CDL AIR BRAKES PRACTICE TEST - NORTH DAKOTA
11.
When going down a steep downgrade, you should:
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use escape ramps whenever possible.
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use the parking brake.
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use a low gear, and a proper braking technique.
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avoid braking and rely on engine braking.
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12.
What should you do to test your vehicle's low air pressure warning signal?
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With the engine running, put the vehicle in a forward gear and attempt to drive forward.
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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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With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.
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Pump the brakes until the air pressure drops below 80 psi.
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13.
A tank endorsement is:
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required for both liquids and gases.
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not required when transporting hazardous materials.
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only required when transporting gases.
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only required when transporting liquids.
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14.
If you get stuck on railroad tracks, you should:
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have a helper push your vehicle.
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check the engine compartment quickly.
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stay in the vehicle and call for help.
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get out of the vehicle and away from the tracks.
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15.
Older trailers do not have spring brakes. If the air supply leaks away:
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the ABS won't work properly.
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there will be no emergency brakes.
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the trailer will stop normally.
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All of the above.
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