LOUISIANA CDL PRACTICE TEST - GENERAL KNOWLEDGE
31.
The tractor protection valve:
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prevents the trailer from being accidentally released.
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keeps your wheels from locking up when you brake hard.
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keeps air from going out if the air compressor develops a leak.
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keeps air in the brake system should the trailer develop a bad leak.
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32.
Driving dry bulk tanks requires special care. Why?
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They have a high center of gravity.
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The load can shift.
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Their weight and size can make it more difficult to stop quickly.
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All of the above.
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33.
Black ice:
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is thick enough that it makes the road look dry.
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is a thin layer that is clear enough that you can see the road underneath it.
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is thick enough that it makes the road look wet.
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None of the above.
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34.
Which of the following statements about backing heavy vehicles is true?
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Always back as quickly as possible.
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The helper should stand where you cannot see the helper.
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You should avoid backing whenever you can.
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Back to the right side so that you can see better.
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35.
If you need to make a large steering adjustment while using controlled braking, you should:
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pump the brakes and keep the wheels
locked up.
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release the brakes.
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keep braking as hard as you can while steering.
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downshift and keep braking.
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36.
How do you test hydraulic brakes for leaks?
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Pump the brake pedal ten times and see if it holds.
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
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None of the above.
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37.
A driver waiting for too long at a stop could be a sign of:
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a blind driver.
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a disabled driver.
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an aggressive driver.
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an impaired driver.
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38.
To test the stopping action of your service brakes, go about:
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15 mph.
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50 mph.
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25 mph.
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5 mph.
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39.
If a load is 10 feet long, the minimum number of tie-downs required is:
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2
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3
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4
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1
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40.
You are inspecting your vehicle during a trip. What should you do?
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Check critical items such as tires, brakes, and lights.
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Use your senses to check for problems.
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Watch gauges for signs of trouble.
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All of the above.
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