ASE T4 Brakes Practice Exam With
Questions And Correct Verified Answers
| 2026/2027 Academic Cycle | Already
Graded A+ | 100% Assured Pass | Brand
New Version!!!!!!
2. The Driver Vehicle Inspection Report DVIR should be submitted :
A. according to the vehicle maintenance schedule
B. when a failure occurs
C. weekly
D. daily - CORRECT ANSWER The correct CORRECT ANSWER is D. Federal Motor Vehicle Safety
Standards ( FMVSS ) require the driver to submit a DVIR to their motor carrier or owner at the
end of each day . The DVIR is used to identify defects or deficiencies that would result in a
mechanical breakdown or effect the safe operation of a vehicle Once a driver submits the DVIR ,
a motor carrier or its agent must investigate and repair the defect or deficiency .
3. Which of the following cannot cause a drum on an air - braked vehicle to overheat ?
A. an over - tightened brake adjuster at that wheel
B. under - adjusted brake ( s ) elsewhere on the vehicle
C. too - high governor cut - out pressure
D. driving downhill in too high a gear. - CORRECT ANSWER 3. The correct CORRECT ANSWER is
C. The governor controls the air compressor output by unloading or cycling it . It has no direct
effect on the mechanical brake parts . While the pressure setting is important to maintain air
,brake system pressure within acceptable limits , an incorrect setting will not cause the drum on
an air - braked vehicle to overheat . All other choices given , however , will cause overheating
problems .
4. All the brakes drag on a truck with hydraulic brakes . Which of the following could be the
cause ? A. air in the hydraulic system
B. too high a vacuum supply to the power brake booster
C. a leaking secondary cup in the master cylinder
D. no brake pedal free travel - CORRECT ANSWER 4. The correct CORRECT ANSWER is D. Only a
brake pedal with no free travel will cause all of the brakes to drag . CORRECT ANSWER A - air in
the hydraulic system , will cause a spongy pedal , while CORRECT ANSWER B - too high a
vacuum to the power booster , won't affect brake drag at all . CORRECT ANSWER C , a leaking
secondary cup in the master cylinder , could increase pedal travel , but won't cause the brakes
to drag .
5. Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes ?
A. zero brake pedal free travel
B. glazed linings
C. an out - of - round brake drum
D. a frozen wheel cylinder piston. - CORRECT ANSWER 5. The correct CORRECT ANSWER is C.
Of the choices given , only an out - of - round brake drum can cause pulsation in a hydrau lic
brake system . CORRECT ANSWER A , zero brake pedal free travel , will cause a dragging brake
condition , but not pulsation . CORRECT ANSWER B , glazed linings , will affect stopping
performance and noise , and CORRECT ANSWER D , a frozen wheel cylinder , will de grade
stopping performance , but will not cause pulsation.
6. Air pressure gauges change an air pressure signal into an electronic voltage signal using which
of the following components ?
A. inductor
B. capacitor
, C. transducer
D. regulator - CORRECT ANSWER 6. The correct CORRECT ANSWER is C. An element inside an
air pressure transducer responds to air pressure increase or decrease, and the transducer
converts that pressure differentiation into a voltage signal, which is displayed in a proportionate
reading on the dash gauge.
7. Technician A says that linings worn too thin on an air - braked vehicle can cause the S -
camshaft to roll over . Technician B says this condition can cause excess brake pedal travel . Who
is right ?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER 7. The correct CORRECT ANSWER is A. The brake
adjuster is connected to a shaft that runs perpendicular to the plane formed by the pushrod and
slack adjuster. As the pushrod is extended, the shaft rotates. The shaft, in turn, is connected to
an S-shaped cam between the brake shoes. As the shaft rotates, so does the cam. The brake
shoes are forced apart and against the brake drum, creating the friction needed to slow the
vehicle. Thin brake linings can allow the S-cam to roll over, but will not affect brake pedal travel.
8. Spring brakes on an air - braked vehicle must be able to hold the vehicle facing uphill or
downhill on what percent grade ?
A. 10 %
B. 20 %
C. 30 %
D. 40 % - CORRECT ANSWER 8. The correct CORRECT ANSWER is B. Per Federal Motor Vehicle
Safety Standard (FMVSS) 121, the parking brakes must be able to hold a vehicle, loaded to its
gross weight rating, stationary on a smooth, dry, concrete roadway, facing uphill or downhill on
a 20% grade. In the emergency mode, the parking brakes must be able to exert a retarding force
equal to 28% of the gross axle rating.
