Single-unit air brakes practice quiz

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Single-unit air brakesQuestion 10 of 200

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Below the holdback point, what pressure does an automatic front-wheel limiting valve deliver to steering-axle brakes?

AExactly half of reservoir pressureYour answer

BFull reservoir pressure

CNo application pressureCorrect answer

DSafety-valve pressure

Incorrect.

At very low applications, the automatic limiting valve holds steering-brake pressure at zero until the five- to 15-psi holdback point is exceeded. (Guide pp. 182-183)

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