ASE A5 Actual Exam Questions

ASE A5 Actual Exam Questions and Answers;100% Verified A hydro-boost brake system has reduced braking performance. Technician A says to check the power steering system. Technician B says to check the vacuum check valve.Who is correct? Answer- TECH A is correct. The power steering pump produces pressure for the Hydro-Boost unit.A vehicle with power assisted brakes has a hard brake pedal. Which of the following is LEAST likely to cause this condition?

• Master cylinder.
• Vacuum check valve.
• Brake booster.
• Low manifold vacuum. Answer- Answer A is correct. Faulty master cylinders do not

typically result in a hard brake pedal. Actually it's more common for a faulty master cylinder to cause a low brake pedal that fades to the floor as it is applied. This is the least likely component listed to result in a hard brake pedal.A vehicle pulls to the left only when the brakes are applied. This condition is MOST

likely caused by:

• A seized left front caliper.
• A restriction in the left front brake line.
• Leaking master cylinder cup seals.
• A seized right front caliper. Answer- Answer D is correct. A frozen right front caliper

will cause the vehicle to pull to the left when braking.Technician A says accumulators are found only on non-integral ABS systems.Technician B says some integral ABS units contain high pressure accumulators that must be discharged before repair. Who is correct? Answer- TECH B is correct. High pressure units can be dangerous and must be discharged before removal. Always check with manufacturer's procedures before disassembling an ABS unit Technician A says ABS control units are programmed to ignore speed sensor input variations below a certain threshold. Technician B says a one-channel ABS system controls hydraulic pressure to the rear brake units. Who is correct? Answer- Both technicians are correct.A vehicle's right front wheel has a growl that increases with vehicle speed. The MOST

likely cause is:

• Excessive rotor lateral run out.
• Warped rear brake drums.
• Worn CV-Joint. 1 / 4

• Worn wheel bearing. Answer- Answer D is correct. A worn wheel bearing will cause

a growl that increases with vehicle speed.Two technicians are discussing master cylinder residual check valves. Technician A says the check valve is used on four wheel disc brake systems. Technician B says the valve maintains pressure when the brakes are released. Who is correct? Answer- Technician B is correct. The constant low pressure, usually 6 psi to 8 psi keeps air from entering the wheel cylinders.The brake pad wear indicator light is illuminated on the instrument panel. Technician A says this is because the brake pads have become contaminated. Technician B says this is the pad wear sensor contacting the brake rotor. Who is correct? Answer- TECH B is correct. When the sensors tip contacts the rotor, the pad warning light illuminates on the instrument panel.A vehicle with ABS anti-lock brakes has an audible clicking noise when it is first started.The noise goes away after a few seconds. Technician A says this is one of the hydraulic valves in the hydraulic valve assembly sticking. Technician B says this is a normal condition. Who is correct? Answer- TECH B is correct. The ABS system runs a system check when the key is first turned to the ON position. The valves sometimes make a clicking noise during this check.The rear wheels of a vehicle are locking up only when the brakes are applied. This is

caused by a faulty:

• Metering valve.
• Pressure differential switch.
• Proportioning valve.
• Brake switch. Answer- Answer C is correct. The proportioning valve prevents rear

wheel lockup.Which of the following brake fluids are silicone based.

• Dot 2
• Dot 3
• Dot 4
• Dot 5 Answer- Answer D is correct. Dot 5 brake fluid is silicon based.

A vehicle stops but the brake pedal fades completely to the floorboard afterwards.There are no external leaks. Which of these is the MOST likely cause of this condition.

