Air Brake Quiz

When a trailer without spring parking brakes is disconnected and left parked, you should make sure:

If your brakes do not seem to be holding even when air pressure is sufficient, you should:

In a dual circuit air system, the valve that protects the primary circuit from air loss in the secondary circuit is the:

The main purpose of the hand valve is to:

To stop a vehicle, the energy of motion is turned into:

When necessary, a driver should use the manual front wheel limiting valve on slippery roads:

The final factor in determining if a vehicle will move is the amount of:

Why should you lock the tractor glad hands to each other, or use dummy couplers when you are NOT towing a trailer?

A tug test on the trailer brakes should be done with the:

In a 105 PSI system, the governor will cause the compressor to return to its pumping stage at a pressure of:

In a dual circuit air system, air from the primary and secondary air reservoirs is directed to:

When a compressor discharge line is broken, total loss of air is prevented by the:

If the brakes are out of adjustment, the force of the spring brakes when applied will be:

When the foot and hand valve are operated at maximum at the same time, the application pressure will:

Responsibility for ensuring that the braking system is operational finally rests with the:

The weight of a vehicle is doubled. To stop in the same distance, the braking power must be increased:

The low pressure warning device activates at:

The foot valve:

Reservoirs should be drained at least:

The 20 lb range between the cut-in and cut-out of the governor serves to: