CDL GENERAL KNOWLEDGE TEST (DC) - PRACTICE TEST
21.
Heights posted at bridges and overpasses:
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are always incorrect.
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can be incorrect.
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are always accurate.
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None of the above.
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22.
Service brakes should:
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only be checked by a mechanic.
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always be checked before applying the brakes.
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be checked before each trip.
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All of the above.
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23.
Which of the following is part of checking lights?
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Turning off the engine and taking the key with you.
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Turning on the headlights and four-way flashers.
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Getting out of the vehicle.
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All of the above.
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24.
When driving trucks with trailers, drivers should:
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push the brake pedal to the floor when braking.
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decrease their following distance.
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avoid making sudden movements with the steering wheel.
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make quick lane changes.
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25.
If you are being tailgated, you should:
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increase your following distance.
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avoid tricks like turning on your taillights or flashing your brake lights.
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avoid quick changes.
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All of the above.
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26.
How do you test hydraulic brakes for leaks?
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Pump the brake pedal ten times and see if it holds.
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
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None of the above.
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27.
For safety during a trip, you should:
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drive on the shoulder of the road.
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pull off the road and stop.
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shift into a lower gear.
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use your senses to check for problems.
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28.
Glad hands are:
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warning devices.
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electronic devices.
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securement devices.
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coupling devices.
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29.
When using a fire extinguisher on a fire, you should:
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aim the extinguisher at the top of the fire.
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get as close to the fire as possible.
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stay as far away from the fire as possible.
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All of the above.
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30.
What should you do to test your hydraulic brakes for leaks?
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Hold the brake pedal down for five seconds, then pump it three times.
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Pump the brake pedal five times, then apply pressure for three seconds.
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Pump the brake pedal three times, then apply pressure to the pedal and hold for five seconds.
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Pump the brake pedal three times, then apply pressure for 9 seconds.
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