• Faulty vacuum brake booster.
• Clogged vacuum booster check valve.
• Dark discolored brake fluid.
• Master cylinder cup seals. Answer- Answer D is correct. Master cylinder cup seals

wear and create an internal leak. The pedal fades to the floor as fluid bypasses the seal.Two technicians are inspecting a brake drum for wear. Technician A says if the brake drum has small cracks along it's inside lining it should be replaced. Technician B says if 2 / 4

a brake drum has minor pitting along it's inside lining it may be resurfaced. Who is correct? Answer- Both technicians are correct.The brake shoes on the rear of a vehicle are worn and must be replaced. Technician A says the primary shoe faces the front of the vehicle. Technician B says the lining of the primary shoe must be riveted to the shoe plate. Who is correct? Answer- TECH A is correct. Also the primary shoe usually has a shorter lining than the secondary.Technician A says double flare copper tubing is used for brake lines. Technician B says single flare steel tubing is used for brake lines. Who is correct? Answer- Neither technician is correct.The left front brake of a four wheel disc brake system is dragging. Which of these is LEAST likely to cause this condition?

• Glazed brake pads.
• Restriction in the brake line.
• Rusted caliper slides.
• Twist in the brake hose. Answer- Answer A is correct. Glazed brake pads result

from excessive heat. This heat can be caused by a dragging brake unit. Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance.A vibration is felt in the steering wheel only while braking. Technician A says excessive lateral runout on the front rotors will result in this condition. Technician B says to use a dial indicator to check lateral runout. Who is correct? Answer- Both technicians are correct.Technician A says to use the original brass washer when installing a new flexible brake hose. Technician B says to use a compression fitting to repair a small leak in a stainless steel brake line. Who is correct? Answer- Neither technician is correct.

A three-function combination valve has all of these EXCEPT a:

• Proportioning valve.
• Metering valve.
• Solenoid valve.
• Brake failure light switch. Answer- Answer C is correct. The solenoid valve is not

part of the combination valve.The front brakes of a vehicle with a front disc rear drum brake system skid when the brakes are first applied. Which of these is causing this skid condition?

• Proportioning valve.
• Metering valve.
• Pressure differential switch. 3 / 4

• Contaminated brake fluid. Answer- Answer B is correct. The metering valve delays

hydraulic pressure to the front brakes and gives the system a chance to overcome rear drum spring tension. The metering valve helps achieve balanced braking.A vehicle's brake lights are completely inoperative. Technician A says the brake light switch may be stuck closed. Technician B says the circuit may have shorted and blown a fuse. Who is correct? Answer- TECH B is correct. If both brake lights are out, start troubleshooting with a quick check of the circuits fuse.An integral drum parking brake system is being discussed. Technician A says a binding cable will prevent parking brake application. Technician B says this system contains a brake strut. Who is correct? Answer- Both technicians are correct.Technician A says an outside micrometer is the preferred tool for measuring rotor lateral runout. Technician B says a dial indicator is the preferred tool used for measuring rotor thickness. Who is correct? Answer- Neither Technician A or B is correct. A micrometer is used for measuring rotor thickness. A dial indicator is used to measure lateral runout.A technician is measuring the inside diameter of a brake drum with a brake drum micrometer. The technician should use which of the following measurements

• The smallest measurement.
• A brake drum tool is not used.
• The average of all the measurements.
• The largest measurement. Answer- Answer D is correct. The largest measurement

is used.Two technicians are discussing brake backing plates. Technician A says if a ridge has formed on the pads where the shoes rest they may be filed to restore a smooth finish.Technician B says to apply bearing grease to reduce brake squeak. Who is correct?Answer- TECH A is correct. The ridge often formed by the movement of the brake shoe may be filed smooth.A vehicle has a low brake pedal. Technician A says an improperly adjusted brake pedal could be the cause. Technician B says overheated brake fluid could cause this condition. Who is correct? Answer- Both Technicians are correct. An under adjusted brake pedal will cause a low brake pedal. Excessive heat damages brake fluid resulting in a spongy or low brake pedal.A technician is lubricating rubber brake components while performing a brake job.Technician A says to use a high temperature silicon based lubricant. Technician B says to use a good petroleum based lubricant. Who is correct? Answer- TECH A is correct.Use high temperature silicon based lubricant that does not contain petroleum.

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