Truck and bus parking or emergency brakes must be held on by:
a) Air pressure
b) A modulating control valve
c) Mechanical force
Answer: c) Mechanical force
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a) Air pressure
b) A modulating control valve
c) Mechanical force
Answer: c) Mechanical force
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.