ASE Practice Test (A5: Brakes) 2

Question 1

After brake service, the brake pedal is low and spongy. The technician bled the brakes repeatedly but the pedal condition persists. What should be suspected next?

Accepted Answer

A defective master cylinder that bypasses internally under pedal pressure

Answer

Air remaining in the calipers

Answer

Low brake fluid level in the reservoir

Answer

Incorrectly adjusted rear drum brakes

Question 2

A disc brake caliper slides freely on its mounting bolts when tested by hand, but the customer reports a pulling sensation to the right during braking. What is the MOST likely cause?

Accepted Answer

A collapsed brake hose on the left front that restricts fluid flow back to the master cylinder

Answer

Worn brake pads on the right caliper

Answer

Incorrect rotor thickness on the right front

Answer

Air in the right front brake line

Question 3

A customer states that the brake pedal pulsates during normal stops but not during ABS activation. What is the MOST likely cause?

Accepted Answer

Warped or thickness-variation (DTV) brake rotors

Answer

ABS modulator malfunction causing pedal pulsation

Answer

Air in the brake lines causing hydraulic pulsation

Answer

Loose wheel bearings allowing the rotor to wobble

Question 4

The parking brake on a rear disc brake vehicle does not hold the car on a slope. The service brakes work normally. What is the MOST likely cause?

Accepted Answer

Out of adjustment parking brake cable or seized rear caliper parking brake mechanism

Answer

Worn rear brake pads that contact but do not hold under parking loads

Answer

Failed ABS modulator affecting rear brake pressure

Answer

Worn rear brake rotors below minimum thickness

Question 5

A technician is measuring brake rotor thickness and finds it measures 0.870 inches. The minimum thickness cast into the rotor hat is 0.810 inches, and the discard thickness specification in the service manual is 0.803 inches. What is the correct action?

Accepted Answer

The rotor can be resurfaced if there is enough material above the discard spec

Answer

The rotor is usable; it is above both the cast thickness and the service manual discard spec

Answer

The rotor must be replaced because it is below the service manual discard spec

Answer

The rotor is at the discard thickness and must be replaced immediately

Question 6

A vehicle equipped with ABS stops normally in most situations, but the ABS activates prematurely during normal stops on dry pavement. A scan tool shows no ABS codes. What is the MOST likely cause?

Accepted Answer

A wheel speed sensor with excessive air gap or metallic debris on the reluctor ring

Answer

Failing ABS control module

Answer

Low brake fluid causing pressure fluctuations

Answer

Worn brake pads causing reduced braking force that triggers ABS