WorksheetsAir Brake Supply Circuit
Total questions: 10
Worksheet time: 5mins
What is the primary component of the air supply circuit in an air brake system?
Air compressor
Governor
Air dryer
Supply reservoir
What powers the air compressor in an air brake system?
The vehicle's electrical system
The vehicle's engine
An external power source
The vehicle's hydraulic system
What is the purpose of the governor in an air brake system?
To store compressed air
To compress air
To dry the air
To regulate air pressure in the supply reservoir
At what pressure does the governor typically cut out, stopping the compressor?
120 psi
90 psi
150 psi
100 psi
What is the function of the air dryer in an air brake system?
To cool the air
To remove contaminants and water vapor from the air
To store compressed air
To compress air
What happens when the supply reservoir pressure drops to the cut-in pressure of the governor?
The compressor stops compressing air
The air dryer starts the purge cycle
The compressor resumes compressing air
The safety valve opens
What is the purpose of the safety valve in an air brake system?
To control the compressor
To prevent over-pressurization
To regulate air pressure
To remove water from the air
What component ensures air flows in one direction only from the supply reservoir to the service reservoirs?
Governor
Air dryer
Single check valve
Purge valve
What triggers the air dryer's purge cycle?
When the vehicle's engine is turned off
When the air pressure reaches the governor cut out setting
When the air pressure drops to 100 psi
When the compressor stops compressing air
How is the air compressor lubricated?
By pressurized engine oil
By manual lubrication
It is self-lubricating
By a separate oil pump
