Ase T4 Brakes Exam Questions With Answers

ASE T4 Brakes EXAM QUESTIONS WITH
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ANSWERS

2. The Driver Vehicle Inspection Report DVIR should be
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submitted : |\ |\




A. according to the vehicle maintenance schedule
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B. when a failure occurs
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C. weekly |\ |\




D. daily - CORRECT ANSWERS ✔✔The correct answer is D.
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Federal Motor Vehicle Safety Standards ( FMVSS ) require
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the driver to submit a DVIR to their motor carrier or owner
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at the end of each day . The DVIR is used to identify
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defects or deficiencies that would result in a mechanical
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breakdown or effect the safe operation of a vehicle Once |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



a driver submits the DVIR , a motor carrier or its agent
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must investigate and repair the defect or deficiency .
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3. Which of the following cannot cause a drum on an air -
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braked vehicle to overheat ? |\ |\ |\ |\ |\




A. an over - tightened brake adjuster at that wheel
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B. under - adjusted brake ( s ) elsewhere on the vehicle
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C. too - high governor cut - out pressure
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D. driving downhill in too high a gear. - CORRECT
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ANSWERS ✔✔3. The correct answer is C. The governor |\ |\ |\ |\ |\ |\ |\ |\ |\

,controls the air compressor output by unloading or
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cycling it . It has no direct effect on the mechanical brake
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parts . While the pressure setting is important to maintain
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air brake system pressure within acceptable limits , an
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incorrect setting will not cause the drum on an air -
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braked vehicle to overheat . All other choices given ,
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however , will cause overheating problems . |\ |\ |\ |\ |\ |\




4. All the brakes drag on a truck with hydraulic brakes .
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Which of the following could be the cause ? A. air in the
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hydraulic system |\ |\




B. too high a vacuum supply to the power brake booster
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C. a leaking secondary cup in the master cylinder
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D. no brake pedal free travel - CORRECT ANSWERS ✔✔4.
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The correct answer is D. Only a brake pedal with no free
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travel will cause all of the brakes to drag . Answer A - air
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in the hydraulic system , will cause a spongy pedal , while
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answer B - too high a vacuum to the power booster ,
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won't affect brake drag at all . Answer C , a leaking
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secondary cup in the master cylinder , could increase |\ |\ |\ |\ |\ |\ |\ |\ |\



pedal travel , but won't cause the brakes to drag .
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5. Which of the following could cause a pulsating brake
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pedal on a truck with hydraulic brakes ?
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A. zero brake pedal free travel
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B. glazed linings
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,C. an out - of - round brake drum
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D. a frozen wheel cylinder piston. - CORRECT ANSWERS
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✔✔5. The correct answer is C. Of the choices given , only
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an out - of - round brake drum can cause pulsation in a
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hydrau lic brake system . Answer A , zero brake pedal free
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travel , will cause a dragging brake condition , but not
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pulsation . Answer B , glazed linings , will affect stopping
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performance and noise , and answer D , a frozen wheel |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



cylinder , will de grade stopping performance , but will
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not cause pulsation.
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6. Air pressure gauges change an air pressure signal into
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an electronic voltage signal using which of the following
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components ? |\ |\




A. inductor
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B. capacitor
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C. transducer
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D. regulator - CORRECT ANSWERS ✔✔6. The correct
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answer is C. An element inside an air pressure transducer
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responds to air pressure increase or decrease, and the
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transducer converts that pressure differentiation into a |\ |\ |\ |\ |\ |\ |\



voltage signal, which is displayed in a proportionate
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reading on the dash gauge. |\ |\ |\ |\




7. Technician A says that linings worn too thin on an air -
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braked vehicle can cause the S - camshaft to roll over .
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, Technician B says this condition can cause excess brake |\ |\ |\ |\ |\ |\ |\ |\ |\



pedal travel . Who is right ? |\ |\ |\ |\ |\ |\ |\




A. Technician A only
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B. Technician B only
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C. Both A and B
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D. Neither A or B - CORRECT ANSWERS ✔✔7. The correct
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answer is A. The brake adjuster is connected to a shaft
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that runs perpendicular to the plane formed by the
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pushrod and slack adjuster. As the pushrod is extended,
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the shaft rotates. The shaft, in turn, is connected to an S-
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shaped cam between the brake shoes. As the shaft
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rotates, so does the cam. The brake shoes are forced
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apart and against the brake drum, creating the friction
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needed to slow the vehicle. Thin brake linings can allow
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the S-cam to roll over, but will not affect brake pedal
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travel.


8. Spring brakes on an air - braked vehicle must be able
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to hold the vehicle facing uphill or downhill on what
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percent grade ? |\ |\ |\




A. 10 %
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B. 20 %
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C. 30 %
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D. 40 % - CORRECT ANSWERS ✔✔8. The correct answer is
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B. Per Federal Motor Vehicle Safety Standard (FMVSS)
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121, the parking brakes must be able to hold a vehicle,
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