To drain all the air out of the tank.
To drain moisture and oil out of the tank.
To keep anyone from moving the vehicle.
To prevent leakage
To tell you how much diesel is in the vehicle.
To tell you how much water is in the air tank.
To tell you how much air is in the air tank.
To tell you how much air is in the tires.
After every working day.
Once a week.
After every four hours of service.
Every other week.
The low boiling point of water reduces braking power.
Water will foul the air compressor oil.
Water can freeze in cold weather and cause brake failure.
Water over cools the compressor.
An air use gauge.
At least two brake heaters.
A backup hydraulic system.
A supply pressure gauge.
1 psi in 30 seconds.
1 psi in one minute.
2 psi in 45 seconds.
3 psi in one minute.
Pump the brake pedal rapidly and lightly.
Brake as hard as possible until the wheels lock, then release the brakes for as much time as the wheels were locked.
Brake as hard as possible until the wheels lock, then release the brakes until the wheels start rolling, and repeat.
Press hard on the brake pedal and apply full hand valve until you stop.
Pressure on the brake pedal is released and speed increases.
You have to push harder on the brake pedal to control your speed on a downgrade.
The brake feels spongy when pressure is applied.
Less pressure is needed on the brake pedal for each stop.
Park on level ground, chock the wheels, and release the parking brakes.
Stop on level ground and apply the parking brakes.
Park on level ground and drain off air pressure before adjusting.
Park on a slight grade, release the parking brake, apply the service brakes, and check for vehicle movement.
The tractor protection valve.
The emergency relay valve.
The one way check valve.
The air compressor.
Use stab braking.
Begin braking when you are 10 M.P.H above your safe speed.
Release the brake when you are 5 M.P.H below your safe speed.
Use the trailer brakes.
None of the above
At least two air tanks
An air pressure gauge to show the pressure available for braking
An air pressure gauge to show air used by the brake chambers for braking
None of the above
Service brake system.
Emergency brake system.
Parking brake system.
None of the above.
Brake lag distance.
Effective braking distance.
Open the air supply control valve.
Adjust the brake pedal for more travel.
Stop and park as soon as safely possible.
Can only be tested by highly trained brake service people.
Depends on the adjustment of the service brakes.
Increases when the service brakes are hot.
Is not affected by the condition of the service brakes.
When air is pumped into the air tanks.
Air pressure applied to the brakes.
The speed of the air compressor.
When the brake chambers release pressure.
Has been used on the trip.
Is in the air tanks.
Is being applied to the brakes.
None of these.
Here's an interesting quiz for you.