1. What is a double air brake system?A 2 brake device, one opeprices the front brakes and one opeprices the back brakes. A two braking system, one for each side of the vehicle. A two braking device, one for daytime and also one for nighttime driving.2. What are the sabsence adjusters?It is the space in between the earlier wheels. It is an adjusting nut on the backside of the brake drum offered for adjusting the brakes. It is an adjusting nut under the cab to adjust the springs.3. How deserve to you examine the sabsence adjuster?Park on level ground, rotate off parking brakes, pull tough on each slack adjuster. It shouldn’t relocate more than one inch. Park on level ground, turn off parking brake and also press brake pedal. Park on an incline and also watch if the vehicle rolls.4. How deserve to you test the low pressure warning signal?While the engine is running, step on and off the brake pedal. Shut off the engine and see if the air press leaks dvery own. Shut off the engine with sufficient air press, revolve on the electrical power and also step on and also off the brake pedal until the low air press warning signal comes on.5. What have the right to you examine to watch if the spring brakes come on automatically?Step on and off the brake, via the engine off, the parking brake knob have to pop out as soon as air pressure drops between 20-40 psi. Get under the car and pull on the spring brakes. Turn on the engine and also pump the brake pedal down to the floor.6. What are the maximum leakage rates?Less than 4 psi in one minute for single vehicles and less than eight psi in one minute for combination vehicles. Less than 2 psi in one minute for single vehicles and less than three psi in one minute for combicountry vehicles. Less than 6 psi for all vehicles.7. Should you ever before leave your automobile unattfinished without applying parking brakes or chocking the wheels?Yes No8. If you are amethod from your auto just a short time, you don’t should usage the parking brake.True False9. How frequently should you drain air tanks?Daily Weekly Monthly10. The usage of brakes on a lengthy steep downgrade is only a supplement to the braking result of the engine.True False11. What components deserve to reason brakes to fade or fail?Not pushing the brake pedal tough enough. Over heating, low air push, and not relying on the engine braking effect.Not taking your foot off the accelerator pedal.12. Why must you be in the proper equipment before starting down a hill?So you just need to use the brake just hard sufficient to feel a definite slowdown. So you don’t have to shift gears going downhill. So you have the right to go with the gears on the method dvery own.13. If oil and water collect in the air tanks what have the right to take place to the brakes?The brakes can warmth up. The brakes might fail. The brakes can lock up.14. What is the function of an alcohol evaporator?So you don’t need to drainpipe the air tanks as frequently. To have actually a drink accessible if you obtain thirsty. To reduce the threat of ice in the brake valves and other components in cold weather.15. What is an additional name for managed 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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