1. What is a dual air brake system?A two brake system, one operates the former brakes and one operates the earlier brakes. A 2 braking system, one because that each next of the vehicle. A two braking system, one for daytime and one for nighttime driving.2. What room the slack adjusters?It is the room between the back wheels. It is one adjusting seed on the backside the the brake drum used for adjusting the brakes. It is an adjusting nut under the cab to adjust the springs.3. How can you inspect the slack adjuster?Park on level ground, rotate off parking brakes, pull difficult on each slack adjuster. The shouldn’t move much more than one inch. Park on level ground, rotate off parking brake and also press brake pedal. Park on an incline and also see if the car rolls.4. How can you test the low press warning signal?While the engine is running, step on and off the brake pedal. Shut turn off the engine and see if the air push leaks down. Shut off the engine with sufficient air pressure, revolve on the electric power and step on and off the brake pedal till the short air push warning signal come on.5. What have the right to you examine to view if the spring brakes come on automatically?Step on and off the brake, through the engine off, the parking brake knob have to pop out as soon as air press falls in between 20-40 psi. Get under the vehicle and also pull top top the feather brakes. Turn ~ above the engine and pump the brake pedal down to the floor.6. What room the best leakage rates?Less than 4 psi in one minute for single vehicles and also less than eight psi in one minute for mix vehicles. Less than 2 psi in one minute for solitary vehicles and also less than three psi in one minute for mix vehicles. Less than 6 psi for every vehicles.7. Have to you ever leave your car unattended without applying parking brakes or chocking the wheels?Yes No8. If you are away native your auto only a quick time, friend don’t should use the parking brake.True False9. How frequently should you drain air tanks?Daily Weekly Monthly10. The use of brakes on a lengthy steep downgrade is just a supplement to the braking result of the engine.True False11. What factors can reason brakes to fade or fail?Not pressing the brake pedal difficult enough. Over heating, short air pressure, and not relying ~ above the engine braking effect.Not acquisition your foot off the accelerator pedal.12. Why should you be in the proper gear before starting down a hill?So girlfriend only have to apply the brake simply hard sufficient to feel a identify slowdown. So friend don’t have actually to transition gears going downhill. So you can go with the gears top top the method down.13. If oil and water collect in the waiting tanks what can take place to the brakes?The brakes could heat up. The brakes can fail. The brakes might lock up.14. What is the function of an alcohol evaporator?So friend don’t have to drain the air tanks together often. To have a drink obtainable if you gain thirsty. To reduce the danger of ice cream in the brake valves and also other parts in cold weather.15. What is an additional name for regulated braking?Steady braking Squeeze braking Hard braking

Answer Key

1. A  2. B  3. A  4. C  5. A  6. B  7. B  8. B  9. A  10. A  11. B  12. A  13. B  14.

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C  15. B

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