GENERAL KNOWLEDGE CDL TEST DISTRICT OF COLUMBIA - PRACTICE TEST
21.
Front-end header boards:
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protect you from your cargo in case of an accident.
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protect your from glare and eyestrain.
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can cause your vehicle to hydroplane.
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protect the cargo from weather.
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22.
When driving in a construction zone, if a construction worker is near the road, you should:
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maintain a constant speed.
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come to a complete stop.
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further reduce your speed.
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speed up.
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23.
Pre-trip inspections are:
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required only for trips of more than 50 miles.
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required by law
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recommended.
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required only for trips of more than 100 miles.
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24.
When should you inspect your vehicle and cargo?
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Before and after a trip.
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Before, during and after a trip.
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During and after a trip.
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Before and during a trip.
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25.
When the temperature drops, which of the following surfaces will become icy first?
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Off-ramps
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Curves
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Bridges
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Underpasses
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26.
Overloading can have bad effects on all of the following except:
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Steering
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Exhaust system
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Speed control
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Braking
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27.
The posted speed limit:
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should never be exceeded.
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should only be exceeded when passing other vehicles.
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may only be exceeded when driving in rural areas.
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is only a suggestion.
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28.
A low air pressure warning signal must come on when the air pressure in the tanks falls below:
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60 psi.
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15 psi.
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10 psi.
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100 psi.
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29.
When backing a trailer, you should:
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turn the steering wheel in the direction you want to go.
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avoid correcting the drift.
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try to position your vehicle so you can back in a straight line.
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never make pull-ups to reposition your vehicle.
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30.
No matter how small the cargo is, it should have at least:
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1 tie-down.
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6 tie-downs.
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4 tie-downs.
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2 tie-downs.
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