Question 80 of 140

What does the 'governor' do in an air brake system?

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It only operates the parking brake valve
It controls when the air compressor pumps air into the tanks and when it stops, based on system pressure
It limits the maximum speed of the vehicle rather than the compressor's pressure cycle or cutout point
It measures brake lining thickness

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Correct answer to question 80 (Air Brakes): It controls when the air compressor pumps air into the tanks and when it stops, based on system pressure

Why

The governor monitors air pressure in the tanks and signals the compressor to start pumping (cut-in) when pressure drops and stop (cut-out) once the tanks reach full pressure.

Updated: November 2026

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What does the 'governor' do in an air brake system?

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