T4 Ase Brake 2026 Exam
Questions with 100% Correct
Answers | Latest Update
The three ports on a air governor are - ANSWER ✔✔Reservoir
unloader exhaust
Air tank pressure valve on the the tanks will open at - ANSWER
✔✔150 psi
Air is leaking from the quick release valve mounted on the front axle
during a service brake application - ANSWER ✔✔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 -
ANSWER ✔✔100 teeth
What is the the minimum brake shoe line thickness on a s-cam drum
brakes - ANSWER ✔✔.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 - ANSWER ✔✔Tech b
The maximum acceptable air leak on a straight truck (parking brakes
applied) is - ANSWER ✔✔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 -
ANSWER ✔✔Between 20 and 40 so 30
A broken air compressor unloaded valve spring will most likely cause -
ANSWER ✔✔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 - ANSWER ✔✔Restricted oil supply
, Which of the following would be the most normal end play spec for a set
of tapered roller front wheel bearing - ANSWER ✔✔.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 - ANSWER
✔✔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 - ANSWER ✔✔Both
Which of the following is the correct way to test the inversion valve -
ANSWER ✔✔Drain the primary tank and watch the action of the
parking brakes
What should be used to clean abs electric connectors - ANSWER
✔✔Alcohol
The fitting on a truck equipped with air brakes must be stamped with -
ANSWER ✔✔Dot
The air lines used on a truck equipped with air brakes must be stamped
with - ANSWER ✔✔Dot
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct
Answers | Latest Update
The three ports on a air governor are - ANSWER ✔✔Reservoir
unloader exhaust
Air tank pressure valve on the the tanks will open at - ANSWER
✔✔150 psi
Air is leaking from the quick release valve mounted on the front axle
during a service brake application - ANSWER ✔✔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 -
ANSWER ✔✔100 teeth
What is the the minimum brake shoe line thickness on a s-cam drum
brakes - ANSWER ✔✔.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 - ANSWER ✔✔Tech b
The maximum acceptable air leak on a straight truck (parking brakes
applied) is - ANSWER ✔✔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 -
ANSWER ✔✔Between 20 and 40 so 30
A broken air compressor unloaded valve spring will most likely cause -
ANSWER ✔✔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 - ANSWER ✔✔Restricted oil supply
, Which of the following would be the most normal end play spec for a set
of tapered roller front wheel bearing - ANSWER ✔✔.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 - ANSWER
✔✔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 - ANSWER ✔✔Both
Which of the following is the correct way to test the inversion valve -
ANSWER ✔✔Drain the primary tank and watch the action of the
parking brakes
What should be used to clean abs electric connectors - ANSWER
✔✔Alcohol
The fitting on a truck equipped with air brakes must be stamped with -
ANSWER ✔✔Dot
The air lines used on a truck equipped with air brakes must be stamped
with - ANSWER ✔✔Dot
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
