ASE A5 Brakes Practice Test - Section 3- Disc Brake Diagnosis and Repair Questions with Verified Answers

ASE A5 Brakes Practice Test - Section 3- Disc Brake Diagnosis and Repair
Questions with Verified Answers


1. This question is not like the others. It has the word EXCEPT. For this question, look for the
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choice that could NOT cause the described situation. Read the entire question carefully be
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fore choosing your answer. All of these would cause a low brake pedal, EXCEPT:: Seized cali
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per piston i




d - A seized caliper piston could cause the pedal to be high with reduced braking power
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2. A spongy brake pedal on a vehicle with 4-
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wheel disc brakes with a longer than normal travel indicates which of the following?: Air inthe
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hydraulic system i




Air in the hydraulic system is the only choice that creates a spongy pedal.
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3. .A vehicle with 4-
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wheel disc brakes has a brake squeal.Technician A says a defective proportioning valve cou
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ld be the cause.Technician B says disc brake squeal is often caused by movement of the dis
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c brake pad during braking. Who is right?: B only
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- Disc brake squeal is often caused by movement of the disc brake pad during braking.To reduce
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disc brake squeal, all mating surfaces of the brake should be clean and lubricated.Always use O
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EM recommended clips and anti-
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squeal shims. To further reduce noise, do not machine a disc brake rotor more than absolutely n
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ecessary.TechnicianAiswrong because the proportioningvalveonlyaffects brake lockup and is n
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ot used on 4-wheel disc brakes only on disc/drum combinations.
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4. On a car with single piston floating caliper disc brakes, the disc brake pad between the cal
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iper piston and the rotor is badly worn.The other brake pad is slightly worn.Technician A says
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excessive rotor run out could be the cause. Technician B says insufficient clearance betwee
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n the pads and caliper slider could be the cause.Who is right?: B only
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- Insufficient clearance between the pads and caliper slider causes the slider not to move and on
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, ly applies one brake pad causing only that pad to wear.Technician A is wrong because excessive
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rotor runout will cause brake pulsations with no effect on wear.
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5. Which of the following problems would result in reduced brake pedal trav-
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el?: Piston frozen in the caliper
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- Pistonfrozeninthecaliperistheonlychoicethatwouldcausereducedbraketravel. If the piston is
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seized, you cannot push the fluid, resulting in reduced brake travel. Air in the hydraulic system an
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d low brake fluid level will result in a spongy pedal and loose wheel bearings will cause a pull.
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