ASE MLR practice
Comprehensive Questions
(Frequently Most Tested) with
Verified Answers
a vehicles right front wheel has a growling noise that increases with vehicle speed. most likely cause is: -
Answer: a worn out wheel bearing will cause a growl that increases with speed.
White colored exhaust is billowing from the tailpipe of a vehicle. Which of the following is correct?
A. It has worn piston rings.
B. It has a leaking head gasket.
C. It has worn valve seals.
D. It has a leaking fuel injector. - Answer: Answer B is correct. A leaking head gasket results in a coolant
leak from the jacket into the cylinder producing white/gray exhaust.
An automatic transmission's fluid is pink and milky. Technician A says this is caused by engine
overheating. Technician B says the transmission could have been overfilled and the fluid has become
aerated. Who is correct? - Answer: No one is correct. Neither technician is correct, the ATF is
contaminated with coolant.
Technician A says fuel filters have an arrow that always points toward the fuel tank. Technician B says a
clogged fuel filter will reduce fuel pressure at the fuel rail. Who is correct? - Answer:
. A vehicle with power assist brakes has a hard brake pedal with little stopping power. Which of these is
the MOST likely cause of this condition?
A. The brake booster.
B. The master cylinder.
C. Air in the system.
, D. Contaminated brake fluid. - Answer:
a vehicle pulls to the left only while braking. technician A says this could be a restricted left break line.
technician B says this could be a frozen right caliper. who is correct? - Answer: it is technician B because
a frozen right front caliper will cause the vehicle to pull to the left when breaking. and if it were the front
break line wit would cause the vehicle to turn right not left. because the right front break has more
stopping power.
a vehicles air conditioner blows cold air while driving at normal speeds, but warm while at a stop lights.
the LEAST likely cause of this condition is: - Answer: a frozen expansion valve: this is the least likely type
question. once the expansion valve freezes, the air conditioner would have poor performance at all
speeds
a technician runs a scan and receives a fault code indicating a problem in the MAF sensor circuit.
technician A says this could be caused by a loose wire or an intermittent open. technician B says this
could be caused by a faulty MAF sensor. who is correct? - Answer: Both A and B are correct.
a vehicle blows blue gray exhaust from its tailpipe only when first started in the morning. the MOST
likely cause of this condition is: - Answer: a leaking valve seal will cause oil to leak into the cylinder's
chamber over time, usually overnight, resulting in blue gray exhaust at first start.
the headlights get brighter as the engine is revved. Technician A says this is caused by a high capacity
battery. Technician B says this is caused by a faulty voltage regulator. who is correct? - Answer:
Technician B is correct. at the heart of the charging system is the alternator, if the alternator outputs
excessive or high charging voltage, check voltage regulation; electrical components, and electronics will
be affected. and because the battery is primarily used to start up the engine.
A vehicle with a power rack and pinion steering system is binding only while turning corners. which of
these are least likely to cause this condition? - Answer: worn rack bushings can cause a vehicle to
wander. this is a least likely type question.
A technician is bleeding air from a hydraulic power steering system. all of the following statements are
true except...
A) raise the front tires in the air.
Comprehensive Questions
(Frequently Most Tested) with
Verified Answers
a vehicles right front wheel has a growling noise that increases with vehicle speed. most likely cause is: -
Answer: a worn out wheel bearing will cause a growl that increases with speed.
White colored exhaust is billowing from the tailpipe of a vehicle. Which of the following is correct?
A. It has worn piston rings.
B. It has a leaking head gasket.
C. It has worn valve seals.
D. It has a leaking fuel injector. - Answer: Answer B is correct. A leaking head gasket results in a coolant
leak from the jacket into the cylinder producing white/gray exhaust.
An automatic transmission's fluid is pink and milky. Technician A says this is caused by engine
overheating. Technician B says the transmission could have been overfilled and the fluid has become
aerated. Who is correct? - Answer: No one is correct. Neither technician is correct, the ATF is
contaminated with coolant.
Technician A says fuel filters have an arrow that always points toward the fuel tank. Technician B says a
clogged fuel filter will reduce fuel pressure at the fuel rail. Who is correct? - Answer:
. A vehicle with power assist brakes has a hard brake pedal with little stopping power. Which of these is
the MOST likely cause of this condition?
A. The brake booster.
B. The master cylinder.
C. Air in the system.
, D. Contaminated brake fluid. - Answer:
a vehicle pulls to the left only while braking. technician A says this could be a restricted left break line.
technician B says this could be a frozen right caliper. who is correct? - Answer: it is technician B because
a frozen right front caliper will cause the vehicle to pull to the left when breaking. and if it were the front
break line wit would cause the vehicle to turn right not left. because the right front break has more
stopping power.
a vehicles air conditioner blows cold air while driving at normal speeds, but warm while at a stop lights.
the LEAST likely cause of this condition is: - Answer: a frozen expansion valve: this is the least likely type
question. once the expansion valve freezes, the air conditioner would have poor performance at all
speeds
a technician runs a scan and receives a fault code indicating a problem in the MAF sensor circuit.
technician A says this could be caused by a loose wire or an intermittent open. technician B says this
could be caused by a faulty MAF sensor. who is correct? - Answer: Both A and B are correct.
a vehicle blows blue gray exhaust from its tailpipe only when first started in the morning. the MOST
likely cause of this condition is: - Answer: a leaking valve seal will cause oil to leak into the cylinder's
chamber over time, usually overnight, resulting in blue gray exhaust at first start.
the headlights get brighter as the engine is revved. Technician A says this is caused by a high capacity
battery. Technician B says this is caused by a faulty voltage regulator. who is correct? - Answer:
Technician B is correct. at the heart of the charging system is the alternator, if the alternator outputs
excessive or high charging voltage, check voltage regulation; electrical components, and electronics will
be affected. and because the battery is primarily used to start up the engine.
A vehicle with a power rack and pinion steering system is binding only while turning corners. which of
these are least likely to cause this condition? - Answer: worn rack bushings can cause a vehicle to
wander. this is a least likely type question.
A technician is bleeding air from a hydraulic power steering system. all of the following statements are
true except...
A) raise the front tires in the air.
