Principles of braking

Which of the following frictional brake systems is used on vehicles today?

• drum brakes

• disk brakes

• air brakes

• all of the above

Which of the following is a method to control brake asbestos?

• Aqueous brake wash station

• HEPA brake dust vacuum system

• Both A and B

• None of the above

Which of the following can cause brake fade?

• heat

• water

• hydraulic

• All of the above

The amount of friction between two moving faces in contact with each other is expressed as a ratio and is called:

• fraction

• the coefficient of friction

• the coefficient of heat.

• None of the above

Excessive braking can cause which of the following brake conditions?

• warped brake rotors

• brake fade

• warped brake drums

• all of the above

Two students are discussing vehicle lift kits. Student A says that lift kits have no effect on braking or vehicle handling. Student B says that lift kits only affect handling, not braking. Who is correct?

• A

• B

• C both

• D neither

Brake systems not repaired properly can cause which of the following?

• accidents

• injury

• death

• all of the above

True or False. You should use lower gears in the transmission along with service brakes to descend a steep road grade.

• true

• false

Parking brake cables are susceptible to damage from which of the following?

• road hazards

• off-road use

• de-icing chemicals

• all of the above

Tech A says that disc brakes are used on the front of most vehicles built since the early 1970s and on the rear wheels of many vehicles. Tech B says that a disc brake operates by squeezing brake pads on both sides of a rotor or disc that is attached to the wheel. Who is correct?

• A

• B

• C both

• D neither