Interior Design Cheat Sheet 2026

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

1. Which cloud-based platform is specifically designed for real-time collaborative interior design and space planning? → Planner 5D
2. What does the Color Rendering Index (CRI) measure? → How accurately a light source renders colors compared to natural light
3. According to Illuminating Engineering Society (IES) guidelines, what is the recommended illuminance range for general office work areas? → 30–50 foot-candles
4. The CIDA (Council for Interior Design Accreditation) accredits: → Interior design education programs at colleges and universities
5. Wayfinding research in healthcare environments consistently recommends which design strategy to reduce patient disorientation? → Landmark elements and color-coded zones at decision points
6. What is the benefit of interdisciplinary collaboration in Interior Design practice? → It brings diverse expertise and perspectives that improve outcomes and innovation
7. What is 'japandi' style in contemporary interior design? → A minimalist aesthetic blending Japanese wabi-sabi and Scandinavian hygge principles
8. What is the standard counter height in a US kitchen? → 34–36 inches
9. A client in a sun-belt region wants to reduce solar heat gain in their south-facing great room. Which window treatment strategy is most effective? → Use exterior solar shades or cellular shades with high R-value
10. What is the purpose of a fluorescent fixture's ballast? → To start voltage and operate current
11. Which tile installation pattern uses rectangular tiles arranged so the joints of one row align with the center of tiles in adjacent rows? → Running bond/brick
12. A project site has asbestos-containing ceiling tiles. Under EPA regulations, the designer's responsibility is to: → Notify the client and recommend a licensed asbestos abatement contractor
13. A client wants to install a large decorative mirror above a fireplace. What is the primary risk an interior designer must address? → Improper anchoring leading to falling hazard
14. Which approach best demonstrates professional competency in Interior Design practice? → Integrating continuing education, practical experience, and evidence-based decision making
15. When specifying electrical outlets in a kitchen redesign, what risk management step is required by the National Electrical Code (NEC)? → GFCI protection is required for all outlets within 6 feet of a sink
16. An interior designer discovers that a client's older home may contain lead paint during a renovation project. The correct first step is to: → Recommend a licensed lead abatement professional
17. A close-out document package delivered by the contractor at project completion typically includes all of the following EXCEPT: → The designer's original fee proposal
18. Which metal finish applied to fixtures and hardware is most resistant to tarnishing, fingerprints, and everyday wear in kitchen and bath applications? → Brushed nickel
19. What is the primary purpose of a project kick-off meeting with a new client? → To align on project goals, process, communication expectations, and timeline
20. Under LEED certification, which credit category addresses the use of materials with low chemical emissions to improve indoor air quality? → Indoor Environmental Quality (IEQ)
21. Which data collection tool asks respondents to rate items on a scale from 'strongly agree' to 'strongly disagree'? → Likert scale
22. Which organization administers the NCIDQ examination for interior designers in the United States? → CIDQ
23. What does the term 'net square footage' refer to in space planning? → Usable interior floor area excluding walls and structural elements
24. Which ASHRAE standard primarily governs ventilation requirements for acceptable indoor air quality in commercial buildings? → ASHRAE 62.1
25. The primary purpose of maintaining project records and correspondence files is to: → Provide legal protection and accurate project documentation
26. A pediatric dental office wants interiors that reduce child anxiety. Which evidence-based design element is most effective? → Nature-themed murals, soft curves, and warm colors
27. How do Interior Design professionals transfer knowledge from training to practice? → Through supervised practice, mentoring, gradual independence, and ongoing feedback
28. Which of the following interior elements is subject to flame spread rating requirements under building codes? → Interior wall and ceiling finish materials
29. When specifying products for a healthcare interior design project, a designer's primary competency obligation is to prioritize: → Life safety, infection control, and code compliance
30. Which paint finish is most appropriate for high-traffic areas such as hallways, kitchens, and trim due to its durability and cleanability? → Semi-gloss