Brakes being exposed to sunlight.

Brakes being exposed to moisture.

Excessive use of the brakes.

Spring brakes

Parking brakes

Air brakes

Turning on the engine and applying the trailer hand brake.

Rapidly pressing and releasing the brake pedal.

Removing wheel chocks and disengaging the parking brake.

Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.

Apply the brakes about halfway, but keep the wheels rolling.

Fully apply the brakes, let the wheels lock up, and hold the brake pedal down, keeping the wheels locked until the vehicle stops.

Apply the emergency brake.

Water and oil

Ammonia

Wood

Chlorine

Is not recommended on vehicles with air brakes.

Is required on vehicles with air brakes.

Is optional on vehicles with air brakes.

Lock the wheels and skid to a stop.

Stop in a way that keeps your vehicle in a straight line.

Stop in a way that turns your vehicle.

Expect your vehicle to slow down more quickly than usual.

An effective tool for stopping large vehicles.

Prohibited on large vehicles.

Only effective in poor weather.

A tool to improve fuel efficiency.

Controls when the air compressor pumps air into the air storage tanks.

Controls how quickly air leaves the air storage tanks.

Controls the temperature of the air entering the air storage tanks.

Controls the temperature of the air leaving the air storage tanks.

Green

Blue

Yellow

Is not required on vehicles with air brakes.

Is required on vehicles with air brakes.

Is optional on vehicles with air brakes.

An extra set of brakes.

Voice-activated brakes.

Cruise control.

Anti-Lock Braking Systems (ABS).

Air pressure

Mechanical

Heavy

Electrical

Opened to drain the tanks after each day.

Left open while driving.

Sealed with glue.

Only on packed snow.

Under all conditions.

Only if the road is dry.

Under most conditions.

10 psi in one minute

5 psi in one minute

3 psi in one minute

S-cam drum brake.

C-cam drum brake.

G-cam disc brake.

P-cam disc brake.

When the air compressor pumps air into the air storage tanks.

How fast air is pumped into the air storage tanks.

The temperature of air pumped into the air storage tanks.

The speed of the vehicle.

Orange

Yellow

Green

Blue

Pull the air brake lever.

Engage the brake lever.

Push the brake pedal down.

Pull the brake pedal up.

Allow rain water to enter the tanks.

Are used to drain water and oil from the air tanks.

Should never be opened.

Must remain open while driving.

Single

Dual

Triple

Quad

3 psi in one minute.

6 psi in one minute.

8 psi in one minute.

4 psi in one minute.

Allow rain water to enter an air tank.

Are used to drain water and oil from an air tank.

Should never be opened.

Must remain open during driving.

Only be used by mechanics.

Only be used when it is wet outside.

Be used to drain the tanks completely.