ASE Brakes T4 Practice Test #1 ACTUAL EXAM QUESTIONS WITH
ASE Brakes T4 Practice Test #1
COMPLETE SOLUTION) (MULTIPLE CHOICES) (A+ GRADED 100%
Study online at https://quizlet.com/_e74601
VERIFIED) LATEST VERSION 2025
1. Which of the following could Answer A is incorrect. Glazed drum linings are hard and do not
cause the brakes on a truck to wear. They also do not stop the truck.
wear too fast? Answer B is correct. The wrong lining for the application may
A. Glazed Drums be the problem.
B. Wrong linings installed Answer C is incorrect. Low air pressure in the tanks would not
C. Low air pressure in the ser- cause brake wear. It may cause a low amount of reserve air in
vice tanks case of multiple brake applications.
D. Governor cut-out pressure Answer D is incorrect. High governor cut=out pressure may
too high cause the safety valve to open, but would not cause the brakes
to wear too fast.
2. Which of the following could Answer A is correct. Mismatched brake service chambers
case one brake on a truck to would apply unequal brake application pressure from side to
wear faster than the others? side, which would cause one brake to wear faster.
A. Mismatched service brake Answer B is incorrect. Mismatched parking brake chambers
chambers would not cause brake wear. It would possibly allow the brake
B. Mismatched parking brake to roll when parked, because one side could have insufficient
chambers parking brake application.
C. Low air pressure in the ser- Answer C is incorrect. Low air pressure in the tanks would not
vice tanks cause brake wear. It may cause a low amount of reserve air in
D. Governor cut-out pressure case of multiple brake applications
too low Answer D is incorrect. Low governor cut-out pressure may
cause an inadequate amount of air in reserve but would not
cause the brake to wear too fast.
3. There is an audible air leak A. A only
from under the dash when the B. B only
foot valve is applied. Techni- C. Both A and B
cian A says the double-check D. Neither A nor B
valve may be faulty. Technician Answer A is correct. A leaking double check valve could allow
B says the single-check valve air to flow to the foot valve and out the open exhaust
Answer B is incorrect. Single check valves are used to protect
, ASE Brakes T4 Practice Test #1
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may be the tanks. They do not cause an air leak when the brakes are
faulty. Who is correct? applied.
Answer C is incorrect. Technician B is incorrect.
Answer D is incorrect. Technician A is correct.
4. On a straight truck equipped Answer A is correct. The one way check valve should protect the
with air brakes, the secondary secondary tank. The check valve is leaking.
tank pressure gauge falls to Answer B is incorrect. The foot valve does not separate the wet
zero when she wet air tank is and secondary tanks.
drained. Technician A says the Answer C is incorrect. Technician B is incorrect.
one-way check valve may be Answer D is incorrect. Technician A is correct.
faulty.
Technician B says the foor
valve may be faulty. Who is cor-
rect?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
5. Which of the following could Answer A is incorrect. A faulty solenoid would not cause a wheel
set an antilock braking sys- speed sensor code. It could cause a modulator valve code.
tem (ABS) wheel speed sensor Answer B is incorrect. A faulty solenoid would not cause a
code: wheel speed sensor code. It could cause a modulator valve
A. Faulty modulator hold sole- code
noid Answer C is correct. A loose wheel bearing adjustment can
B. Faulty modulator release so- cause a faulty wheel speed sensor and a wheel speed sensor
lenoid code.
C. Incorrect wheel bearing ad- Answer D is incorrect. An incorrect brake adjustment may cause
justment a dragging brake but would not cause a wheel speed sensor
D. Incorrect brake adjustment code
, ASE Brakes T4 Practice Test #1
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6. The air drier purged too of- Answer A is incorrect. Technician B is also correct.
ten. Technician A says the air Answer B is incorrect. Technician A is also correct.
drier delivery check valve may Answer C is correct. A leaking air drier check valve will allow the
be leaking. Technician B says a wet tank to drain back through the air drier. This will cause air
leaking wet tank could be the pressure to drop to governor cut-in rapidly. The air compressor
cause. Who is correct? will again build tank pressure and unload, and the sequence
A. A only will start over. A leaking wet tank will cause the air pressure to
B. B only fall rapidly and the compressor to build air again and then cut
C. Both A and B out. This too will cause the air drier to purge often.
D. Neither A nor B Answer D is incorrect. Both technicians are correct.
7. The safety valve releases on Answer A is correct. If the line from the supply tank to the
the air tank. Which of the governor were plugged the governor would not unload the
following is the most likely compressor.
cause? Answer B is incorrect. The tractor protection valve could not
A. Plugged line from the supply cause excessive pressure.
tank to the governor Answer C is incorrect. A stuck spitter would prevent the air drier
B. Faulty tractor protection from purging.
valve Answer D is incorrect. A faulty secondary tank could leak, but
C. Stuck spitter on the air drier that would not cause excessive air pressure.
D. Faulty secondary tank
8. A truck with hydraulic Answer A is incorrect. If drum brakes are adjusted too loose the
disc/drum brakes has a high pedal will be low because the pedal will need to travel farther
firm pedal with poor stopping. to take up the clearance.
