Unit Review Lighting Systems Self-Assessment

Question 1

1. High efficiency ballasts can reduce energy consumption by as much as _____
   due to decreased wattage losses within the steel core and copper windings.
   A. 3%
   B. 5%
   C. 9%
   D. 12%
   E. 15%

Answer 1

C. 9%

Question 2

2. Even in very clean situations, light output can drop by \_\_\_\_\_ per year.
A. 5%
B. 3%
C. 9%
D. 12%
E. 15%

Answer 2

A. 5%

Question 3

3. 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.
   A. 1 seconds
   B. 3 seconds
   C. 2 to 3 minutes
   D. 0.1 seconds
   E. 10 seconds

Answer 3

E. 10 seconds

Question 4

4. What percentage of the electrical consumption in a large office building is
attributed to the lighting systems?
A. 60%
B. 50%
C. 75%
D. 68%
E. 40%

Answer 4

A. 60%

Question 5

5. Employing occupancy sensors to turn lights on and off in areas of low occupation
   can reduce lighting costs by _____ percent.
   A. 30 to 50
   B. 20 to 50
   C. 30 to 60
   D. 40 to 60
   E. 20 to 60

Answer 5

E. 20 to 60

Question 6

6. What is the resistance of a photo cell when dark?
Book 2 PanGlobal Page 92
A. 5 Megohms
B. 10 megohms
C. 15 megohms
D. 25 megohms
E. 30 megohms

Answer 6

C. 15 megohms

Question 7

7. What is the resistance of a photo cell when exposed to light?
A. 5000 ohms
B. 100 ohms
C. 1500 ohms
D. 1000 ohms
E. 300 ohms

Answer 7

D. 1000 ohms

Question 8

8. Which type of emergency lighting is required by the Life Safety Code to be
provided automatically for means of egress (exit) for places of assembly for 300
or more people?
A. Type 1
B. Type 1 or 2
C. Type 3
D. Type 1, 2 or 3
E. Type 2 or 3

Answer 8

D. Type 1, 2 or 3

Question 9

9. Which type of emergency lighting is required by the Life Safety Code to be
provided automatically for means of egress (exit) for places of assembly with
more than 1000 people?
A. Type 2 or 3
B. Type 1 or 2
C. Type 3
D. Type 1, 2 or 3
E. Type 1

Answer 9

E. Type 1

Question 10

10.One of the disadvantages of direct lighting is:
A. More energy efficient
B. Greater potential for direct glare
C. Low initial cost
D. Lower floor to ceiling height possible
E. Easier to control and direct

Answer 10

B. Greater potential for direct glare

Question 11

11.The original dimmer was a resistance type that diverted some of its current
through a/an:
A. Variable transistor
B. Variable transformer
C. Variable resistor
D. Adjustable switch
E. Automatic switch

Answer 11

C. Variable resistor

Question 12

12.Lamp efficiency is expressed in:
A. Watts per lumen
B. Lumens per watt
C. Candle per power
D. Power per watt
E. Lumens per volt

Answer 12

B. Lumens per watt

Question 13

13.One of the disadvantages of indirect lighting is:
A. Potential for maximum visual comfort
B. Greater direct glare control
C. Less energy efficient
D. Blends in with the environment
E. Produces uniform, diffused, shadow-free light

Answer 13

C. Less energy efficient

Question 14

14.One of the disadvantages of direct lighting is:
A. Harsh shadows
B. More energy efficient
C. Low initial cost
D. Lower floor to ceiling height possible
E. Easier to control and direct

Answer 14

A. Harsh shadows

Question 15

15.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:
A. The lights will not be as bright with lower voltage
B. Local and remote control of lights is permitted
C. Control wires without conduit can be used reducing costs
D. The full voltage circuitry is shortened
E. Alteration work is simple and economical

Answer 15

A. The lights will not be as bright with lower voltage

Question 16

16.A 2-pole or double pole switch has \_\_\_\_\_ terminals for connection to the wires.
A. No
B. One
C. Two
D. Three
E. Four

Answer 16

E. Four

Question 17

17.Ultrasonic motion detectors send out a/an \_\_\_\_\_, which is capable of bouncing
off walls and around corners.
A. Audible tone
B. Inaudible tone
C. Infrared beam
D. Ultraviolet tone
E. Infrared tone

Answer 17

B. Inaudible tone

Question 18

18.Circuit protection for all branch circuits that is required by Electrical Codes is
accomplished by the use of a:

A. Tie breaker
B. Circuit breaker
C. Circuit Switch
D. Ground fault breaker
E. Transformer

Answer 18

B. Circuit breaker

Question 19

19.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.
A. Redirect
B. React
C. Reflect
D. Render
E. Refit

Answer 19

C. Reflect