1501- Brake Systems

Which of the following fluids should be used in brake systems?

• Power steering fluid

• Engine oil

• Transmission oil

• None of the above

The customer complains of a high-pitched squeal whenever the wheels are turning, except when the brakes are applied. Technician A says the pads are worn and need replacement. Technician B says the rotors are scored and must be replaced. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

Technician A says a loss of hydraulic fluid disables the antilock brake system. Technician B says a loss of power booster pressure disables the antilock brake system. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

Technician A says understeer is a condition where the vehicle is slow to respond to steering changes. Technician B says oversteer occurs when the rear wheels try to swing around or fishtail. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

Stepping on the brake pedal while a brake drum is off can cause the pistons in the wheel cylinder to overextend or pop apart.

• True

• False

An accumulator unit is typically found on vehicles with _____.

• four-wheel disc brakes

• hydraulically assisted power brakes

• 
  vacuum-assisted power brakes

• Disc front and drum rear brakes

Before removing the master cylinder on an ABS system with a high-pressure accumulator, the accumulator must be discharged by ______.

• pumping the brake pedal 25 times with the ignition off

• loosening a bleeder screw on the master cylinder with the ignition on

• 
  

  loosening the accumulator one-eighth of a turn with the ignition switch off

• disconnecting the pump motor and pumping the brake pedal ten times

Technician A uses a dial indicator to measure parallelism. Technician B uses a dial indicator to measure runout. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

Caliper pistons that have threaded adjuster pushrods and internally threaded adjuster nuts are found on ______.

• Front wheel calipers

• Rear wheel calipers with auxiliary drum parking brakes

• Rear wheel actuating calipers

• All answers are correct

Caliper housings are made from ______.

• Cast iron

• Aluminum

• Both A and B

• Neither A or B