T4 Brakes ASE
Study online at https://quizlet.com/_8s7mdz
1. Which of the following could cause the brakes on a B. wrong linings installed
truck to wear too fast?
A. glazed drums
B. wrong linings installed
C. Low air pressure
D. governor cut out pressure
2. which of the following could cause one brake on a A. mismatched service
truck to wear faster than the others? chambers
A. mismatched service brake chambers
B. mismatched parking chambers
C. low air pressure in service tanks
D. governor cut out too low
3. what force is used to apply the foundation brake wheel D.
cylinders?
A. hydraulic from the steering reservoir
B. mechanical
C. electrical
D. hydraulic from the master cylinder
4. there's an audible air leak from under the dash when Tech A only
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?
5. on a straight truck equipped with air brake, the sec- Tech A only. one way check
ondary tank pressure gauge falls to zero when the wet valve protects secondary
tank air is drained. Tech A says the one way check valve tank
is faulty, Tech B says the foot valve may be faulty. Who's
correct?
6.
1/7
, T4 Brakes ASE
Study online at https://quizlet.com/_8s7mdz
A loose wheel bearing adjustment can cause a faulty
wheel speed sensor and a wheel speed sensor code
7. Air dryer purges too often. Tech A says the air dryer de- C. Both Techs.
livery check Valve may be faulty. Tech B says a leaking
wet tank could be the cause. Who's correct?
8. The safety valve releases on the air tank. Which is the A. if the line was plugged,
most likely cause? the governor would not
A. plugged line from the supply tank to governor. unload the compressor
B. faulty tractor protection valve
C. stuck spitter on the air drier
D. faulty secondary tank
9. A truck with hydraulic disc/drum brakes has a high firm The brake linings are
pedal with poor stopping. what could be the cause? glazed! Glazed brake lin-
ings will allow the pedal to
feel high and firm with no
stopping power
10. Air builds on a truck in 1.5 minutes. The specs. manual C. Both technicians. Any
says it should take 3.5 min. Tech A says the air tanks Build up reduces volume
could have water build up. Tech B says the air tanks for stored air
could have oil built up. Whos correct?
11. Brake fluid is leaking from the rear of a master cylin- Primary seal leaking.
der on a hydro boost brake system. What is the likely
cause?
12. Air pressure build up time on a gear driven compressor C. A leaking primary air
is greater than specifications. What is the cause? tank causes extended air
A. a slipping drive build up time
B. a leaking service relay
2/7
Study online at https://quizlet.com/_8s7mdz
1. Which of the following could cause the brakes on a B. wrong linings installed
truck to wear too fast?
A. glazed drums
B. wrong linings installed
C. Low air pressure
D. governor cut out pressure
2. which of the following could cause one brake on a A. mismatched service
truck to wear faster than the others? chambers
A. mismatched service brake chambers
B. mismatched parking chambers
C. low air pressure in service tanks
D. governor cut out too low
3. what force is used to apply the foundation brake wheel D.
cylinders?
A. hydraulic from the steering reservoir
B. mechanical
C. electrical
D. hydraulic from the master cylinder
4. there's an audible air leak from under the dash when Tech A only
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?
5. on a straight truck equipped with air brake, the sec- Tech A only. one way check
ondary tank pressure gauge falls to zero when the wet valve protects secondary
tank air is drained. Tech A says the one way check valve tank
is faulty, Tech B says the foot valve may be faulty. Who's
correct?
6.
1/7
, T4 Brakes ASE
Study online at https://quizlet.com/_8s7mdz
A loose wheel bearing adjustment can cause a faulty
wheel speed sensor and a wheel speed sensor code
7. Air dryer purges too often. Tech A says the air dryer de- C. Both Techs.
livery check Valve may be faulty. Tech B says a leaking
wet tank could be the cause. Who's correct?
8. The safety valve releases on the air tank. Which is the A. if the line was plugged,
most likely cause? the governor would not
A. plugged line from the supply tank to governor. unload the compressor
B. faulty tractor protection valve
C. stuck spitter on the air drier
D. faulty secondary tank
9. A truck with hydraulic disc/drum brakes has a high firm The brake linings are
pedal with poor stopping. what could be the cause? glazed! Glazed brake lin-
ings will allow the pedal to
feel high and firm with no
stopping power
10. Air builds on a truck in 1.5 minutes. The specs. manual C. Both technicians. Any
says it should take 3.5 min. Tech A says the air tanks Build up reduces volume
could have water build up. Tech B says the air tanks for stored air
could have oil built up. Whos correct?
11. Brake fluid is leaking from the rear of a master cylin- Primary seal leaking.
der on a hydro boost brake system. What is the likely
cause?
12. Air pressure build up time on a gear driven compressor C. A leaking primary air
is greater than specifications. What is the cause? tank causes extended air
A. a slipping drive build up time
B. a leaking service relay
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