Brakes Todays Class

Front wheel drive vehicles typically have

• Front/rear split systems

• Diagonally Split systems

• Equal numbers of each

• Side to Side Split brake systems

Tech A says that brake fade occurs if the brakes create more heat than the can dissipate.

Tech B says that brake fade occurs by a fast dissipation of heat in the brake system that causes glazing on the brake lining

Who is correct?

• Tech A

• Tech B

• Both

• Neither

What percentage of the braking force comes from the rear brakes in a typical front wheel drive vehicle

• 10

• 30

• 50

• 70

Tech A says that if friction is too low, the brakes may require excessive pressure

Tech B says that if the friction is too low, the brakes may be overly sensitive

Who is correct?

• Tech A

• Tech B

• Both

• Neither

If a two square inch master cylinder piston moves one inch during braking, how far will it move a four square inch caliper piston?

• 2 inches

• 1 inch

• 1/2 inch

• 4 inches

The more weight a moving vehicle has, the

• more Kinetic Energy if possesses

• greater the tire footprint is

• less heat is needed to move the vehicle

• less stopping power it requires

On vehicles with rear drum brakes and front disc brakes, the metering ensures that drum brakes receive hydraulic pressure

• slightly before the disc brakes

• slightly after the disc brakes

• only during hard stops

• only if disc brakes fail

Which of the following statement is true?

• the smaller the tire's diameter is, the larger its footprint is

• the larger the tire's diameter is. the less braking power is required

• the larger the tires diameter is, the smaller its footprint is

• The larger the tire's footprint is, the more stopping power can be applied at the tire's contact point with the road

Pressure differential valves are spring-loaded plunger valves that are used to turn on dashboard warning lights if hydraulic pressure is lost in

• front brake systems only

• rear brake systems only

• either front or rear brake systems

• wheel cylinders or calipers only

proportioning valves___________?

• Prevent the front disc brakes from applying before the rear drum brakes

• prevent rear brake lockup during heavy braking

• equalize the fluid pressure between the two sides of a diagonally split brake system

• equalize the fluid pressure between the two sides of a front/rear split brake system