CDL GENERAL KNOWLEDGE TEST (DE) - PRACTICE TEST
21.
You are driving on a two-lane road. If an oncoming driver has drifted into your lane:
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you should downshift.
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a move to your left is best.
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a move to your right is best.
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you should brake as hard as you can.
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22.
You must have at least _____ inch tread depth in every major groove on front tires.
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2/32
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3/32
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6/32
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4/32
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23.
To back-up safely, you should:
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use mirrors on both sides.
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start in the proper position.
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look at your path.
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All of the above.
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24.
If brakes fail on a long downgrade, you should:
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use an escape ramp if it is available.
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set the parking brake.
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pump the brake pedal 3 times.
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turn off the engine as soon as you.
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25.
You cannot inspect sealed loads, but you should:
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check that the lightest parts of the cargo are under the heaviest parts.
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make sure the cargo is piled up high.
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check that you do not exceed gross weight and axle weight limits.
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check that the content matches the description on the shipping paper.
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26.
Which of the following are key steering system parts?
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Axle, main spring, spring shackle
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Leaf spring, torque rod, front axle hanger
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Lug nuts, rims, tire
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Tie rod, drag link, spindle
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27.
Parking brakes are:
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not required on trailers.
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not required on commercial vehicles with air brakes.
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required on all vehicles.
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not required on buses.
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28.
When backing, as soon as you see the trailer getting off the proper path, you should:
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to keep a firm grip on the steering wheel and continue backing.
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turn the top of the steering wheel in the opposite direction of the drift.
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turn the top of the steering wheel in the direction of the drift.
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None of the above.
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29.
Which of the following trailers can get stuck on raised crossings?
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Car carrier
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Lowboy
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Moving van
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All of the above.
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30.
If a load is 10 feet long, the minimum number of tie-downs required is:
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4
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3
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1
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2
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