NCIDQ Lighting Design 3

Question 1

What is the primary function of a photosensor (daylight sensor) in a lighting control system?

Accepted Answer

Dim or switch off artificial lights in response to available natural daylight

Answer

Detect occupancy and turn off lights when rooms are vacant

Answer

Measure total energy consumption of the lighting system

Answer

Switch emergency lighting on during power outages

Question 2

Per NFPA 101 (Life Safety Code), emergency egress lighting must remain operational for a minimum of how long after a power failure?

Accepted Answer

1.5 hours

Answer

30 minutes

Answer

1 hour

Answer

2 hours

Question 3

In LEED certification, which lighting strategy is most directly credited under the Indoor Environmental Quality (IEQ) category?

Accepted Answer

Providing individual occupant lighting controls for adjustability

Answer

Installing only energy-efficient LED fixtures

Answer

Using exclusively daylight-only lighting systems

Answer

Installing backup emergency generator systems

Question 4

What does DALI stand for in lighting control systems, and what is its key advantage?

Accepted Answer

Digital Addressable Lighting Interface — allows individual fixture control

Answer

Direct Addressable Lamp Interface — simplifies wiring

Answer

Dynamic Automatic Lighting Intensity — adjusts light automatically

Answer

Dimmable Adjustable Luminaire Integration — standardizes dimming

Question 5

The Light Loss Factor (LLF) is used in lighting calculations to account for:

Accepted Answer

The reduction in light output over time due to lamp aging, dirt accumulation, and other factors

Answer

The directional output characteristics of a luminaire

Answer

The color shift of lamps under different voltage conditions

Answer

The ratio of direct to indirect light in a space

Question 6

Which lighting control strategy dims electric lights to a predetermined level based on the space's actual usage needs, rather than maximum design levels?

Accepted Answer

Task tuning

Answer

Occupancy sensing

Answer

Daylight harvesting

Answer

Color tuning

Question 7

Which term describes the phenomenon where a light source causes visual fatigue by flickering at a frequency that may not be consciously perceived?

Accepted Answer

Flicker

Answer

Stroboscopic effect

Answer

Veiling reflection

Answer

Disability glare