NCIDQ Lighting Design 2

Question 1

A luminaire's efficacy is expressed as which unit of measurement?

Accepted Answer

Lumens per watt

Answer

Watts per square foot

Answer

Candela per square meter

Answer

Footcandles per lumen

Question 2

According to IES recommendations, what is the typical illuminance range for general office tasks such as reading and computer work?

Accepted Answer

30–50 footcandles

Answer

5–10 footcandles

Answer

150–200 footcandles

Answer

300–500 footcandles

Question 3

In healthcare examination rooms, which lighting characteristic is most critical for accurate diagnosis and skin tone assessment?

Accepted Answer

High CRI (90+) for accurate color rendering

Answer

Warm color temperature (2700K) for patient comfort

Answer

Low illuminance to minimize visual fatigue

Answer

Indirect lighting to eliminate all shadows

Question 4

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

Accepted Answer

Grazing

Answer

Wall washing

Answer

Uplighting

Answer

Downlighting

Question 5

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

Accepted Answer

Lighting Power Density (LPD) in watts per square foot

Answer

Minimum CRI for workplaces

Answer

Maximum color temperature for offices

Answer

Emergency lighting duration requirements

Question 6

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

Accepted Answer

IES Lighting Handbook

Answer

ASHRAE Fundamentals Handbook

Answer

NFPA 101 Life Safety Code

Answer

ICC International Building Code

Question 7

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

Accepted Answer

Evenly illuminating a vertical wall surface from top to bottom

Answer

Cleaning luminaire lenses to maintain output

Answer

Directing light upward to reflect off the ceiling

Answer

Using colored filters to tint wall surfaces