ASE T4 Brakes EXAM QUESTIONS WITH
|\ |\ |\ |\ |\ |\
ANSWERS
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 ANSWERS ✔✔The 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
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔3. The 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 ANSWERS ✔✔4.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The correct answer is D. Only a brake pedal with no free
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travel will cause all of the brakes to drag . Answer A - air
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the hydraulic system , will cause a spongy pedal , while
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
answer B - too high a vacuum to the power booster ,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
won't affect brake drag at all . 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 ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔5. The correct answer is C. Of the choices given , only
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
an out - of - round brake drum can cause pulsation in a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
hydrau lic brake system . Answer A , zero brake pedal free
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travel , will cause a dragging brake condition , but not
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pulsation . Answer B , glazed linings , will affect stopping
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
performance and noise , and 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 ANSWERS ✔✔6. The 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 ANSWERS ✔✔7. The 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 ANSWERS ✔✔8. The correct answer is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
B. Per Federal Motor Vehicle Safety Standard (FMVSS)
|\ |\ |\ |\ |\ |\ |\ |\ |\
121, the parking brakes must be able to hold a vehicle,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
|\ |\ |\ |\ |\ |\
ANSWERS
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 ANSWERS ✔✔The 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
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔3. The 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 ANSWERS ✔✔4.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The correct answer is D. Only a brake pedal with no free
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travel will cause all of the brakes to drag . Answer A - air
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
in the hydraulic system , will cause a spongy pedal , while
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
answer B - too high a vacuum to the power booster ,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
won't affect brake drag at all . 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 ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔5. The correct answer is C. Of the choices given , only
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
an out - of - round brake drum can cause pulsation in a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
hydrau lic brake system . Answer A , zero brake pedal free
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
travel , will cause a dragging brake condition , but not
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
pulsation . Answer B , glazed linings , will affect stopping
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
performance and noise , and 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 ANSWERS ✔✔6. The 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 ANSWERS ✔✔7. The 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 ANSWERS ✔✔8. The correct answer is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
B. Per Federal Motor Vehicle Safety Standard (FMVSS)
|\ |\ |\ |\ |\ |\ |\ |\ |\
121, the parking brakes must be able to hold a vehicle,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
