MARYLAND CDL AIR BRAKES PRACTICE TEST
21.
When driving at night, you should:
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look directly at the lights of oncoming vehicles.
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drive slowly enough to see obstacles with your headlights.
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put your own high beams on if other drivers don't put their low beams on.
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use dark lenses if possible.
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22.
If your truck has automatic transmission, you should downshift:
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whenever road conditions allow.
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after entering a curve.
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when you need to accelerate.
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when going down grades.
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23.
ABS malfunction lamps are located:
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under the hood.
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on the instrument panel.
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on the driver'door.
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None of the above.
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24.
To check the slack adjusters:
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park downhill and see if the vehicle rolls.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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None of the above.
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25.
Which of the following can cause brakes to fade or fail?
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Not relying on the engine braking effect
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Brakes out of adjustment
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Excessive use of the service brakes
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All of the above.
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