Book 2: 3-14 - "Lighting Systems" Flashcards
The advantages of a system of switching that uses a light-duty, low-voltage circuit to control relays which, in turn, control the load circuit are all except:
Select one:
A. Local and remote control of lights is permitted
B. The full voltage circuitry is shortened
C. Control wires without conduit can be used reducing costs
D. Alteration work is simple and economical
E. The lights will not be as bright with lower voltage
E. The lights will not be as bright with lower voltage
What is the resistance of a photo cell when dark?
Select one:
A. 30 megohms
B. 10 megohms
C. 25 megohms
D. 15 megohms
E. 5 megohms
D. 15 megohms
A 2-pole or double pole switch has _____ terminals for connection to the wires.
Select one:
A. Four
B. No
C. Two
D. Three
E. One
A. Four
Which type of emergency lighting is required by the Life Safety Code to be provided automatically for means of egress (exit) for multiple residences with 25 or more dwelling units?
Select one:
A. Type 1 or 2
B. Type 3
C. Type 1, 2 or 3
D. Type 2 or 3
E. Type 1
C. Type 1, 2 or 3
Most offices have _____ lighting since it is difficult to predict desk locations and the locations that might get by with lower lighting levels.
Select one:
A. Supplementary
B. Non-Uniform
C. Task
D. Uniform
E. Local
D. Uniform
The control of light produced by the lamp and is accomplished by the use of transparent, translucent, or opaque surfaces that refract, _____, or absorb light directing it to the zones where it is required and preventing it from reaching the zones where it is not required.
Select one:
A. React
B. Refit
C. Redirect
D. Reflect
E. Render
D. Reflect
The control of light produced by the lamp and is accomplished by the use of transparent, _____, or opaque surfaces that refract, reflect, or absorb light directing it to the zones where it is required and preventing it from reaching the zones where it is not required.
Select one:
A. Transamerica
B. Translucent
C. Transportation
D. Transylvanian
E. Transcendental
B. Translucent
For hospitals and medical areas the Life Safety Code (NFPA No. 101) allows _____ for the stand by engine to start and power to be available.
Select one:
A. 10 seconds
B. 1 seconds
C. 3 seconds
D. 0.1 seconds
E. 2 to 3 minutes
A. 10 seconds
One of the disadvantages of direct lighting is:
Select one:
A. Easier to control and direct
B. More energy efficient
C. Lower floor to ceiling height possible
D. Harsh shadows
E. Low initial cost
D. Harsh shadows
The coefficient of utilization (CU) of a lamp describes the percentage of light produced by the lamps:
Select one:
A. From the current consumed
B. That leaves the lamp
C. In lumens per watt
D. In watts per lumen
E. That arrives on the work plane
E. That arrives on the work plane
One of the disadvantages of indirect lighting is:
Select one:
A. Potential for maximum visual comfort
B. Blends in with the environment
C. Greater direct glare control
D. Produces uniform, diffused, shadow-free light
E. Less energy efficient
E. Less energy efficient
_____ high-level lighting is provided for a work area or display without consideration of overall uniform ambient lighting.
Select one:
A. Uniform
B. Local
C. Task
D. Combined
E. Non-Uniform
B. Local
The original dimmer was a resistance type that diverted some of its current through a/an:
Select one:
A. Variable transformer
B. Adjustable switch
C. Variable transistor
D. Automatic switch
E. Variable resistor
E. Variable resistor
Employing occupancy sensors to turn lights on and off in areas of low occupation can reduce lighting costs by _____ percent.
Select one:
A. 30 to 60
B. 20 to 50
C. 20 to 60
D. 30 to 50
E. 40 to 60
C. 20 to 60
Ultrasonic motion detectors send out a/an _____, which is capable of bouncing off walls and around corners.
Select one:
A. Infrared tone
B. Infrared beam
C. Inaudible tone
D. Ultraviolet tone
E. Audible tone
C. Inaudible tone
