Deck 8: Lighting Systems

Question 1

Illumination is typically measured in:

A)coefficients of illumination.
B)CCTs.
C)footcandles or lumens.
D)CRIs.

Answer 1

C

Question 2

What are the drawbacks to natural light?

A)It can create a substantial heat gain within a building.
B)It is considered an inefficient light source.
C)It has poor color rendition.
D)All of the above.

Answer 2

A

Question 3

Sarah is considering buying a luminaire with a visual comfort probability (VCP) rating of 90.What does this tell her about the luminaire?

A)Most people would not find this luminaire objectionable due to glare.
B)This luminaire provides a color rendition that is 90 percent "true."
C)This luminaire is guaranteed to last 9,000 hours before burning out.
D)This luminaire provides a color temperature in the "warm" range.

Answer 3

A

Question 4

What is the most common type of electric discharge lamp?

A)mercury vapor
B)fluorescent
C)metal halide
D)high-pressure sodium

Question 5

Some current and most older electric discharge lamps present special disposal problems because they contain:

A)small amounts of mercury.
B)large amounts of lead.
C)trace amounts of radioactive elements.
D)all of the above.

Question 6

A light source's ability to provide a perceived color similar to that which results from sunlight is known as the source's:

A)illumination.
B)color code.
C)lumen.
D)color rendition.

Question 7

Exit signs must operate:

A)only at night.
B)only in dark areas within a building.
C)24 hours a day, every day.
D)during emergencies; at other times, operation is optional.

Question 8

Why should plastic luminaires be air-dried?

A)Air-drying them is faster.
B)Wiping them dry might reduce the luminaire's useful life.
C)Air-drying has many safety advantages.
D)Wiping them dry might give them a new static charge.

Question 9

"Strike time" refers to:

A)a lamp's tendency to decrease its light output over time.
B)a property's predetermined schedule for group relamping.
C)the time required for a lamp to reach full output from a cold start.
D)the expected operating lifetime of a lamp.

Question 10

David, the maintenance manager at the Riaston Hotel, purchased some replacement lamps for the hotel's guestrooms.The lamps have a lamp life of 1,000 hours; this means that each lamp is:

A)guaranteed to last for 1,000 hours before burning out.
B)expected to last for approximately 1,000 hours before burning out.
C)guaranteed to last for 500 hours before burning out.
D)expected to last for approximately 2,000 hours before burning out.