CDL GENERAL KNOWLEDGE TEST (COLORADO) - PRACTICE TEST
21.
When you have to back, you should use a helper:
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only when you back up with a trailer.
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whenever possible.
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only when backing toward the right side.
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when you need to back on a curved path.
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22.
Longer combination vehicles have the tendency to swing wide on turns. This is called:
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jackknifing.
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hydroplaning.
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off-tracking.
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rollover.
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23.
The best way to know what's going on behind and to the sides of your vehicle is to:
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check your mirrors regularly.
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lean out of the window.
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ask your passenger(s).
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use the rear view camera.
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24.
When you double your speed from 20 to 40 mph, the braking distance:
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stays about the same.
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is 4 times longer.
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increases slightly.
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doubles.
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25.
When driving on a slippery surface, you should do all of the following except:
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keep a shorter following distance.
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adjust braking to conditions.
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watch far enough ahead to keep a steady speed.
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not pass slower vehicles unless necessary.
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26.
Which of the following statements about driving in hot weather is true?
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Spots where tar "bleeds" to the surface
provide better traction.
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You should check the tire mounting and air pressure before driving.
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If a tire is too hot to touch, you should hose it down with water.
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All of the above.
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27.
When crossing or entering traffic with a heavy vehicle:
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you should allow more room if your vehicle is not loaded.
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you may need a much larger gap to enter traffic than you would in a car.
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you can count on other drivers to move out of your way so you can safely enter the flow of traffic.
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None of the above.
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28.
When driving a 60-foot truck at 50 mph, your minimum following distance should be:
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5 seconds
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6 seconds
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7 seconds
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3 seconds
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29.
When backing, you should:
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back quickly.
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avoid using the mirrors.
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use a helper if possible.
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back and turn toward the right side.
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30.
When driving on a long and/or steep downgrade, drivers should:
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use a low gear and release the brakes.
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release the clutch.
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accelerate.
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select an appropriate safe speed, and then use a low gear.
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