IN CDL GENERAL KNOWLEDGE TEST - CDL PRACTICE TEST
21.
__________ will help a drinker sober up.
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Coffee and a little fresh air
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Only fresh air
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Only coffee
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Only time
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22.
When backing, you should:
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use a helper if possible.
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avoid using the mirrors.
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back and turn toward the right side.
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back quickly.
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23.
An advantage of going right instead of left around an obstacle is that:
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No one is likely to be driving on the shoulder, but someone may be passing you on the left.
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There is no real advantage.
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By turning right, you will force other drivers into an opposing traffic lane.
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Turning right comes more natural in emergency situations.
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24.
When the wheels of a trailer lock up, the trailer will tend to swing around. This is more likely to happen when:
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the trailer is empty or lightly loaded.
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the trailer is overloaded.
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the trailer is fully loaded.
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None of the above.
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25.
If you experience a tire failure, do NOT:
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hold the steering wheel firmly.
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when the vehicle has slowed down, brake very gently, pull off the road, and stop.
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stay off the brake (unless you're about to run into something).
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apply the brakes as hard as you can.
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26.
When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
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you should check your after the start of any trip to make sure they are properly adjusted.
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there are blind spots that your mirrors cannot show you.
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convex mirrors make things look larger and closer than they really are.
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every registered motor vehicle must have at least one mirror.
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27.
If you are involved in a collision and not seriously hurt, you should:
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protect the area.
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notify the authorities.
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do your best to care for the injured.
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All of the above.
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28.
You should not use your horn unnecessarily. Why?
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On vehicles possessing air brakes, it uses up air pressure you may need to be able to stop
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The horn on a vehicle wears out very quickly
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The horn can startle other drivers, which could be dangerous.
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All of the above.
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29.
Headlights:
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must be turned on a half hour before sunset to a half hour after sunrise.
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should be out of adjustment.
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should not be used when driving at night.
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can blind other drivers.
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30.
How can you avoid rolling back when you start your vehicle?
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Accelerate quickly so the vehicle does not jerk.
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Partly engage the clutch before you take your right foot off the brake.
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Use stab braking before you engage the clutch.
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All of the above.
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