Saskatchewan Air Brake Practice Questions - Saskatchewan Air Brake (Endorsement A) Exam

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If the tractor protection valve fails to close when trailer supply pressure drops below 20 psi, what is the primary risk?

The trailer spring brakes will cage themselves automatically The tractor's air supply will vent to the atmosphere, causing complete loss of tractor braking The governor will fail to cut out the compressor The vehicle's fuel consumption will increase dramatically

Correct Answer:

The tractor's air supply will vent to the atmosphere, causing complete loss of tractor braking

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