Ontario Air Brake Practice · Question
Scenario 238: During the 7-step inspection, after warning activates, continued fanning should cause spring brakes to apply by approximately:
Continued fanning after the low-air warning should automatically apply spring (park) brakes at about 20–45 psi. The correct answer is "20–45 psi". This capacity
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Question: Scenario 238: During the 7-step inspection, after warning activates, continued fanning should cause spring brakes to apply by approximately:
Answer options:
- 10–20 psi ✅ 20–45 psi
- 60 psi
- 80 psi
Correct answer: 20–45 psi
Explanation: Continued fanning after the low-air warning should automatically apply spring (park) brakes at about 20–45 psi. The correct answer is "20–45 psi". This capacity-fill scenario 238 reinforces the same competency for the airbrake bank and follows the certified explanation standard.
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