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ASE A5 Practice Test Brakes Exam/44 Q’s and A’s
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ASE A5 Practice Test BrakesExam/44 Q’s and A’s
A vehicle with ABS anti-lock brakes has an audible clicking noise when it is
first started. The noise goes away after a few seconds. Technician A says this
is one of the hydraulic valves in the hydraulic valve assembly sticking.
Technician B says this is a normal condition. Who is correct? - -TECH B is
correct. The ABS system runs a system check when the key is first turned to
the ON position. The valves sometimes make a clicking noise during this
check.
-A hydro-boost brake system has reduced braking performance. Technician
A says to check the power steering system. Technician B says to check the
vacuum check valve. Who is correct? - -TECH A is correct. The power
steering pump produces pressure for the Hydro-Boost unit.
-A vehicle with power assisted brakes has a hard brake pedal. Which of the
following is LEAST likely to cause this condition?
A. Master cylinder.
B. Vacuum check valve.
C. Brake booster.
D. Low manifold vacuum. - -Answer A is correct. Faulty master cylinders do
not typically result in a hard brake pedal. Actually it's more common for a
faulty master cylinder to cause a low brake pedal that fades to the floor as it
is applied. This is the least likely component listed to result in a hard brake
pedal.
-A vehicle pulls to the left only when the brakes are applied. This condition is
MOST likely caused by:
A. A seized left front caliper.
B. A restriction in the left front brake line.
C. Leaking master cylinder cup seals.
D. A seized right front caliper. - -Answer D is correct. A frozen right front
caliper will cause the vehicle to pull to the left when braking.
-Technician A says accumulators are found only on non-integral ABS
systems. Technician B says some integral ABS units contain high pressure
accumulators that must be discharged before repair. Who is correct? - -TECH
B is correct. High pressure units can be dangerous and must be discharged
before removal. Always check with manufacturer's procedures before
disassembling an ABS unit
, -Technician A says ABS control units are programmed to ignore speed
sensor input variations below a certain threshold. Technician B says a one-
channel ABS system controls hydraulic pressure to the rear brake units. Who
is correct? - -Both technicians are correct.
-A vehicle's right front wheel has a growl that increases with vehicle speed.
The MOST likely cause is:
A. Excessive rotor lateral run out.
B. Warped rear brake drums.
C. Worn CV-Joint.
D. Worn wheel bearing. - -Answer D is correct. A worn wheel bearing will
cause a growl that increases with vehicle speed.
-Two technicians are discussing master cylinder residual check valves.
Technician A says the check valve is used on four wheel disc brake systems.
Technician B says the valve maintains pressure when the brakes are
released. Who is correct? - -Technician B is correct. The constant low
pressure, usually 6 psi to 8 psi keeps air from entering the wheel cylinders.
-The brake pad wear indicator light is illuminated on the instrument panel.
Technician A says this is because the brake pads have become
contaminated. Technician B says this is the pad wear sensor contacting the
brake rotor. Who is correct? - -TECH B is correct. When the sensors tip
contacts the rotor, the pad warning light illuminates on the instrument panel.
-The rear wheels of a vehicle are locking up only when the brakes are
applied. This is caused by a faulty:
A. Metering valve.
B. Pressure differential switch.
C. Proportioning valve.
D. Brake switch. - -Answer C is correct. The proportioning valve prevents
rear wheel lockup.
-Which of the following brake fluids are silicone based.
A. Dot 2
B. Dot 3
C. Dot 4
D. Dot 5 - -Answer D is correct. Dot 5 brake fluid is silicon based.
-A vehicle stops but the brake pedal fades completely to the floorboard
afterwards. There are no external leaks. Which of these is the MOST likely
cause of this condition.
A. Faulty vacuum brake booster.
B. Clogged vacuum booster check valve.
C. Dark discolored brake fluid.
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