Should always be used for parking.
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Should only be used for parking on a downhill.
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Should never be used for parking.
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Should only be used when transporting cargo.
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Number of questions: | 20 |
Passing score: | 16 |
Should always be used for parking.
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Should only be used for parking on a downhill.
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Should never be used for parking.
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Should only be used when transporting cargo.
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1972
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1987
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1998
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2004
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Move the vehicle forward slowly and apply the brakes with the brake pedal.
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Reverse the vehicle slowly and apply the brakes with the hand control.
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Reverse the vehicle slowly and apply the brakes with the brake pedal.
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Move the vehicle forward slowly and apply the brakes with the hand control.
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Bobtails stop very easily.
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Bobtails cannot drive as fast as tractors with semitrailers.
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Bobtails are more difficult to stop than tractors with semitrailers.
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Bobtails are illegal in most states.
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Will help you turn safely.
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Will stop your trailer safely.
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Can cause a skid.
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Is impossible.
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Opening the rear shut-off valves and listening for escaping air.
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Closing the rear shut-off valves and listening for escaping air.
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Disconnecting air supply lines and listening for escaping air.
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Rolling each trailer down a hill and testing the brakes.
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It is a square blue knob.
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It is a triangular yellow knob.
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It is an eight-sided red knob.
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It is a circular orange knob.
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