1. What is a double air brake system?A two brake system, one operates the front brakes and also one operates the earlier brakes. A two braking system, one for each next of the vehicle. A 2 braking system, one because that daytime and one for nighttime driving.2. What room the slack adjusters?It is the an are between the ago wheels. It is one adjusting nut on the backside that the brake drum supplied for adjusting the brakes. It is an adjusting seed under the cab to change the springs.3. How deserve to you examine the slack adjuster?Park ~ above level ground, turn off parking brakes, pull tough on each slack adjuster. That shouldn’t move more than one inch. Park on level ground, revolve off parking brake and press brake pedal. Park on one incline and see if the auto rolls.4. How deserve to you test the low pressure warning signal?While the engine is running, action on and also off the brake pedal. Shut turn off the engine and also see if the air push leaks down. Shut turn off the engine with enough air pressure, revolve on the electric power and also step on and also off the brake pedal till the low air pressure warning signal comes on.5. What can you examine to watch if the feather brakes come on automatically?Step on and also off the brake, through the engine off, the parking brake knob must pop out when air press falls in between 20-40 psi. Get under the vehicle and pull on the spring brakes. Turn on the engine and also pump the brake pedal under to the floor.6. What are the preferably leakage rates?Less than four psi in one minute for single vehicles and less 보다 eight psi in one minute for combination vehicles. Less than two psi in one minute for single vehicles and also less than 3 psi in one minute for combination vehicles. Less than 6 psi for every vehicles.7. Have to you ever before leave your vehicle unattended without applying parking brakes or chocking the wheels?Yes No8. If you are away from your car only a short time, girlfriend don’t must use the parking brake.True False9. How often should you drainpipe air tanks?Daily Weekly Monthly10. The use of brakes on a long steep downgrade is just a complement to the braking impact of the engine.True False11. What factors can cause brakes to fade or fail?Not pressing the brake pedal difficult enough. Over heating, low air pressure, and not relying ~ above the engine braking effect.Not taking your foot off the accelerator pedal.12. Why need to you it is in in the ideal gear before beginning down a hill?So girlfriend only have to use the brake simply hard sufficient to feel a definite slowdown. So friend don’t have actually to transition gears walk downhill. So you deserve to go through the gears top top the means down.13. If oil and water collect in the waiting tanks what can occur to the brakes?The brakes can heat up. The brakes can fail. The brakes might lock up.14. What is the objective of one alcohol evaporator?So you don’t have to drain the air tanks together often. To have actually a drink available if you get thirsty. To minimize the danger of ice in the brake valves and other components in cold weather.15. What is another name for controlled 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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