Ontario Class E Practice Test · Question
Scenario 13: Spring (parking) brakes on an air-brake bus apply automatically when pressure falls to approximately:
Spring brakes apply automatically as pressure drops to about 20–45 psi. The correct answer is "20–45 psi". This capacity-fill scenario 13 reinforces the same co
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Question: Scenario 13: Spring (parking) brakes on an air-brake bus apply automatically when pressure falls to approximately:
Answer options: ✅ 20–45 psi
- 60–70 psi
- 85 psi
- 100 psi
Correct answer: 20–45 psi
Explanation: Spring brakes apply automatically as pressure drops to about 20–45 psi. The correct answer is "20–45 psi". This capacity-fill scenario 13 reinforces the same competency for the class2 bank and follows the certified explanation standard.
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