Brakes

Michigan CDL Air Brakes Exam Complete Questions with Graded A+ Correct Answers 3 different braking systems that make up Air Brakes Service Brake, Parking Brake, Emergency Brake Air Compressor Pumps air into storage tanks and connected to the engine via gears or a v-belt. Air Compressor Governor Controls when the air compressor will pump air into the air storage tanks. When tank pressure rises to the cut-out level, the governor stops the compressor from pumping. When the tank pressu...

CDL Air Brakes |Complete Questions with Graded A+ Answers Air loss in a straight truck or bus should not be more than how much PSI with the engine off and the brakes on? 3 PSI in one minute To make an emergency stop with air brakes, using the stab braking method, you should Brake as hard as you can get off brakes when wheels lock get back on brakes when wheels start rolling again All vehicles with air brakes must have what signal? Low air pressure warning signal It is ac...

CDL Air Brakes |Complete Questions with Graded A+ Answers After every working day Oil and water usually collect in compresed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks? Why drain water from the compressed air tanks? Water can freeze in cold weather and cause brake failure. The air brake system for a straight truck or bus should not leak at a rate of more than __________ psi per minute with the engine off and the brakes released. 2 ...

Michigan Airbrake CDL Test |Complete Questions with A+ Graded Answers The air brake system on a commercial motor vehicle is comprised of three separate systems. Can you name them? Service, Parking, Emergency brake system How often should the air tank be drained in the air brake system? If it is a manual drain valve, it should be drained of water and contaminants at the end of every day's driving. At what PSI does the air compressor "cut out"? The air compressor will shut down or...

HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE Graded A+ AN ENGINE BRAKE (JACOBS BRAKE) A. IS A SELF-ENERGIZING SERVO TYPE. B. IS NORMALLY USED IN PLACE OF A SPRING BRAKE. C. RESTRICTS THE INTAKE PORT AND CAUSES A BUILD UP OF 30-45 LBS OF PRESSURE. D. OPENS THE EXHAUST VALVES NEAR THE TOP OF THE COMPRESSION STROKE TO RELEASE THE COMPRESSED AIR. (CORRECT AWNSER) IN THE SYSTEM SHOWN BELOW, THE PART AT C IS: A. AN INVERSION VALVE. (POSSIBLE CORRECT AWNSER) B. A SAFETY VALVE. C. A MOD...

Final Exam for Brakes Questions and Answers Graded A+ FMVSS Federal Motor Vehicle Safety Standard Antilock Braking Systems To prevent wheel lockup during excessive braking Kinetic Energy The energy in mass in motion Leverage To increase mechanical force and transfer it to the booster Compensating Port The port in the master cylinder that access fluid return to the reservoir Metering Valve It maintain pressure on the rear brakes Proportioning Valve It puts mo...

Aumt Brake Final Exam |Complete Questions with Graded A+ Answers Tech A says that parking brakes on drum brake vehicles use separate brake shoes for backup in an emergency. Tech B says that parking brakes on drum brake vehicles mechanically operate the standard drum brake shoes. Who iscorrect? Tech B Which of these drum brake systems uses servo action in both directions? Duo-servo drum brake systems Tech A says that brake shoe linings saturated with brake fluid from a leaky wheel cy...

CDX Brakes midterm answers Graded A+ All of the below statements are true except: A service brakes consist of drum and/or disc brakes and are operated by hand All of the below statements are true except: In drum brakes, the heat is created outside of the drum and transferred to the inner surface If we triple the speed of an object, the kinetic energy will: increase by nine times Medium and heavy duty. vehicles often require increased braking in situations........... exhaust b...

CDL Air Brake Practice Test|Complete Questions with A+ Graded Answers The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like: a. Fluid pressure b. Spring pressure c. Air pressure d. Any of the above b. Spring pressure 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 brake released. a. 1 b. 2 c. 3 d. 4 c. 3 Your vehicle has dual air...

Brakes Test 3 |Complete with A+ Graded Answers Both A & B are correct Technician A says that riveted disc brake pads are often quieter that bonded disc brake pads. Technician B says that integrally molded disc brake pads are molded into holes in the steel backing of the pads. Which technician is correct? Technician A only Neither A nor B are correct Both A & B are correct Technician B only A) Aid cooling Rotors are vented to: B) Increase strength D) Reduce the rotor weight C) Re...

Brake test questions and answers Graded A+ Disc brakes use replaceable friction material called? pads Drum brakes use replaceable friction material called? shoes Technician A says that a power-assisted brake system reduces stopping distance compared to nonpower-assisted brake system. Technician B says that the power-assisted brake system reduces the force that the driver must exert on the brake pedal. Which technician is correct? Technician B only Technician A says that all ve...

Brake test questions and answers Graded A+ 1) Why must air tanks be drained? a) For pre trip inspection purposes b) To check for leaks c) To release oil and water buildup d) To activate the low air pressure alarm c) To release oil and water buildup 2) What is a supply pressure gauge used for? a) To check tire pressure b) To check tank pressure c) To activate the low pressure alarm d) To check for leaks b) To check tank pressure 4) What are spring brakes? a) Hydraulic brakes...

Brake test questions and answers Graded A+ Both A & B are correct Technician A says that riveted disc brake pads are often quieter that bonded disc brake pads. Technician B says that integrally molded disc brake pads are molded into holes in the steel backing of the pads. Which technician is correct? Technician A only Neither A nor B are correct Both A & B are correct Technician B only A) Aid cooling Rotors are vented to: B) Increase strength D) Reduce the rotor weight C) Reduce...