2023 Edition

ASE A5 Practice Test

ASE identifies brakes as an individual service area. The brakes service area involves the components listed below.

  • 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.

Tests.com's ASE A5 Practice Test was written by Dr. John Kershaw, an ASE test prep expert: ASE test question developer; ASE Certified Master Technician; ASE Master Truck Technician; and Auto Industry Technical Instructor.  Dr. Kershaw was among the first to receive ASE certification in 1972. 

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Hydraulic System Diagnosis and Repair

1. A spongy brake pedal may be caused by:
2. 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:
3. 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?
4. A power assist brake booster push rod that is to short will cause which of the following?

Drum Brake Diagnosis and Repair

5. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. The brake pedal is firm when applied. While starting the engine with the brakes applied, the pedal does not go down slightly. Technician A says excessive brake pedal freeplay could be the cause. Technician B says air trapped in the hydraulic system could be the cause. Who is right?
6. Which of the following conditions can cause brake pedal fade?
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7. The rear brake linings are soaked with axle grease but still have a lot of lining left on them. Which is the correct way to service these brakes?
8. 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:

Disc Brake Diagnosis and Repair

9. 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:
10. A spongy brake pedal on a vehicle with 4-wheel disc brakes with a longer than normal travel indicates which of the following?
11. A vehicle with 4-wheel disc brakes has a brake squeal. Technician A says a defective proportioning valve could be the cause. Technician B says disc brake squeal is often caused by movement of the disc brake pad during braking. Who is right?
12. On a car with single piston floating caliper disc brakes, the disc brake pad between the caliper piston and the rotor is badly worn. The other brake pad is slightly worn. Technician A says excessive rotor run out could be the cause. Technician B says insufficient clearance between the pads and caliper slider could be the cause. Who is right?

Power Assist Units Diagnosis and Repair

13. 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?
14. 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?
15. 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?
16. When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________.

Miscellaneous Systems Diagnosis and Repair

17. On a bearing that has been shock loaded, the race (cup) of the bearing can be dented. What is this type of bearing failure called?
18. The component in the Figure is involved what procedure?

19. 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?
20. The front wheel bearings are being adjusted. Technician A says you torque the adjusting nut to a specified torque and back off the nut till it lines up with the hole and install the cotter pin. Technician B says backing off the castle nut will cause the bearing to overheat. Who is right?

Electronic Brake Control Systems: ABS, TCS and ESC

21. 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?
22. 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?
23. 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?
24. 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?

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Written by:
Dr. John Kershaw
ASE Test Prep Expert

ASE Test Question Developer

ASE Certified Master Technician

ASE Master Truck Technician

Auto Industry Technical Instructor

Among first ASE Certified in 1972
Actual ASE A6 Topics

• General Electric/Electronic 
• Battery and Starting Systems
• Charging Systems
• Lighting Systems
• Instrument Cluster/ Driver Info.
• Body Electrical Systems 


Number of Questions on the Actual ASE A Series Tests

A1 – Engine Repair (60)
A2 – Automatic Transmission/Transaxle (60)
A3 – Manual Drive Train & Axles (50)
A4 – Suspension & Steering (50)
A5 – Brakes (55)
A6 – Electrical/Electronic Systems (60)
A7 – Heating & Air Conditioning (60)
A8 – Engine Performance (60)
A9 – Light Vehicle Diesel Engines (60)