Book2 Unit 3 Flashcards
________ high-level lighting is provided for a work area or display without considerations of overall uniform ambient lighting.
A) Uniform
B) Non-uniform
C) Local
D) Task
E) Combined
C) Local
A 2-pole or double pole switch has ________ terminals for connection to the wires.
A) One
B) Two
C) Three
D) No
E) Four
E) Four
Lamp efficiency is expressed in:
A) Candle per power
B) Lumens per watt
C) Watts per lumen
D) Lumens per volt
E) Power per watt
B) Lumens per watt
One of the disadvantages of indirect lighting is:
A) Produces uniform, diffused, shadow-free light
B) Blends in with the environment
C) Potential for maximum visual comfort
D) Greater direct glare control
E) Less energy efficient
E) Less energy efficient
Ultrasonic motion detectors send out a/an ___________, which is capable of bouncing off walls and around corners.
A) Infrared tone
B) Audible tone
C) Ultraviolet tone
D) Inaudible tone
E) Infrared beam
D) Inaudible tone
Circuit protection for all branch circuits that is required by Electrical Codes is accomplished by the use of a:
A) Circuit switch
B) Transformer
C) Circuit breaker
D) Tie breaker
E) Ground fault breaker
C) Circuit breaker
One of the disadvantages for direct lighting is:
A) Low initial cost
B) Greater potential for direct glare
C) More energy efficient
D) Easier to control and direct
E) Lower floor to ceiling height possible
B) Greater potential for direct glare
The coefficient of utilization (CU) of a lamp describes the percentage of light produced by the lamps:
A) That arrives on the work plane
B) In lumens per watt
C) From the current consumed
D) That leaves the lamp
E) In watts per lumen
A) That arrives on the work plane
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?
A) Type 1
B) Type 2 or 3
C) Type 1, 2, or 3
D) Type 3
E) Type 1 or 2
C) Type 1, 2, or 3
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.
A) Transylvania
B) Translucent
C) Transamerica
D) Transportation
E) Transcendental
B) Translucent
What percentage of the electrical consumption in a large office building is attributed to the lighting systems?
A) 68%
B) 50%
C) 40%
D) 60%
E) 75%
D) 60%
Which type of emergency lighting is required by the Life Safety Code to be provided automatically for means of egress (exit) for office buildings with occupancy in excess of 1000 people?
A) Type 1
B) Type 3
C) Type 1 or 2
D) Type 2 or 3
E) Type 1, 2, or 3
E) Type 1, 2, or 3
Even in very clean situations, light output can drop by _______ per year.
A) 5%
B) 9%
C) 12%
D) 15%
E) 3%
A) 5%
High efficiency ballasts can reduce energy consumption by as much as _______ due to decreased wattage losses within the steel core and copper windings.
A) 12%
B) 15%
C) 5%
D) 3%
E) 9%
E) 9%
What is the resistance of a photo cell when dark?
A) 5 megohms
B) 10 megohms
C) 25 megohms
D) 30 megohms
E) 15 megohms
E) 15 megohms
