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ASE Brakes Exam/23 Questions with Complete Solutions
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ASE Brakes Exam/23 Questions withComplete Solutions
1) The brake pedal feels soft after the master cylinder has been replaced.
Technician A says that a leaking power booster could be the cause.
Technician B says that air in the hydraulic system could be the cause.
Who is right? - -B only
Explanation: A leaking power brake booster will cause the brake pedal to be
hard. Technician A's statement is false. Air in the hydraulic system may
cause the pedal to be soft. Technician B's statement is true. The correct
answer is B.
-2) A vehicle's brake pedal goes to the floor.
Technician A says that an internal master cylinder leak could be the cause.
Technician B says that seized wheel cylinder pistons could be the cause.
Who is right? - -A only
Explanation: Fluid bypassing the master cylinder primary cup may cause the
brake pedal to go to the floor. Technician A's statement is true. Seized wheel
cylinder pistons will not cause the brake pedal to go to the floor. Technician
B's statement is false. The correct answer is A.
-3) A vehicle pulls to the left during braking and pulls right without braking.
This could be caused by: - -a collapsed right front brake hose.
Explanation: Unequal tire pressure will cause a pull to one side with or
without braking. A failed master cylinder will not cause a pull. A seized left
front caliper will cause a pull to the right during braking. A collapsed right
front brake hose may trap pressurized fluid between the hose and the caliper
piston causing a pull to the right without brake application. The collapsed
hose may restrict fluid flow to the caliper piston when the brakes are applied,
causing a pull to the left. The correct answer is C.
-4) The front of the vehicle dips noticeably during braking on a vehicle with
disc/drum brakes. Which of these could be the cause? - -Stuck-open
metering valve
Explanation: The proportioning valve moderates pressure to the rear wheels.
A collapsed front brake hose or seized caliper pistons will not cause the
symptom. A stuck-open metering valve will allow the front brakes to apply
too soon causing the front of the vehicle to dip. The correct answer is B.
, -5) Technician A says that the bleeder valve on the caliper should be opened
when collapsing a caliper piston.Technician B says that the brake hose
should be clamped when collapsing a caliper piston.Who is right? - -A only
Explanation: The purpose of opening the bleeder is to prevent contaminated
fluid in the caliper from being pushed back into the hydraulic system.
Technician A's statement is true. The brake hose should never be clamped as
this may cause damage to the hose. Technician B's statement is false. The
correct answer is A.
-6) Technician A says that DOT 5 brake fluid can be substituted where DOT 3
brake fluid is specified.Technician B says that a scan tool may be required to
bleed the brakes on some vehicles.Who is right? - -B only
Explanation: DOT 5 brake fluid is not compatible with DOT 3 brake fluid.
Technician A's statement is false. Some vehicles with ABS or TCS may
require a scan tool to activate the system to properly bleed brakes.
Technician B's statement is true. The correct answer is B.
-7) A vehicle has a low brake pedal. Which of these could be the cause? - -A
seized star adjuster
Explanation: A stuck-open metering valve will not cause a pedal drop, nor
will a stuck-open proportioning valve or a seized caliper piston. A seized star
adjuster will lead to excessive clearance between the brake shoes and the
drum, requiring additional pedal travel. The correct answer is D.
-8) The primary shoe of the rear drum brake system shown is worn on the
top and the secondary shoe is worn on the bottom. Which of these could be
the cause? - -Weak hold-down springs
Explanation: Weak return springs or a seized parking brake cable can cause
excessive, but even brake shoe wear. A seized wheel cylinder piston will not
apply one of the brake shoes causing the described wear. The correct answer
is B.
-9) A vehicle has pulsating brakes.Technician A says that a brake rotor with
excessive lateral run-out could be the cause.Technician B says that corrosion
on the hub flange could be the cause.Who is right? - -Both A and B
Explanation: Excessive lateral run out is a common cause of brake pulsation.
This will be caused by a rotor with excessive lateral run-out or an uneven
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