T4 ASE BRAKE EXAM QUESTIONS AND
ANSWERS 100% PASS 2026 UPDATE.
The three ports on a air governor are - ANS Reservoir unloader exhaust
Air tank pressure valve on the the tanks will open at - ANS 150 psi
Air is leaking from the quick release valve mounted on the front axle during a service brake
application - ANS Quick release
A truck with abs needs the abs wheel speed sensor reluctor replaced how many teeth should
the new abs wheel speed sensor have - ANS 100 teeth
What is the the minimum brake shoe line thickness on a s-cam drum brakes - ANS .250
inches
Tech a says that a wheel speed sensor sends a D.C. Voltage signals to the ecu tech b b says that
the frequency of ac voltage cycles is directly proportional to wheel speed who is correct -
ANS Tech b
The maximum acceptable air leak on a straight truck (parking brakes applied) is - ANS 2 psi in
one minute
The spring brakes on a truck should automatically apply when air pressure to the push-pull valve
on the dash drops to below - ANS Between 20 and 40 so 30
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A broken air compressor unloaded valve spring will most likely cause - ANS Slow air buildup
time
A compressor has a broken connecting rod the air compressor crankshaft is blue which of the
following could have caused the air compressor to fail - ANS Restricted oil supply
Which of the following would be the most normal end play spec for a set of tapered roller front
wheel bearing - ANS .001 to .005 inches
When constant pressure is held on the service brake pedal on a truck with hydraulic brakes it
slowly falls to the floor there are no extrnal brake fluid leaks which of the following could be the
cause - ANS The fluid is by-passing inside the master cylinder
An air disc brake is being measured for thickness variation tech a say two dial indicators can be
used tech b says an outside micrometer can be used who is correct - ANS Both
Which of the following is the correct way to test the inversion valve - ANS Drain the primary
tank and watch the action of the parking brakes
What should be used to clean abs electric connectors - ANS Alcohol
The fitting on a truck equipped with air brakes must be stamped with - ANS Dot
The air lines used on a truck equipped with air brakes must be stamped with - ANS Dot
What is a duplex gauge - ANS An example of a duplex gauge is the dual air pressure gauge
found on many trucks. It is one gauge with two needles
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS 100% PASS 2026 UPDATE.
The three ports on a air governor are - ANS Reservoir unloader exhaust
Air tank pressure valve on the the tanks will open at - ANS 150 psi
Air is leaking from the quick release valve mounted on the front axle during a service brake
application - ANS Quick release
A truck with abs needs the abs wheel speed sensor reluctor replaced how many teeth should
the new abs wheel speed sensor have - ANS 100 teeth
What is the the minimum brake shoe line thickness on a s-cam drum brakes - ANS .250
inches
Tech a says that a wheel speed sensor sends a D.C. Voltage signals to the ecu tech b b says that
the frequency of ac voltage cycles is directly proportional to wheel speed who is correct -
ANS Tech b
The maximum acceptable air leak on a straight truck (parking brakes applied) is - ANS 2 psi in
one minute
The spring brakes on a truck should automatically apply when air pressure to the push-pull valve
on the dash drops to below - ANS Between 20 and 40 so 30
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A broken air compressor unloaded valve spring will most likely cause - ANS Slow air buildup
time
A compressor has a broken connecting rod the air compressor crankshaft is blue which of the
following could have caused the air compressor to fail - ANS Restricted oil supply
Which of the following would be the most normal end play spec for a set of tapered roller front
wheel bearing - ANS .001 to .005 inches
When constant pressure is held on the service brake pedal on a truck with hydraulic brakes it
slowly falls to the floor there are no extrnal brake fluid leaks which of the following could be the
cause - ANS The fluid is by-passing inside the master cylinder
An air disc brake is being measured for thickness variation tech a say two dial indicators can be
used tech b says an outside micrometer can be used who is correct - ANS Both
Which of the following is the correct way to test the inversion valve - ANS Drain the primary
tank and watch the action of the parking brakes
What should be used to clean abs electric connectors - ANS Alcohol
The fitting on a truck equipped with air brakes must be stamped with - ANS Dot
The air lines used on a truck equipped with air brakes must be stamped with - ANS Dot
What is a duplex gauge - ANS An example of a duplex gauge is the dual air pressure gauge
found on many trucks. It is one gauge with two needles
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