Questions And Correct Verified Answers
| 2026/2027 Academic Cycle | Already
Graded A+ | 100% Assured Pass | Brand
New Version!!!!!!
2. The Driver Vehicle Inspection Report DVIR should be submitted :
A. according to the vehicle maintenance schedule
B. when a failure occurs
C. weekly
D. daily - CORRECT ANSWER The correct CORRECT ANSWER is D. Federal Motor Vehicle Safety
Standards ( FMVSS ) require the driver to submit a DVIR to their motor carrier or owner at the
end of each day . The DVIR is used to identify defects or deficiencies that would result in a
mechanical breakdown or effect the safe operation of a vehicle Once a driver submits the DVIR ,
a motor carrier or its agent must investigate and repair the defect or deficiency .
3. Which of the following cannot cause a drum on an air - braked vehicle to overheat ?
A. an over - tightened brake adjuster at that wheel
B. under - adjusted brake ( s ) elsewhere on the vehicle
C. too - high governor cut - out pressure
D. driving downhill in too high a gear. - CORRECT ANSWER 3. The correct CORRECT ANSWER is
C. The governor controls the air compressor output by unloading or cycling it . It has no direct
effect on the mechanical brake parts . While the pressure setting is important to maintain air
,brake system pressure within acceptable limits , an incorrect setting will not cause the drum on
an air - braked vehicle to overheat . All other choices given , however , will cause overheating
problems .
4. All the brakes drag on a truck with hydraulic brakes . Which of the following could be the
cause ? A. air in the hydraulic system
B. too high a vacuum supply to the power brake booster
C. a leaking secondary cup in the master cylinder
D. no brake pedal free travel - CORRECT ANSWER 4. The correct CORRECT ANSWER is D. Only a
brake pedal with no free travel will cause all of the brakes to drag . CORRECT ANSWER A - air in
the hydraulic system , will cause a spongy pedal , while CORRECT ANSWER B - too high a
vacuum to the power booster , won't affect brake drag at all . CORRECT ANSWER C , a leaking
secondary cup in the master cylinder , could increase pedal travel , but won't cause the brakes
to drag .
5. Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes ?
A. zero brake pedal free travel
B. glazed linings
C. an out - of - round brake drum
D. a frozen wheel cylinder piston. - CORRECT ANSWER 5. The correct CORRECT ANSWER is C.
Of the choices given , only an out - of - round brake drum can cause pulsation in a hydrau lic
brake system . CORRECT ANSWER A , zero brake pedal free travel , will cause a dragging brake
condition , but not pulsation . CORRECT ANSWER B , glazed linings , will affect stopping
performance and noise , and CORRECT ANSWER D , a frozen wheel cylinder , will de grade
stopping performance , but will not cause pulsation.
6. Air pressure gauges change an air pressure signal into an electronic voltage signal using which
of the following components ?
A. inductor
B. capacitor
, C. transducer
D. regulator - CORRECT ANSWER 6. The correct CORRECT ANSWER is C. An element inside an
air pressure transducer responds to air pressure increase or decrease, and the transducer
converts that pressure differentiation into a voltage signal, which is displayed in a proportionate
reading on the dash gauge.
7. Technician A says that linings worn too thin on an air - braked vehicle can cause the S -
camshaft to roll over . Technician B says this condition can cause excess brake pedal travel . Who
is right ?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER 7. The correct CORRECT ANSWER is A. The brake
adjuster is connected to a shaft that runs perpendicular to the plane formed by the pushrod and
slack adjuster. As the pushrod is extended, the shaft rotates. The shaft, in turn, is connected to
an S-shaped cam between the brake shoes. As the shaft rotates, so does the cam. The brake
shoes are forced apart and against the brake drum, creating the friction needed to slow the
vehicle. Thin brake linings can allow the S-cam to roll over, but will not affect brake pedal travel.
8. Spring brakes on an air - braked vehicle must be able to hold the vehicle facing uphill or
downhill on what percent grade ?
A. 10 %
B. 20 %
C. 30 %
D. 40 % - CORRECT ANSWER 8. The correct CORRECT ANSWER is B. Per Federal Motor Vehicle
Safety Standard (FMVSS) 121, the parking brakes must be able to hold a vehicle, loaded to its
gross weight rating, stationary on a smooth, dry, concrete roadway, facing uphill or downhill on
a 20% grade. In the emergency mode, the parking brakes must be able to exert a retarding force
equal to 28% of the gross axle rating.
