T4 BRAKES ASE TEST BANK 2026 UPDATED
QUESTIONS AND ACCURATE ANSWERS
GRADED A+
⩥ 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
⩥ What is a duplex gauge. Answer: An example of a duplex gauge is the
dual air pressure gauge found on many trucks. It is one gauge with two
needles
⩥ Tech a say the same electronic control unit (Ecu) operates The
antilock braking systems (abs) on the tractor and trailer tech b says that
if replacement tires are of different size from the original tires the wheel
speed sensor are affected what is correct. Answer: Tech b
⩥ Truck with disc brakes has dragging brakes says the calipers may be
sticking tech b says the master cylinder may be passing fluid who is
correct. Answer: Tech a
QUESTIONS AND ACCURATE ANSWERS
GRADED A+
⩥ 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
⩥ What is a duplex gauge. Answer: An example of a duplex gauge is the
dual air pressure gauge found on many trucks. It is one gauge with two
needles
⩥ Tech a say the same electronic control unit (Ecu) operates The
antilock braking systems (abs) on the tractor and trailer tech b says that
if replacement tires are of different size from the original tires the wheel
speed sensor are affected what is correct. Answer: Tech b
⩥ Truck with disc brakes has dragging brakes says the calipers may be
sticking tech b says the master cylinder may be passing fluid who is
correct. Answer: Tech a
