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