Diesel Tech Brakes ASE Practice Test 2 Practice Questions and Answers
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Course
ASE
Institution
ASE
Diesel Tech Brakes ASE Practice Test 2
Practice Questions and Answers
Technician A says the same electronic control unit (ECU) operates the antilock braking systems (ABS) on
the tractor and the trailer. Technician B says that if replacement tires are a different size from the original
tires, th...
On a tractor-trailer combination with air brakes, the parking brake on the tractor will not release, but the
trailer brakes work correctly. Which of the following is the most likely cause?
A. Shorted brake light switch
B. Stuck parking brake relay valve
C. Stuck service brake relay valve
D. A hand valve slightly stuck on - Ans:✔✔-B. Stuck parking brake relay valve
A technician is testing a hydraulic brake booster. With the engine off, the brake pedal depresses 1.5
inches, then the engine is started and the brake pedal falls another inch. Technician A says this indicates
a faulty master cylinder. Technician B says this indicates a faulty brake booster. Who is correct?
A. A only
B. B only
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