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Air Brake (Q Endorsement) Practice · Question

Which component is responsible for sensing the air pressure in the supply tank and controlling the air compressor's operation?

The governor is a pressure-sensitive device that directly controls when the air compressor pumps air into the system (cut-in) and when it stops pumping (cut-out

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Question: Which component is responsible for sensing the air pressure in the supply tank and controlling the air compressor's operation?

Answer options: ✅ The governor.

  • The air dryer.
  • The pressure relief valve.
  • The one-way check valve.

Correct answer: The governor.

Explanation: The governor is a pressure-sensitive device that directly controls when the air compressor pumps air into the system (cut-in) and when it stops pumping (cut-out) to maintain system pressure within a set range.

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