Chapter 110

Question 0

An advantage of low voltage switching is:
A) that local and remote control of lights is permitted
B) the wiring does not require conduits
C) changes are simple and economical
D) all of the above

Answer 0

D) all of the above

Question 1

A luminaire is a:
A) type of light reflector
B) type of light refractor
C) lamp ballast
D) complete lighting unit

Answer 1

D) complete lighting unit

Question 2

In large buildings, lighting is typically \_\_\_% of the electrical load
A) 60
B) 50
C) 75
D) 80

Answer 2

A) 60

Question 3

Occupancy sensors which illuminate areas only when they are occupied can reduce lighting costs in areas with low occupancy and pay for themselves in less than:
A) 1 year
B) 5 years
C) 2 years
D) 9 months

Answer 3

C) 2 years

Question 4

In daylight conditions, the resistance of the cadmium-sulphide cell in a photocell is:
A) 15 megaohms
B) less than 1000 ohms
C) 2500 ohms
D) 3200 ohms

Answer 4

B) less than 1000 ohms

Question 5

The life safety code requires that the maximum tolerance duration allowed during a loss of power to the perimeter and security is:
A) 30 seconds
B) 45 seconds
C) 60 seconds
D) 10 seconds

Answer 5

D) 10 seconds