CDL COMBINATION PRACTICE TEST (AL)
11.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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prevent movement of cargo.
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reduce the chance of the front wheels skidding.
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keep from rolling back.
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hold compressed air.
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12.
As part of the final air brake check, you should:
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Test low pressure warning signal.
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Check air compressor governor cut-in and cut-out pressure.
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Test air leakage rate.
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All of the above.
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13.
A red triangle with an orange center means:
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Slow-moving vehicle
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Law enforcement vehicle
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The vehicle is hauling hazardous materials
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Liquid tanker
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14.
Most truck driver deaths in crashes result from:
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truck rollovers.
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following too closely.
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off-tracking.
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driving side-by-side with another truck.
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15.
Which of these is more likely to rollover due to the "crack-the-whip" effect?
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The front trailer of 65 ft. conventional doubles
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The last trailer of doubles
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The last trailer of triples
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5-axle tractor semitrailers
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16.
Which of the following will NOT help you prevent rollover?
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Using the controlled braking method.
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Keeping the cargo as close to the ground as possible.
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Driving slowly around turns.
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All of the above.
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17.
When backing, as soon as you see the trailer getting off the proper path, you should:
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turn the top of the steering wheel in the opposite direction of the drift.
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to keep a firm grip on the steering wheel and continue backing.
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turn the top of the steering wheel in the direction of the drift.
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None of the above.
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18.
Antifreeze:
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helps the engine only under hot conditions.
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helps the engine only when the temperature is below freezing.
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doesn't help the engine in any way.
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helps the engine under hot conditions as well as cold conditions.
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19.
Which of the following makes a rollover more likely?
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Keeping the cargo as close to the ground as possible
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Keeping the load centered on your rig
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Driving slowly around turns
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Driving quickly around turns
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20.
When using a fire extinguisher, you should stay:
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as far away from the fire as possible.
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at least 10 feet away from the fire.
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as close to the fire as possible, without getting burnt.
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at whatever distance you think is safe.
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