Electrical Set 2 Vol 1

70 Questions | Total Attempts: 93

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Electrical Set 2 Vol 1 - Quiz

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Questions and Answers
  • 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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