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Home/Practice quizzes/Combination air brakes

Combination air brakes practice quiz

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Combination air brakesQuestion 4 of 200
Correct100%4 of 4 answered
Incorrect0%0 of 4 answered
ICBC guide illustration showing a trailer hand control valve
The hand valve is used for trailer-only checks, not parking.

What does the illustrated trailer hand valve control?

AThe tractor steering brakes only
BThe fifth-wheel locking jaws
CThe trailer brakes independently of the tractor brakesYour answerCorrect answer
Correct.

The hand valve provides independent control of the connected trailer's service brakes. (Guide p. 173)

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Study aid only. These are not official ICBC exam questions, and practice scores do not predict an official test result.