FREE AND STUDY GAMES ABOUT DMV AIR BRAKE EXAM

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FREE AND STUDY GAMES ABOUT DMV AIR BRAKE EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -39 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: To check the free play of manual slack adjusters on S-cam brakes, you should

park on:

Answer:

Level Ground, chock the wheels, and turn off the parking brakes Question 2: 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 3: Which of these is not a proper time to apply the parking brakes? if the brakes are very hot, if you will only be stopped for less than one hour, if you're going to test parking brake to make sure that it hold the vehicle

Answer:

if the brakes are very hot Question 4: If your truck or bus has dual parking control valves, you can use the pressure from

the separate tank to:

Answer:

release the spring emergency/ parking brakes to move a short distance.

Question 5: If your truck or bus has dual parking control valves, you can use pressure from a

separate tank to:

Answer:

release the spring emergency/parking brakes to move a short distance.Question 6: Repeatedly pressing and releasing (fanning) the brake pedal may result in:

Answer:

The loss of brake air pressure Question 7: A straight truck or bus air brake system should not leak at a rate of more than ___psi per minute with the engine off and the brakes released

Answer:

• psi

Question 8: The Braking power of the spring brakes:

Answer:

depends on the service brakes being in adjustment Question 9: For air brake system in good condition, the air compressor should start pumping at about ___ PSI

Answer:

100 PSI

Question 10: The air compressor governor controls:

Answer:

when air is pumped into the air tanks Question 11: If your truck's air compressor has its own oil supply, when should you first check the oil level?

Answer:

before driving Question 12: The driver must be able to see a low air pressure warning which comes on before pressure in the service tank falls below ___ PSI

Answer:

60 PSI

Question 13: In air brake vehicles, the parking brakes should be used:

Answer:

anytime the vehicle is parked Question 14: The driver must be able to see a warning before air pressure in the service air tanks falls below ___ PSI

Answer:

60 PSI

Question 15: How should you check that the spring brakes come on when air pressure in the system drops below a certain level?

Answer:

Chock the wheels, release the parking brake, shut off the engine, and pump the brake pedal to reduce air tank pressure.Question 16: Excessive use of service brakes results in overheating, which can lead to: improper adjustment of the s-cam, increase contact between the brake drums and brake lining, expansion of the brake drums

Answer:

expansion of the brake drums Question 17: If your truck has a dual air system and one of the systems is low on pressure:

Answer:

Either the front or rear brakes will not be fully operational Question 18: The Brake system that applies and releases the brakes when the driver uses the brake pedal is the ___ brake system. Emergency, service, parking

Answer:

Service Question 19: IF you must make an emergency stop, you should brake so you:

Answer:

can steer and so your vehicle stays in a straight line

Question 20: the common type of foundation brake found on heavy vehicle is the

Answer:

S-cam drum Question 21: The Brake Pedal in an air brake ssystem: controls the speed of the air compressor, controls the air pressure applied to put on the brakes, is connected to slack adjusters by series of rods and linkage

Answer:

controls the air pressure applied to put on the brakes Question 22: Total Stopping Distance for air brakes is longer than that for hydraulic brakes due to _____ distance

Answer:

Brake Lag Question 23: Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?

Answer:

Stop right away and safely park. Continue only after the system is fixed.Question 24: The air brake lag distance at 55 mph on dry pavement adds about ___ feet to the stopping distance

Answer:

32 feet Question 25: The proper method of braking when going downhill after selecting proper gear is to brake until your speed is about ___ miles per hour below your "safe" speed, then release your brake

Answer:

• MPH

Question 26: The stop light switch

Answer:

turns on the brake lights to warn drivers behind you