ASE identifies brakes as an individual service area. The brakes service area involves these components: Hydraulic system: Components (such as the brake lines and master cylinder) that transfers power from the brake pedals to either disc or drum brakes. Mechanical Foundation System: Components (such as discs and pads or drums and shoes) that creates the friction required to stop the vehicle. Electronic system: Components that notify the driver of a failure in the brake system. In anti-lock brake (ABS) systems, electrical system components work to prevent tire skidding.

ASE A5 Brake Systems Practice Test

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24 Questions

1. The front brake rotors and pads are being replaced on a vehicle equipped with a TCS (traction control system) and electronic stability control system (ESC). Technician A says the yaw rate and deceleration sensor should be recalibrated. Technician B says the new rotors should be indexed to the hub using a dial indicator for the least amount of runout. Who is right?

B onlyA onlyBothNeither

2. The component in the Figure is involved what procedure?

Replacing sealed wheel bearingReplacing the front strutRepacking a front wheel bearingReplacing a ball joint

3. Which of the following conditions can cause brake pedal fade?

Leakage past the master cylinder cupsSeized wheel cylinder pistonBrake drum machined beyond its limitAir in the hydraulic system

4. A wheel speed sensor is being diagnosed using the OEM (original equipment manufacturer) diagnostic scan tool. Technician A says to verify wheel speed sensor operation, compare all four wheel speed sensor outputs to vehicle speed on the data list. Technician B says the wheel's direction of rotation can be verified by looking at the wheel direction on the scan tool data list. Who is right?

BothA onlyB onlyNeither

5. Technician A says a defective wheel or axle bearing can make a growling or rumbling noise. Technician B says a defective wheel displays looseness or excessive play in the steering wheel especially while driving over rough road surfaces. Who is right?

A onlyB onlyBothNeither

6. The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. Technician A says the quick take up valve must be depressed. Technician B says the brakes on this vehicle cannot be bled. Who is right?

B onlyNeitherBothA only

7. With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. Technician A says the cause could be a leaking power brake booster diaphragm. Technician B says the cause could be a stuck closed residual check valve in the hose from the intake manifold to the power brake booster. Who is right?

B onlyBothA onlyNeither

8. Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. Technician B says the test involves checking the level of vacuum supplied by the engine or vacuum pump. Who is right?

A onlyBothB onlyNeither

9. The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). Who is right?

BothNeitherB onlyA only

10. On a car with a drum/disc system, the front brakes lock up on light pedal application. This problem could be caused by a bad:

Metering valvePressure differential switchProportioning valveResidual check valve

11. When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________.

while driving the vehicle slowlywith the engine offwith the engine runningwith the vacuum hoses removed

12. The ABS (antilock brake system) amber light does not go off after the engine is started. Technician A says a parking brake not fully released could be the cause. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. Who is right?

NeitherA onlyBothB only

13. The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. Technician A says the quick take up valve must be depressed. Technician B says the brakes on this vehicle cannot be bled. Who is right?

BothNeitherA onlyB only

14. This question has the word EXCEPT. For this question, look for the choice that could NOT cause the described situation. Read the entire question carefully before choosing your answer. All of these would cause a low brake pedal, EXCEPT:

Brake adjustmentLow brake fluidSeized caliper pistonLoose wheel bearing

15. A power assist brake booster push rod that is to short will cause which of the following?

Brake system to be inoperativeBrake light is illuminatedExcessive brake pedal travelExcessive brake drag

16. With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. Technician A says the cause could be a leaking power brake booster diaphragm. Technician B says the cause could be a stuck closed residual check valve in the hose from the intake manifold to the power brake booster. Who is right?

B onlyBothA onlyNeither

17. This question has the word EXCEPT. For this question, look for the choice that could NOT cause the described situation. Read the entire question carefully before choosing your answer. All of these would cause a low brake pedal, EXCEPT:

Brake adjustmentSeized caliper pistonLoose wheel bearingLow brake fluid

18. A spongy brake pedal on a vehicle with 4-wheel disc brakes with a longer than normal travel indicates which of the following?

Air in the hydraulic systemCaliper piston seizedParking brake out of adjustmentA faulty power booster

19. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. Technician A says the master cylinder pushrod adjustment is incorrect. Technician B says the cause is a faulty residual pressure check valve admitting air. Who is right?

BothNeitherB onlyA only

20. A spongy brake pedal may be caused by:

ABS Diagnostic Trouble Code setFrozen caliper pistonDefective metering valve.Air in hydraulic system

21. When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________.

with the engine runningwith the engine offwhile driving the vehicle slowlywith the vacuum hoses removed

22. This question has the word EXCEPT. For this question, look for the choice that could NOT cause the described situation. Read the entire question carefully before choosing your answer. A vehicle has a very erratic brake pulling concern while applying the brakes. All of the following items could cause this erratic pull EXCEPT:

Four-wheel alignmentSteering gear problemExcessive tire pressureSeized caliper piston on the other side

23. The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). Who is right?

B onlyBothNeitherA only

24. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. Technician A says the master cylinder pushrod adjustment is incorrect. Technician B says the cause is a faulty residual pressure check valve admitting air. Who is right?

NeitherA onlyB onlyBoth