a perspective grid
15. What is the primary difference between porcelain and ceramic tile from a specification standpoint? → Porcelain has lower water absorption (≤0.5%) and greater density
16. What is the required minimum clear floor space at a side-approach accessible lavatory per ADA standards? → 30 inches × 48 inches
17. What is the primary purpose of a 'door schedule' in construction documents? → Tabulating each door's size, type, material, hardware set, and fire rating in one document
18. Under ADA standards, what is the maximum allowable knee clearance depth required under an accessible work surface? → 19 inches
19. Which phase of interior design services produces the documents used for contractor bidding? → Construction documents (CD) phase
20. What does 'AFF' mean as used in construction document dimensions? → Above Finish Floor
21. Which lighting technique involves aiming light parallel to a textured wall surface to emphasize its surface relief and texture? → Grazing
22. What standard test method rates the flammability of carpets and rugs for use in commercial interiors? → ASTM E648 (Critical Radiant Flux)
23. Which term describes the phenomenon where a light source causes visual fatigue by flickering at a frequency that may not be consciously perceived? → Flicker
24. What is the definition of glare in interior lighting design? → Excessive or uncontrolled brightness causing visual discomfort or reduced visibility
25. ASHRAE 90.1 establishes energy efficiency requirements for commercial buildings by limiting which lighting metric? → Lighting Power Density (LPD) in watts per square foot
26. What is the standard unit of measurement for luminous flux, representing the total quantity of light emitted by a source? → Lumen
27. In LEED certification, which lighting strategy is most directly credited under the Indoor Environmental Quality (IEQ) category? → Providing individual occupant lighting controls for adjustability
28. 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
29. Which space planning approach places private offices along interior zones and workstations along the perimeter? → Inverted office planning
30. Which lighting control strategy dims electric lights to a predetermined level based on the space's actual usage needs, rather than maximum design levels? → Task tuning