Class 3 Theory Test Practice Questions - NZTA Class 3 Heavy Vehicle Theory Test - Medium Combination Exam

During a pre-trip inspection, how should you check the air brake system for leaks?

Listen for hissing sounds when the engine is off Build up full air pressure, turn off the engine, and monitor the pressure gauges for a drop exceeding the acceptable rate Check only the air tank drain valves Air brake leak checks are only done during annual CoF inspections

Correct Answer:

Build up full air pressure, turn off the engine, and monitor the pressure gauges for a drop exceeding the acceptable rate

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