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UPGRADE TO CDL PREMIUM
1.
Texting while operating a commercial motor vehicle is:
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acceptable if you are contacting your supervisor.
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only allowed at night.
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illegal.
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acceptable if you are contacting your dispacther.
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2.
Your vehicle has air brakes. To stop, you should:
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push the brake pedal down.
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release the accelerator, push in the clutch, and shift to Neutral at the same time.
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pull the parking brake control knob out.
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pump the brake pedal 3 times.
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3.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the brakes.
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something is wrong.
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the valve is fully operational.
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this will supply more power to the drive wheels.
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4.
To prevent a rollover, the driver should:
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make quick lane changes if possible.
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pay extra attention to the coolant level.
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drive on the shoulder if possible.
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drive slowly around corners, on ramps, and off ramps.
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5.
When driving with more than one trailer, the _______ trailer should be the first one behind the tractor.
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heaviest
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lightest
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shortest
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longest
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6.
In a dual air brake system, if one air system is very low on pressure:
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the effect won't be noticeable for the first 50 miles.
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you should pump the brakes to restore pressure.
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you should drive and brake as you always have.
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either the front or rear brakes will not be operating fully.
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7.
Air tank drains:
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are used to remove water and oil from the air tanks.
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are used to move air to the brakes.
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should not be used in wet weather.
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protect the tanks and the rest of the system from too much pressure.
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8.
When you push in the red trailer air supply knob, this will:
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open the emergency line shut-off valve at the rear of the last trailer.
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disconnect the air lines from the trailer.
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supply air to the emergency supply lines.
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disconnect the electrical connector.
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9.
Most heavy trucks with manual transmissions require ____ to change gears.
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double clutching
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single clutching
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triple clutching
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None of the above.
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10.
Which of the following will off-track the most?
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The rear wheels of the last trailer.
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The rear wheels of the tractor.
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The front wheels of the last trailer.
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The front wheels of the tractor.
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