Ontario Class E Practice Test · Question
On a typical air-brake bus, the governor 'cut-in' pressure is approximately:
Compressor begins recharging at about 80–85 psi (cut-out around 120–135 psi).
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Question: On a typical air-brake bus, the governor 'cut-in' pressure is approximately:
Answer options:
- 40 psi
- 55 psi ✅ 80–85 psi
- 150 psi
Correct answer: 80–85 psi
Explanation: Compressor begins recharging at about 80–85 psi (cut-out around 120–135 psi).
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