CDL PRACTICE TEST (DE) - GENERAL KNOWLEDGE TEST
21.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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at 30 psi.
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every 15 minutes.
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if there is too little pressure.
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if there is too much pressure.
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22.
When your drive wheels have poor traction, you should:
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only use the retarder on the front wheels.
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turn the retarder off.
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only use the retarder on the rear wheels.
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turn the retarder on.
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23.
Drivers should use their horn when needed, however they must be aware that using the horn:
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is prohibited on interstate highways.
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can startle other drivers.
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damages your hearing.
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consumes the battery.
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24.
Regardless of its size, cargo should have at least ___ tie-downs.
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1
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3
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4
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2
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25.
Rims with welding repairs:
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are acceptable only when carrying a heavy load.
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can be used for tires in the front of the vehicle.
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are not safe.
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can be used for tires in the rear of the vehicle.
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26.
An Anti-lock Braking System (ABS):
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always shortens your stopping distance.
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keeps your wheels from locking up when you brake hard.
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increases your normal braking capability.
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lets you drive faster.
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27.
Your total stopping distance consists of __________ plus reaction distance plus braking distance.
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perception distance
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partial stopping distance
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following distance
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passing distance
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28.
On any upgrade, gravity:
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doubles your speed.
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doesn't affect your speed.
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speed you up.
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slows you down.
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29.
After starting the engine, you are looking at the oil pressure gauge. Oil pressure should come up to normal within:
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10 minutes.
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2 minutes.
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5 minutes.
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seconds.
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30.
When starting your vehicle, the warning lights and buzzers:
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should stay on until you manually turn them off.
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should stay on for 15-20 seconds.
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should stay on for 2 minutes.
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should go out right away.
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