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Home/Practice quizzes/Single-unit air brakes

Single-unit air brakes practice quiz

Choose an answer, read the explanation, then continue to the next question. Your results include a review of every answer.

Single-unit air brakesQuestion 29 of 200
Correct14%4 of 29 answered
Incorrect86%25 of 29 answered

What allows ABS to reapply a brake after briefly releasing it?

AThe parking spring is manually caged.
BThe air dryer fills with water.
CThe wheel regains traction and its speed signal recovers.Correct answer
DThe safety valve opens at 150 psi.Your answer
Incorrect.

Once the wheel rolls again and the pulsing speed signal is restored, the ECU permits pressure to reapply. (Guide p. 185)

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