ASE A5 Brakes p3

A vehicle equipped with four wheel disc brakes has poor braking performance and a low brake pedal. The cause could be:

• warped rear brake rotors

• Internal leak in master cylinder

• a seized caliper piston

• seized caliper slide pins

A vehicle is equipped with vacuum assisted power brakes. During normal driving, the brakes work properly. Immediately after the engine is turned off, the vehicle has no reserve power brake assist. This could be caused by:

• A leaking vacuum booster check valve

• a broke vacuum booster return spring

• a failed master cylinder

• an improper vacuum source

What could cause hard spots to form on a brake drum friction surface?

• Extreme Heat

• Water in the drum

• Worn shoes

• Leaking wheel cylinders

Which of these is the recommended procedure to tighten the axle nut when replacing a sealed wheel bearing assembly on a front wheel drive vehicle?

• Tighten the axle nut using an impact

• Tighten the axle nut to the correct torque using a torque wrench

• Tighten the axle nut until it is snug

• Tighten the axle nut to the correct torque and the back of 1/4 turn

Brake linings in current production (new) vehicles may be of any of the following construction, EXCEPT:

• asbestos

• metallic

• ceramic

• Semi-metallic

Technician A says that a low brake fluid level could cause the brake warning lamp to stay on. Technician B says that an open stoplight switch could cause the brake warning lamp to stay on. Who is right?

• Technician B

• Both

• Technician A

• Neither

On a passenger vehicle with duo-servo drum brakes, what happens?

• The primary shoe transfers force to the secondary shoe

• Rear braking force is controlled by ride height

• A split, dual/diagonal braking system is required

• The secondary shoe transfers force to the primary shoe

Technician A says that if the coefficient of friction is too low the brakes will grab. Technician B says that the coefficient of friction is influenced by the materials in contact. Who is right?

• Technician A

• Technician B

• Neither

• Both

A low fluid level in the brake master cylinder is an indication of all of these EXCEPT:

• Leakage at the wheel cylinders

• Leakage at the master cylinder

• Worn brake pads

• Worn brake shoes

What happens if a wheel speed sensor fault is set in the ABS control module?

• The MIL (Malfunction indicator lamp) illuminates

• The ABS and basic brakes become inoperative

• The ABS warning lamp illuminates

• The pedal pulsates during braking