FREE AND STUDY GAMES ABOUT AIR BRAKES EXAM

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FREE AND STUDY GAMES ABOUT AIR BRAKES EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -35 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: If your vehicle has an alcohol evaporator, it is there to:

Answer:

reduce the risk of ice in air brake valves in cold weather Question 2: When using the parking brakes or emergency brakes, what type of pressure is being used?

Answer:

SPRING PRESSURE

Question 3: Which of the following is okay to find in the air brake system?

Answer:

AIR Question 4: If your vehicle has an alcohol evaporator, every day during cold weather you

should:

Answer:

check and fill the alcohol level

Question 5: Modern air brake systems combine 3 different systems. These are the service

brakes, the parking brakes and the:

Answer:

Emergency Breaks Question 6: What will determine how effective the spring emergency brakes or the parking brakes work?

Answer:

depends on the adjustment of the service brakes Question 7: The braking power of the spring brakes:

Answer:

depends on the adjustment of the service brakes Question 8: When should you test the parking brake? When the vehicle is:

Answer:

parked Question 9: You should know that your brakes are fading when:

Answer:

you have to push harder on the brake pedal to control your speed on a downgrade

Question 10: How can you test the low pressure warning signal?

Answer:

Shut off the engine with enough air pressure, turn on the electrical power and step on and off the brake pedal until the low air pressure warning signal comes on Question 11: When you have to make a quick emergency stop, you should brake in a way that

allows you to:

Answer:

Continue in a straight line and maintain steering control

Question 12: In air brake equipped vehicles, you use the parking brakes when?

Answer:

whenever you park the vehicle

Question 13: What is a dual air brake system?

Answer:

a two brake system, one operates the front brakes and one operates the back brakes

Question 14: Why drain water from compressed air tanks?

Answer:

Water can freeze in cold weather and cause brake failure

Question 15: What is another name for controlled braking?

Answer:

squeeze braking

Question 16: What are the 3 different systems in Air Brake Systems?

Answer:

Service Brakes, Parking Brakes, Emergency Brakes Question 17: Air brake equipped vehicles must have:

Answer:

a supply pressure gauge Question 18: A combination vehicle air brake system cannot leak more than ___ psi per minute with the engine off and the brakes released.

Answer:

3 Question 19: The air loss rate for a straight truck or bus with the engine off and the brakes on

should not be more than:

Answer:

• psi in one minute

Question 20: The air compressor governor controls:

Answer:

when air is pumped into the air tanks

Question 21: Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain air tanks?

Answer:

After every working day Question 22: In air brake vehicles, the parking brakes should be used:

Answer:

whenever the vehicle is parked Question 23: On long downhill grades, experts recommend using a low gear and light, steady pedal pressure instead of on-again and off-again braking. Why?

Answer:

Air usage is less with light steady pressure Brake linings do not heat up as much with light pressure You can keep vehicle speed constant in a low gear with light, steady pressure (All of the above)

Question 24: What are slack adjusters?

Answer:

It is an adjusting nut on the backside of the brake drum used for adjusting the brakes Question 25: Air braking takes more time that hydraulic braking because air brakes:

Answer:

need to have air flow through the lines to work Question 26: What can legally hold a parking or emergency or emergency brake in position for a truck, truck tractor or bus?

Answer:

spring pressure Question 27: Air loss in a single vehicle (not a combination unit) should not be more that _____ with the engine off and the brakes on.

Answer:

• psi in one minute