IN CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
Which of the following is not a sign of fatigue?
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Rubbing eyes
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Yawning repeatedly
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Frequent blinking
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Keeping a steady speed
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12.
Combination vehicles have __ air lines.
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3
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1
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2
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4
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13.
A trailer jackknife is more likely to happen when the trailer is:
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loaded to its full capacity.
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empty.
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overloaded.
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None of the above.
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14.
The space under a heavily loaded vehicle can be very small. This can cause problems:
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when crossing railroad tracks.
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on unpaved yards.
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on dirt roads.
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All of the above.
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15.
If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
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tight.
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worn.
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loose.
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cracked.
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16.
The tractor protection valve:
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supplies air to the trailer air tanks.
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controls the emergency brakes on combination vehicles.
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works the trailer brakes.
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keeps air in the tractor brake system should the trailer break away or develop a bad leak.
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17.
Hanging meat in a refrigerated truck:
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creates a low center of gravity.
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can be a very unstable load.
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should never be transported.
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will not affect safe driving ability.
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18.
Air brakes use ________ to make the brakes work.
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compressed air
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compressed gases
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compressed oil
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compressed gas cylinders
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19.
If you become drowsy while driving, you should:
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open the windows to get some fresh air.
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drink plenty of coffee.
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take a break.
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try to fight it.
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20.
If you must stop on a one-way or divided highway, place your warning devices:
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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