CDL AIR BRAKES PRACTICE TEST - NEW HAMPSHIRE
21.
How do you check that spring brakes come on automatically?
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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On single vehicles, continue to step on and off the brake pedal until the parking brake valve pops out.
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All of the above.
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22.
What should you do to test your vehicle's low air pressure warning signal?
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Release the parking brake valve and the tractor protection valve and reduce the air pressure by stepping on and off the brake pedal.
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Pump the brakes until the air pressure drops below 80 psi.
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With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.
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With the engine running, put the vehicle in a forward gear and attempt to drive forward.
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23.
If your vehicle catches fire, you should pull over:
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at a service station.
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near trees.
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near other vehicles.
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in an open area.
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24.
After starting the engine, oil pressure should rise to a normal level:
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within seconds.
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within 6 minutes.
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within 2 minutes.
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within 3 miles.
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25.
To prevent rollover, you should:
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place the cargo near the front of the trailer.
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place the cargo near the rear of the trailer.
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put the lightest parts of the cargo under the heaviest parts.
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keep the cargo as close to the ground as possible.
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