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20 Cards in this Set
- Front
- Back
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When an incandescent light bulb is energized in an electrical circuit, what is electrical energy converted to? |
Heat and Light |
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What is the function of a headlamp dimmer switch |
switches headlamps between separate low and high beam circuits |
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What type of headlight fires an arc through gas to produce light energy |
HID |
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Which of the following best explains the construction of a halogen headlamp element |
Tungsten filament encased in a quartz tube |
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How much voltage is required to sustain the arc in a typical HID headlamp assembly |
85 volts |
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Which of the following best describes light energy |
photons |
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Which of the following would be used to switch turnlights on a truck chassis |
Stalk switch |
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How many contacts are in a typical tractor to trailer electrical connector |
7 |
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What color code is used for the brake light circuit in a truck trailer electrical connector |
Red |
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When truck and trailer clearance lights and headlamps seem to burn out at a high rate which of the following would be a req step in troubleshooting |
Charging system regulator |
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Which of the following governs highway truck exterior lighting standards in N. American trucks |
FMVSS 108 |
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In a standard SAE relay, which of the following is normally open |
5 |
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In an older standard SAE relay which pair of terminals energizes the coil circuit |
85 and 86 |
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The headlights on a truck with electromechanical controls and circuit breaker protection continuously lights then goes out, Tech A says that if the circuit breaker is a type 1 replacing it with a type 2 should fix teh problem. Tech 2 says the type 2 circuit is broken. Who is correct |
Neither A nor b |
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Tech A says that the standard SAE relay terminal 3 is always the common terminal. Tech B says that in a standard SAE relay the coil circuit must be energized to close the normally open 5 terminal. Who is correct |
Both A and B |
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What is the maximum acceptable total voltage drop across all of the terminals and cables on the insulated side of a cranking circuit |
0.5 |
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Tech A says that a corroded light unit terminal could result in an increased voltage drop across the terminal. Tech B says that a corroded light unit terminal could result in heat at the terminal. Who is correct? |
Both A and B |
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Tech A sas that a disadvantage of using LEDs as stoplights is that when the circuit is switched on, they illuminate at a slower speed than incandescent bulbs. Tech B says that xenon headlamps are a disadvantage in trucks because they have a shorter service life than halogen bulbs. |
Neither A nor B |
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What type of filament is used in a halogen headlight |
Tungsten |
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Tech A says that HID headlights consume more electrical power than equivalent halogen headlamps. Tech B says that HID headlamps are brighter and their blue light is more similar to natural sunlight than that of Halogen lamps. |
Tech B |