Which of the following could Answer B is correct. Glazed brake linings will not create the
be the cause? friction needed to stop the truck but will allow the pedal to feel
A. The brakes are adjusted too high and firm.
loose. Answer C is incorrect. A pushrod that is too long would cause
B. The brake linings are the brakes to drag.
glazed. Answer D is incorrect. The driveline parking brake adjustment
C. The brake pedal pushrod is
ASE Brakes T4 Practice Test #1
COMPLETE SOLUTION) (MULTIPLE CHOICES) (A+ GRADED 100%
Study online at https://quizlet.com/_e74601
VERIFIED) LATEST VERSION 2025
1. Which of the following could Answer A is incorrect. Glazed drum linings are hard and do not
cause the brakes on a truck to wear. They also do not stop the truck.
wear too fast? Answer B is correct. The wrong lining for the application may
A. Glazed Drums be the problem.
B. Wrong linings installed Answer C is incorrect. Low air pressure in the tanks would not
C. Low air pressure in the ser- cause brake wear. It may cause a low amount of reserve air in
vice tanks case of multiple brake applications.
D. Governor cut-out pressure Answer D is incorrect. High governor cut=out pressure may
too high cause the safety valve to open, but would not cause the brakes
to wear too fast.
2. Which of the following could Answer A is correct. Mismatched brake service chambers
case one brake on a truck to would apply unequal brake application pressure from side to
wear faster than the others? side, which would cause one brake to wear faster.
A. Mismatched service brake Answer B is incorrect. Mismatched parking brake chambers
chambers would not cause brake wear. It would possibly allow the brake
B. Mismatched parking brake to roll when parked, because one side could have insufficient
chambers parking brake application.
C. Low air pressure in the ser- Answer C is incorrect. Low air pressure in the tanks would not
vice tanks cause brake wear. It may cause a low amount of reserve air in
D. Governor cut-out pressure case of multiple brake applications
too low Answer D is incorrect. Low governor cut-out pressure may
cause an inadequate amount of air in reserve but would not
cause the brake to wear too fast.
3. There is an audible air leak A. A only
from under the dash when the B. B only
foot valve is applied. Techni- C. Both A and B
cian A says the double-check D. Neither A nor B
valve may be faulty. Technician Answer A is correct. A leaking double check valve could allow
B says the single-check valve air to flow to the foot valve and out the open exhaust
Answer B is incorrect. Single check valves are used to protect
, ASE Brakes T4 Practice Test #1
Study online at https://quizlet.com/_e74601
may be the tanks. They do not cause an air leak when the brakes are
faulty. Who is correct? applied.
Answer C is incorrect. Technician B is incorrect.
Answer D is incorrect. Technician A is correct.
4. On a straight truck equipped Answer A is correct. The one way check valve should protect the
with air brakes, the secondary secondary tank. The check valve is leaking.
tank pressure gauge falls to Answer B is incorrect. The foot valve does not separate the wet
zero when she wet air tank is and secondary tanks.
drained. Technician A says the Answer C is incorrect. Technician B is incorrect.
one-way check valve may be Answer D is incorrect. Technician A is correct.
faulty.
Technician B says the foor
valve may be faulty. Who is cor-
rect?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
5. Which of the following could Answer A is incorrect. A faulty solenoid would not cause a wheel
set an antilock braking sys- speed sensor code. It could cause a modulator valve code.
tem (ABS) wheel speed sensor Answer B is incorrect. A faulty solenoid would not cause a
code: wheel speed sensor code. It could cause a modulator valve
A. Faulty modulator hold sole- code
noid Answer C is correct. A loose wheel bearing adjustment can
B. Faulty modulator release so- cause a faulty wheel speed sensor and a wheel speed sensor
lenoid code.
C. Incorrect wheel bearing ad- Answer D is incorrect. An incorrect brake adjustment may cause
justment a dragging brake but would not cause a wheel speed sensor
D. Incorrect brake adjustment code
, ASE Brakes T4 Practice Test #1
Study online at https://quizlet.com/_e74601
6. The air drier purged too of- Answer A is incorrect. Technician B is also correct.
ten. Technician A says the air Answer B is incorrect. Technician A is also correct.
drier delivery check valve may Answer C is correct. A leaking air drier check valve will allow the
be leaking. Technician B says a wet tank to drain back through the air drier. This will cause air
leaking wet tank could be the pressure to drop to governor cut-in rapidly. The air compressor
cause. Who is correct? will again build tank pressure and unload, and the sequence
A. A only will start over. A leaking wet tank will cause the air pressure to
B. B only fall rapidly and the compressor to build air again and then cut
C. Both A and B out. This too will cause the air drier to purge often.
D. Neither A nor B Answer D is incorrect. Both technicians are correct.
7. The safety valve releases on Answer A is correct. If the line from the supply tank to the
the air tank. Which of the governor were plugged the governor would not unload the
following is the most likely compressor.
cause? Answer B is incorrect. The tractor protection valve could not
A. Plugged line from the supply cause excessive pressure.
tank to the governor Answer C is incorrect. A stuck spitter would prevent the air drier
B. Faulty tractor protection from purging.
valve Answer D is incorrect. A faulty secondary tank could leak, but
C. Stuck spitter on the air drier that would not cause excessive air pressure.
D. Faulty secondary tank
8. A truck with hydraulic Answer A is incorrect. If drum brakes are adjusted too loose the
disc/drum brakes has a high pedal will be low because the pedal will need to travel farther
firm pedal with poor stopping. to take up the clearance.
Which of the following could Answer B is correct. Glazed brake linings will not create the
be the cause? friction needed to stop the truck but will allow the pedal to feel
A. The brakes are adjusted too high and firm.
loose. Answer C is incorrect. A pushrod that is too long would cause
B. The brake linings are the brakes to drag.
glazed. Answer D is incorrect. The driveline parking brake adjustment
C. The brake pedal pushrod is
