Ontario Air Brake Practice · Question
Under normal operating conditions, what should happen immediately after the governor cuts out?
When the governor reaches its cut-out pressure, it signals the compressor to stop pumping. Simultaneously, the air dryer typically purges accumulated moisture a
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Question: Under normal operating conditions, what should happen immediately after the governor cuts out?
Answer options:
- The low air warning light will activate.
- The air pressure gauge will drop rapidly. ✅ Air will be expelled with a 'hiss' sound from the air dryer's purge valve.
- The compressor will immediately cut back in.
Correct answer: Air will be expelled with a 'hiss' sound from the air dryer's purge valve.
Explanation: When the governor reaches its cut-out pressure, it signals the compressor to stop pumping. Simultaneously, the air dryer typically purges accumulated moisture and contaminants by expelling air with a characteristic 'hiss' sound.
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