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Combination air brakes practice quiz

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Combination air brakesQuestion 6 of 200
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How does a wedge brake force its linings against the drum?

AThe wedge pushrod moves between two rollers.Your answerCorrect answer
BA slack adjuster rotates an S-cam.
CA hydraulic caliper squeezes a rotor.
DThe trailer supply line expands the drum.
Correct.

Air-chamber movement drives the wedge between rollers, spreading the linings into the drum. (Guide p. 178)

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