CDL COMBINATION PRACTICE TEST ALASKA
11.
Air brakes use ________ to make the brakes work.
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compressed air
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compressed gas cylinders
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compressed gases
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12.
During a trip:
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you should watch gauges for signs of trouble.
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you should watch gauges to make sure that valve caps are not missing.
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you should not watch gauges as they can be misleading.
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13.
When you are driving on a slippery road, you should NOT:
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keep a longer following distance.
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adjust turning and braking to road conditions.
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use the engine brake or speed retarder.
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14.
Inspecting the fifth-wheel does NOT include:
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checking for missing or damaged parts.
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checking that there are no cracks in the frame.
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backing until the fifth-wheel just touches the trailer.
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15.
Combination vehicles have __ air lines.
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1
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3
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2
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16.
When you back under a trailer:
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back the tractor slowly.
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use lowest reverse gear.
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All of the above.
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17.
A bridge formula permits:
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less maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are close together.
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more maximum axle weight for axles that are closer together.
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18.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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rearward amplification.
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the rear trailer of a triple.
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strong wind.
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19.
Which of the following is NOT a good rule for using turn signals?
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Signal continuously until you have completed the turn.
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Put your turn signal on after the turn.
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Cancel your signal after you have turned.
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20.
During a trip you need to inspect the cargo and its securing devices:
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after every break you take.
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every 3 hours or 150 miles.
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All of the above.
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