Modulating control valve
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Trailer air supply control
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Relay valve
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Number of questions: | 25 |
Passing score: | 20 |
Modulating control valve
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Trailer air supply control
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Relay valve
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Presses the brake shoes against the inside of the brake drum.
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Presses the brake shoes against the brake linings.
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Presses the brake linings against the wheel axles.
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Is not available for vehicles with air brakes.
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Is not helpful in most driving situations.
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Can help you maintain control when braking.
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Air pressure
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Electricity
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Gasoline
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Reduce a vehicle's normal braking capacity.
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Are in addition to other braking systems and do not reduce a vehicle's braking power.
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Are not effective on larger vehicles.
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Thin.
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Properly tightened.
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Cracked.
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