SECTION 5: AIR BRAKES QUESTIONS EXAM QUESTIONS

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SECTION 5: AIR BRAKES QUESTIONS EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -97 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: In a dual air brake system the 'secondary' system will usually operate the regular brakes on...?

Answer:

The front axle Question 2: When a brake pedal is pressed and the S-cam is turned, the S-cam:

Answer:

Presses the brake shoes against the inside of the brake drum.Question 3: In dual air brake systems, which of these will be individual to each system?

Answer:

Air tanks Air hoses All of them Air lines Question 4: If the pressure in a dual air system drops below 60 psi for one system but stays normal for another, you should...?

Answer:

Stop immediately and have it fixed

Question 5: In cold weather, an alcohol evaporator should be checked and filled:

Answer:

Every day Question 6: Air brake systems are three braking systems combined. They are:

Answer:

Service, Parking, Emergency Question 7: Spring brakes are usually fully activated when the air pressure is between...?

Answer:

20 - 30 psi

Question 8: What is the alcohol evaporator's primary purpose?

Answer:

Put alcohol into the air system. An alcohol evaporator puts alcohol into the air system to help reduce the risk of ice in cold weather.Question 9: The resistance you feel when you push the brake pedal down comes from...?

Answer:

A spring and air pressure Question 10: Which of the following statements is true regarding front wheel braking?

Answer:

Front wheel braking is good under all conditions.Question 11: Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

Answer:

Yellow Question 12: What can happen if the air pressure gets too low in an air brake system?

Answer:

The brakes may stop working.

Question 13: You pull the yellow diamond shaped knob out to put the parking brakes on. True or False?

Answer:

True

Question 14: Which of these brake systems uses a 'power screw'?

Answer:

Disc brakes Question 15: On older ABS systems, the malfunction lamp may not go out until you exceed...?

Answer:

• mph

Question 16: When you need to stop in an emergency, you should:

Answer:

Stop in a way that keeps your vehicle in a straight line.Question 17: Which of the following devices indicates how much pressure you have in your air tanks?

Answer:

Supply pressure gauge Question 18: A driver can rely on front wheel braking to work:

Answer:

Under all conditions.Question 19: The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

Answer:

• psi

Question 20: If air hoses connected to brake chambers are cut or worn, they should be...?

Answer:

Replaced

Question 21: In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

Answer:

45 Question 22: Which of the following is the most common type of foundation brake?

Answer:

S-cam drum brake.Question 23: Safety relief valves on the first tanks are usually set to open at...?

Answer:

150 psi Question 24: Many vehicles have automatic front wheel limiting valves, which will reduce air to the front brakes unless they are applied with a pressure of greater than...?

Answer:

60 psi Question 25: During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.

Answer:

• psi

Question 26: A dual air brake system:

Answer:

Consists of two separate air brake systems that share a single set of controls.

Question 27: A dual air brake system has how many separate air brake systems?

Answer:

Two Question 28: Vehicles will have automatic slack adjusters if they were built since...?

Answer:

1991