To determine if an intermittent ABS problem is related to an erratic wheel speed sensor signal, which of the following should be used?

• Ohmeter

• Voltmeter

• Scan tool

• Digital storage oscilloscope

A few minutes after the engine was turned off on a vehicle with vacuum power assist, the brake pedal is applied and it is hard to push. Technician A says that this is a normal condition. Technician B says that the booster check valve is leaking. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

The above measurement is made when replacing all of the following components EXCEPT:

• Master cylinder

• Vacuum power booster

• Brake caliper

• Master cylinder pushrod

During a brake inspection, an area of the vacuum brake booster below the master cylinder is found to be damp. Technician A says that this is a normal condition. Technician B says that any evidence of fluid indicates a leak and the master cylinder must be replaced. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

Technician A says that tapered roller bearings can be adjusted using a torque wrench. Technician B says that tapered roller bearings are adjusted using a dial indicator. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

What braking force is the primary braking force in a hybrid vehicle?

• Conventional hydraulic braking

• Engine braking

• Regenerative braking

• None of the above

Technician A says that, when testing a proportioning valve, the pressure at the outlet port to the rear brakes should rise at a faster rate, once transition pressure is reached. Technician B says that vehicles with diagonally-split hydraulic systems must have the proportioning valve tested twice. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

All of the following disc brake rotor measurements can be performed using a micrometer EXCEPT:

• Parallelism

• Thickness

• Runout

• Taper

Which of the following disc brake caliper designs usually allow the brake pads to be removed without removing the caliper?

• Fixed

• Floating

• Sliding

• All of the above

After applying the brake pedal several times to deplete the fluid reserve in the accumulator of a Hydro-Boost system, a technician applies the brake pedal with moderate pressure and starts the engine. What should the technician feel at the pedal if the Hydro-Boost system is operating properly?

• The pedal should initially rise before moving downward

• The pedal should initially move downward before rising up

• The pedal should move downward

• The pedal should rise