Commercial Drivers License Written Practice Tests

1. Are bolted to the wheels
2. Are located at each and of the vehicle's axles
3. Hold the brake shoes and linings
4. All of the above

1. Wait for air braks to come on automatically
2. Bring the vhicle to a safe stop while you still control the braks
3. Monitor your air pressure gauge and maintain highway speeds
4. Pump the brak pedal hrad to stop

1. The pressure has exceeded 150 psi
2. Too much air in the air compressor
3. Something is wrong,and you should have it checked by a mechanic
4. All of the above

1. 2 psi per minute
2. 3 psi per minute
3. 4 psi oer minute
4. None of the abo

1. Is an official vehicle inspection
2. Applies and releases the brake by using the brake pedal under normal driving
3. Are the valves that keeps the air tank pressure seviced
4. Is only on vehicles with hydraulic brakes

1. Pressure builds from 50 to 75 psi within three minutes
2. Pressure builds from 85 to 100 psi within 45 seconds
3. The compressor cuts out between 70 to 90 psi
4. The compressor stops between 75 to 90 psi

1. Reduce the risk of ice in brake valves during cold weather
2. Remove oil from the air lines
3. Reduce the risk of water in the air brake valve in warm weather
4. Remove fuel from the air lines

1. Once a week
2. Once day
3. Every four hours
4. Every two or three days

1. 150 psi
2. 200 psi
3. 100 psi
4. 175 psi

1. In the hoses
2. In the engine compartment
3. In the fuel tank
4. In the storage tank

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