Ontario Class B Practice Test · Question
Scenario 3: An air brake 'fan-out' test checks:
Charging the system from a low state to operating pressure within the required time confirms compressor function. The correct answer is "Air pressure build-up t
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Question: Scenario 3: An air brake 'fan-out' test checks:
Answer options: ✅ Air pressure build-up time
- Brake pad thickness
- Tyre wear
- Mirror alignment
Correct answer: Air pressure build-up time
Explanation: Charging the system from a low state to operating pressure within the required time confirms compressor function. The correct answer is "Air pressure build-up time". This capacity-fill scenario 3 reinforces the same competency for the class2 bank and follows the certified explanation standard.
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