ASE BRAKES T4 TEST 1 GUIDE UPDATED
TESTED SOLUTIONS
⫸ 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 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 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? 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? 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 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? 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 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? Answer: The brake linings are
glazed! Glazed brake linings will allow the pedal to feel high and firm
with no stopping power
TESTED SOLUTIONS
⫸ 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 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 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? 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? 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 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? 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 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? Answer: The brake linings are
glazed! Glazed brake linings will allow the pedal to feel high and firm
with no stopping power
