ASE A5 Brakes practice test
Built for the ASE A5 Brakes certification test: hydraulic, power assist and parking brake systems, drum brakes, disc brakes and electronic brake control, with Technician A and Technician B questions. Every question is original, with an explanation of why the right answer is right.
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What the full set includes
- 90 original four-option questions, with an explanation for every answer
- 2 timed practice exams of 45 questions in 75 minutes, the length of the real scored test
- Each exam weighted like the real one: 19 hydraulic, power assist and parking brake, 5 drum, 11 disc, 10 electronic brake control
- Study mode (instant feedback) and exam mode (timer, graded at the end)
- Drill by topic or only your weak spots; weak spots tracked across every attempt
Topics covered
- Hydraulic, power assist and parking brake
- Drum brakes
- Disc brakes
- Electronic brake control
Sample questions
Question 1
With the engine running, steady pressure on the brake pedal makes it sink slowly toward the floor. The fluid level has not dropped and no leak can be found. Which is the most likely cause?
- Fluid bypassing the master cylinder piston seals
- A metering valve stuck closed in the front brake circuit
- Rear shoes out of adjustment on both sides
- Air trapped in a front brake line and the rear wheel cylinders
Show the answer
A. Fluid bypassing the master cylinder piston seals. A pedal that sinks under steady pressure with no fluid loss points to an internal leak: fluid slips past the piston seals inside the master cylinder. Air makes the pedal spongy rather than sinking, and a metering valve or shoe adjustment would not cause a slow, continuous drop.
Question 2
A vehicle has a low, firm brake pedal that rises when pumped. It is not spongy. Which is the most likely cause?
- Glazed front pads with hardened friction surfaces
- A stuck proportioning valve in the rear circuit
- Rear drum shoes out of adjustment
- A failing vacuum booster with low assist
Show the answer
C. Rear drum shoes out of adjustment. Excess shoe clearance uses up pedal travel before the brakes apply, and pumping takes up the gap. The pedal stays firm because the fluid has no air in it.
Question 3
A rotor is being measured for lateral runout. Which tool is used?
- A feeler gauge
- A straightedge
- A dial indicator
- An outside micrometer
Show the answer
C. A dial indicator. A dial indicator mounted against the rotor face shows side to side wobble as it turns. A micrometer measures thickness, which is a different check.
Not affiliated with or endorsed by the National Institute for Automotive Service Excellence (ASE). ASE is a trademark of its owner. The questions here are original practice material and are not the official test or the official ASE practice tests.