ASE Brakes A5 Test ( Exam 2 )
The brakes are dragging on a vehicle. this could be cause by
a. overfilled master cylinder reservoir
b. low vacuum to the boost
c. bypassing master cylinder
d. quick take-up valve stuck open - -A : overfilled master cylinder reservoir
why : an overfilled master cylinder reservoir cylinder would not allow for fluid
expansion. this would cause the brakes to self apply as the fluid expanded as
result in brake drag
-The brake pads are worn at an angle on a vehicle with a sliding brake
caliper system. which of the following is most likely the cause?
a. worn caliper piston
b. worn caliper bushings
c. leaking caliper seal
d. leaking caliper boot - -B : worn caliper bushings
why : worn bushings can cause the caliper to cock during operation. this
could cause the pads to wear at an angle
-A diagnostic trouble code is set for an open wheel speed sensor on the left
front sensor. The technician measures the resistance at the sensor and finds
it to be within specification. Which of the following is the most likely cause
for the wheel speed sensor code?
a. faulty ABS computer
b. open fuse
c. open wiring from the computer to the wheel speed sensor
d. shorted left front ABS modulator valve - -C : open wiring from the
computer to the wheel speed sensor
why : an open in the wiring from the sensor to the computer would cause a
diagnostic trouble code to be set and the sensor to have the correct
resistance
-The brake warning lamp pictured above (pg. 56) stays on any time the
ignition switch is on. Tech A says this could be caused by a poor ground at
the parking brake switch. Tech B says this could be caused by a poor ground
at the brake warning lamp switch. Who is correct?
a. A only
, b. B only
c. A & B
d. neither A or B - -D : neither A or B
why : neither technician is correct. there is a ground present at all times to
cause the light to be on all the time
-Which of the following is true concerning the above caliper? ( pg. 57 )
a. this caliper incorporates the parking brake
b. this caliper can only be used on the front
c. this caliper can only be used with Type 5 brake fluid
d. this caliper must be replaced at each brake pad replacement - -A : this
caliper incorporates the parking brake
why : ^^^
-Tech A says a double flare line should be replaced with an ISO flare line.
Tech B says an ISO flare line should be replaced with a double flare line. Who
is correct?
a. A only
b. B only
c. A & B
d. neither - -D : neither
why : neither technician is correct
-While testing the system shown above ( pg. 58 ), the technician finds there
is no assist from the booster after the engine is shut off. Which of the
following is the most likely correct?
a. a faulty back-up EH pump
b. a faulty accumulator
c. a bypassing master cylinder
d. a bypassing brake booster - -A : a faulty back-up EH pump
why : the accumulator could be faulty and not storing pressure
-A customer is concerned that under heavy acceleration on dry pavement
the traction control light comes on and the throttle momentarily becomes
unresponsive. Which of the following is the most likely cause?
a. a tire has lost traction
b. the accelerator pedal position (APP) sensor is faulty
c. the throttle position sensor (TPS) is faulty
The brakes are dragging on a vehicle. this could be cause by
a. overfilled master cylinder reservoir
b. low vacuum to the boost
c. bypassing master cylinder
d. quick take-up valve stuck open - -A : overfilled master cylinder reservoir
why : an overfilled master cylinder reservoir cylinder would not allow for fluid
expansion. this would cause the brakes to self apply as the fluid expanded as
result in brake drag
-The brake pads are worn at an angle on a vehicle with a sliding brake
caliper system. which of the following is most likely the cause?
a. worn caliper piston
b. worn caliper bushings
c. leaking caliper seal
d. leaking caliper boot - -B : worn caliper bushings
why : worn bushings can cause the caliper to cock during operation. this
could cause the pads to wear at an angle
-A diagnostic trouble code is set for an open wheel speed sensor on the left
front sensor. The technician measures the resistance at the sensor and finds
it to be within specification. Which of the following is the most likely cause
for the wheel speed sensor code?
a. faulty ABS computer
b. open fuse
c. open wiring from the computer to the wheel speed sensor
d. shorted left front ABS modulator valve - -C : open wiring from the
computer to the wheel speed sensor
why : an open in the wiring from the sensor to the computer would cause a
diagnostic trouble code to be set and the sensor to have the correct
resistance
-The brake warning lamp pictured above (pg. 56) stays on any time the
ignition switch is on. Tech A says this could be caused by a poor ground at
the parking brake switch. Tech B says this could be caused by a poor ground
at the brake warning lamp switch. Who is correct?
a. A only
, b. B only
c. A & B
d. neither A or B - -D : neither A or B
why : neither technician is correct. there is a ground present at all times to
cause the light to be on all the time
-Which of the following is true concerning the above caliper? ( pg. 57 )
a. this caliper incorporates the parking brake
b. this caliper can only be used on the front
c. this caliper can only be used with Type 5 brake fluid
d. this caliper must be replaced at each brake pad replacement - -A : this
caliper incorporates the parking brake
why : ^^^
-Tech A says a double flare line should be replaced with an ISO flare line.
Tech B says an ISO flare line should be replaced with a double flare line. Who
is correct?
a. A only
b. B only
c. A & B
d. neither - -D : neither
why : neither technician is correct
-While testing the system shown above ( pg. 58 ), the technician finds there
is no assist from the booster after the engine is shut off. Which of the
following is the most likely correct?
a. a faulty back-up EH pump
b. a faulty accumulator
c. a bypassing master cylinder
d. a bypassing brake booster - -A : a faulty back-up EH pump
why : the accumulator could be faulty and not storing pressure
-A customer is concerned that under heavy acceleration on dry pavement
the traction control light comes on and the throttle momentarily becomes
unresponsive. Which of the following is the most likely cause?
a. a tire has lost traction
b. the accelerator pedal position (APP) sensor is faulty
c. the throttle position sensor (TPS) is faulty
