Electrical Set 2 Vol 1
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- 1.1. Light fixtures are classified by
- A.
The way they distribute light
- B.
The way they are installed
- C.
Their width and length
- D.
Their size and weight
- 2.2. Which light classification directs from 40 to 60 percent of its light upward above the area to be lighted?
- A.
Indirect
- B.
Semi direct
- C.
Semi indirect
- D.
General diffusing
- 3.3. Which classification of light fixture directs all its light so that the entire ceiling and upper side walls become the light source?
- A.
Indirect
- B.
Semi direct
- C.
Semi indirect
- D.
General diffusing
- 4.4. What is the unit of measurement for lumens per square meter?
- A.
Lux
- B.
Foot candle
- C.
Candle power
- D.
Meter candle
- 5.5. The efficiency range of a lamp is measure in lumens per
- A.
Volt
- B.
Ohm
- C.
Watt
- D.
Amp
- 6.6. Incandescent lamps have efficiencies ranging from
- A.
1 to 6 lumens per watt
- B.
6 to 24 lumens per watt
- C.
24 to 60 lumens per watt
- D.
60 to 240 lumens watt
- 7.7. What is the diameter of a T8 lamp?
- A.
8/2 inch
- B.
8/4 inch
- C.
8/8 inch
- D.
8/16 inch
- 8.8. What frequency should you expect to find in electronic ballasts used in fluorescent lighting systems?
- A.
120 to 208 Hz
- B.
400 to 600 Hz
- C.
2,400 to 4,160 Hz
- D.
25,000 to 40,000 Hz
- 9.What is used to power a light emitting diode (LED) array in a non-integrated LED fixture?
- A.
LED starter
- B.
LED driver
- C.
LED ballast
- D.
LED transformer
- 10.10. What is a disadvantage of high intensity discharge (HID) lamps?
- A.
Low lumen per watt output
- B.
Lamp size is large
- C.
Lamp life is short
- D.
Restrike time
- 11.11. What are the voltages that the 150 watt high pressure sodium (HPS) lamp comes in?
- A.
55 and 100 volts
- B.
55 and 220 volts
- C.
120 and 277 volts
- D.
100 and 48 volts
- 12.12. What color light is associated with high pressure sodium (HPS) lamps?
- A.
Violet
- B.
Golden
- C.
Green blue
- D.
Blue white
- 13.13. Which type of fixture is installed by laying it into the grid of a suspended ceiling?
- A.
Surface mount
- B.
Flush mount
- C.
Wall mount
- D.
Troffer
- 14.14. When installing an octagon box for a new flush mount fixture what is important to ensure that the mounting method does not fail?
- A.
Box is sized to support the fixture
- B.
The fixture is less than 10 pounds
- C.
Fixture is secured using sheetrock screws
- D.
Fill capacity of the box to allow enough space for connections
- 15.15. What are the two types of phase cut dimmers?
- A.
Forward and reverse
- B.
Analog and digital
- C.
Positive and negative
- D.
Single pole and double pole
- 16.16. How does a phase cut dimmer operate?
- A.
A variable resistor is used to lower the voltage
- B.
Two or more resistors are used to form a voltage divider
- C.
The root mean square (RMS) voltage is reduced by turning off a portion of the input waveform
- D.
Semi conductor switches are used to turn off only the negative portion of the input waveform
- 17.17. What is the light output of a fixture using a 0-10V ballast with 10 volts on the low voltage control circuit?
- A.
10%
- B.
50%
- C.
80%
- D.
100%
- 18.18. What type of light fixture is typically used to illuminate aircraft on the parking apron?
- A.
500 watt floodlight
- B.
150 cobra head
- C.
Low pressure sodium (LPS) light fixture
- D.
1000W -1500W high intensity discharge (HID) floodlight
- 19.19. In an incandescent lamp, how much consumed energy is lost in the form of heat?
- A.
10%
- B.
50%
- C.
75%
- D.
90%
- 20.20. What device is used in high intensity discharge (HID) lamps to limit current as the lamp heats up?
- A.
Ballast
- B.
Inductor
- C.
Resistor
- D.
Capacitor
- 21.21. What letter represents the American National Standards Institute's special designation code for high pressure sodium (HPS) lamps?
- A.
S
- B.
H
- C.
L
- D.
M
- 22.22. When installing fixtures, ensure uniform lighting by
- A.
Using only mercury vapor fixtures
- B.
Adjusting fixtures to 5 degree from horizontal
- C.
Using only high pressure sodium fixtures
- D.
Adjusting fixtures so that illuminated areas overlap
- 23.23. To ensure that the proper amount of light is provided after fixture installation, check the lighting with
- A.
A stake
- B.
A voltmeter
- C.
A light meter
- D.
An ohmmeter
- 24.24. When trouble shooting a 120 volt photocell, which conductor should provided power to the light fixture?
- A.
Load (red)
- B.
Line (black)
- C.
Neutral (white)
- D.
None of the above
- 25.25. To prevent injury during re-lamping procedures, you must
- A.
Wear leather gloves
- B.
De-energize the light fixture
- C.
Wear approved safety goggles
- D.
Do all of the above tasks
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