Alberta Air Brake (Q) Knowledge Test Practice Questions - Alberta Air Brake (Q Endorsement) Knowledge Test Exam - Variant 2

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According to Alberta's Commercial Driver's Guide, why is using only the trailer hand valve on steep hills not recommended?

It increases compressor cut-out safely It can overwork trailer brakes, cause unbalanced braking, and contribute to a jackknife risk It replaces the need for engine braking It cools the tractor brakes automatically

Correct Answer:

It can overwork trailer brakes, cause unbalanced braking, and contribute to a jackknife risk

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