CDL PRACTICE TEST (VT) - GENERAL KNOWLEDGE TEST
21.
The tractor protection valve:
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prevents the trailer from being accidentally released.
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keeps your wheels from locking up when you brake hard.
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keeps air in the brake system should the trailer develop a bad leak.
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22.
Most heavy vehicles require ________ change gears.
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double clutching
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double shifting
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single clutching
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23.
If you're carrying hazardous materials and are stopped at a truck stop, you should:
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keep the shipping papers with you.
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leave the shipping papers in the driver’s door pouch or on the driver’s seat.
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leave the shipping papers on the dashboard in clear view.
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24.
In order for you to be seen easily:
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lights should only be used when driving in driving in rainy weather.
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lights should be clean and working properly.
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lights should be turned off when driving during the day.
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25.
When is use of a drug given to a driver by a doctor permitted?
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Only if it's a prescription drug.
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Only if the doctor informs the driver that the drug won't affect safe driving ability.
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Never.
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26.
If you find anything unsafe during the pre-trip inspection, you are required to:
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write it in your inspection report.
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get it fixed before driving.
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drive cautiously until it is fixed.
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27.
Rust around wheel nuts may mean:
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the wheels or rims have had welding repairs.
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the nuts are loose.
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the nuts are too tight.
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28.
The best way to recognize that your trailer has started to skid is:
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by feeling the brakes come on.
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by recognizing tire failure.
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by seeing it in your mirrors.
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29.
The most important hand signal you should agree on with a helper is:
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Stop
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Keep backing
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Go
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30.
When checking the engine compartment, which of the following should you check?
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Battery fluid level.
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Engine oil level.
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All of the above.
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