T4 Brakes ASE QUESTIONS AND CORRECT ANSWERS LATEST 2025
Which of the following could cause the brakes on a truck to wear too fast?
A. glazed drums
B. wrong linings installed
C. Low air pressure
D. governor cut out pressure -CORRECT ANSWER-B. wrong linings installed
which of the following could cause one brake on a truck to wear faster than the others?
A. mismatched service brake chambers
B. mismatched parking chambers
C. low air pressure in service tanks
D. governor cut out too low -CORRECT ANSWER-A. mismatched service chambers
what force is used to apply the foundation brake wheel cylinders?
A. hydraulic from the steering reservoir
B. mechanical
C. electrical
D. hydraulic from the master cylinder -CORRECT ANSWER-D.
there's an audible air leak from under the dash when the foot valve is applied. technician A
says the double check valve may be faulty. Tech B says the single check valve may be faulty.
who's correct? -CORRECT ANSWER-Tech A only
on a straight truck equipped with air brake, the secondary tank pressure gauge falls to zero
when the wet tank air is drained. Tech A says the one way check valve is faulty, Tech B says
the foot valve may be faulty. Who's correct? -CORRECT ANSWER-Tech A only. one way check
valve protects secondary tank
, A loose wheel bearing adjustment can cause a faulty wheel speed sensor and a wheel speed
sensor code -CORRECT ANSWER-
Air dryer purges too often. Tech A says the air dryer delivery check Valve may be faulty. Tech
B says a leaking wet tank could be the cause. Who's correct? -CORRECT ANSWER-C. Both
Techs.
The safety valve releases on the air tank. Which is the most likely cause?
A. plugged line from the supply tank to governor.
B. faulty tractor protection valve
C. stuck spitter on the air drier
D. faulty secondary tank -CORRECT ANSWER-A. if the line was plugged, the governor would
not unload the compressor
A truck with hydraulic disc/drum brakes has a high firm pedal with poor stopping. what
could be the cause? -CORRECT ANSWER-The brake linings are glazed! Glazed brake linings
will allow the pedal to feel high and firm with no stopping power
Air builds on a truck in 1.5 minutes. The specs. manual says it should take 3.5 min. Tech A
says the air tanks could have water build up. Tech B says the air tanks could have oil built up.
Whos correct? -CORRECT ANSWER-C. Both technicians. Any Build up reduces volume for
stored air
Brake fluid is leaking from the rear of a master cylinder on a hydro boost brake system. What
is the likely cause? -CORRECT ANSWER-Primary seal leaking.
Air pressure build up time on a gear driven compressor is greater than specifications. What
is the cause?
A. a slipping drive
B. a leaking service relay
Which of the following could cause the brakes on a truck to wear too fast?
A. glazed drums
B. wrong linings installed
C. Low air pressure
D. governor cut out pressure -CORRECT ANSWER-B. wrong linings installed
which of the following could cause one brake on a truck to wear faster than the others?
A. mismatched service brake chambers
B. mismatched parking chambers
C. low air pressure in service tanks
D. governor cut out too low -CORRECT ANSWER-A. mismatched service chambers
what force is used to apply the foundation brake wheel cylinders?
A. hydraulic from the steering reservoir
B. mechanical
C. electrical
D. hydraulic from the master cylinder -CORRECT ANSWER-D.
there's an audible air leak from under the dash when the foot valve is applied. technician A
says the double check valve may be faulty. Tech B says the single check valve may be faulty.
who's correct? -CORRECT ANSWER-Tech A only
on a straight truck equipped with air brake, the secondary tank pressure gauge falls to zero
when the wet tank air is drained. Tech A says the one way check valve is faulty, Tech B says
the foot valve may be faulty. Who's correct? -CORRECT ANSWER-Tech A only. one way check
valve protects secondary tank
, A loose wheel bearing adjustment can cause a faulty wheel speed sensor and a wheel speed
sensor code -CORRECT ANSWER-
Air dryer purges too often. Tech A says the air dryer delivery check Valve may be faulty. Tech
B says a leaking wet tank could be the cause. Who's correct? -CORRECT ANSWER-C. Both
Techs.
The safety valve releases on the air tank. Which is the most likely cause?
A. plugged line from the supply tank to governor.
B. faulty tractor protection valve
C. stuck spitter on the air drier
D. faulty secondary tank -CORRECT ANSWER-A. if the line was plugged, the governor would
not unload the compressor
A truck with hydraulic disc/drum brakes has a high firm pedal with poor stopping. what
could be the cause? -CORRECT ANSWER-The brake linings are glazed! Glazed brake linings
will allow the pedal to feel high and firm with no stopping power
Air builds on a truck in 1.5 minutes. The specs. manual says it should take 3.5 min. Tech A
says the air tanks could have water build up. Tech B says the air tanks could have oil built up.
Whos correct? -CORRECT ANSWER-C. Both technicians. Any Build up reduces volume for
stored air
Brake fluid is leaking from the rear of a master cylinder on a hydro boost brake system. What
is the likely cause? -CORRECT ANSWER-Primary seal leaking.
Air pressure build up time on a gear driven compressor is greater than specifications. What
is the cause?
A. a slipping drive
B. a leaking service relay
