ASE A5 - Brakes Test Questions and Correct
Answers Updated
Question 1
Brake fluid leaking from a cracked brake line causes the brake light on the dashboard
to come on in response to the loss of hydraulic pressure. Which of the following
valves in the hydraulic system switched on the light?
A. metering valve
B. pressure differential valve
C. proportioning valve
D. residual check valve
Correct Answer
The correct answer is B. The pressure differential valve and warning switch alerts the
driver of a pressure loss in one of the hydraulic circuits. The residual check valve is
often used in the master cylinder outlet port of a drum brake systems in order to
maintain a slight pressure in the brake lines and wheel cylinders, which keep wheel
cylinder piston tight against their bores. the metering valve delays front disc brake
operation until the rear brakes shoes overcome the return spring tension. The
proportioning valve is used to control rear brake pressers, particularly during hard
stops.
Question 2
All of the following disc brake rotor measurements can be performed using a
micrometer EXCEPT:
A. Parallelism
B. Thickness
C. Runout
D. Taper
Correct Answer
The correct answer is C. lateral runout is measured using a dial indicator. All of the
other measurements can be made using a micrometer.
Page 1 of 38
,Question 3
A wheel cylinder has been disassembled and corrosion and light scoring have been
found in the bore. Technician A says the bore can be refinished using a small hone
lubricated with cutting oil. Technician B says oversize piston and cup seals can be
installed if the hone removes too much material. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is D, neither technician is right. use only fresh clean brake fluid
to lubricate the honing stones; never use petroleum=based cutting oil. After the
cylinder has been hones, inspect it for excessive piston clearance. To check the
maximum clearance, place a 0.003-in feeler shim lengthwise in the cylinder bore. if
the piston can be inserted with the shim in place, the cylinder is oversize and cannot
be rebuilt.
Question 4
All of the following statements about leading-trailing type drum brakes are true
EXCEPT:
A. The leading shoe does most of the forward braking.
B. Both brake shoes are held against a fixed anchor on the back plating.
C. They are self-energizing.
D. The trailing shoe does most of the reverse braking.
Correct Answer
The correct answer is C. The leading-trailing drum brake design is not self-
energizing. This is due to the fixed anchor on the backing plate, which prevents the
shoe from transferring their force to one another.
Page 2 of 38
,Question 5
Technician A says that DOT 5 brake fluid had a lower boiling point than DOT 4.
Technician B says that DOT 4 brake fluid is silicone-based and should never be used in
an ABS system. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is D, neither technician is right. It is DOT 4 brake fluid that has a
lower boiling point, and DOT 5 that is silicone-based and should not be used in any
ABS system.
Question 6
Technician A says that DTCs can be accessed from any ABS system using flash
diagnostics. Technician B says that ABS system tests can be performed with a bi-
directional scan tool. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is B. Only a few ABS systems (primarily RWAL) offer flash code
diagnostics for retrieving stored fault codes. A bi-directional scan tool can be used
to perform tests on ABS system components. A technician can activate solenoids
and valves while observing the change in that circuit.
Page 3 of 38
, Question 7
A driver complains that the ABS system on his car engages every time he applies the
brakes on a cobblestone roadway he uses going back-and-forth to work. This
condition means that:
A. The system is operating normally.
B. The wheels are traveling at different speeds.
C. A wheel speed sensor(s) is faulty.
D. both A and B
Correct Answer
The correct answer is D. When a vehicle with ABS is braked on abnormally irregular
road surfaces, like a cobblestone road, the wheels decelerate at different speeds.
Because the signals coming from the wheel speed sensors under this condition are
not in sync with each other, the ABS control unit interprets this as impending wheel
lockup and responds by engaging the system.
Question 8
Which of the following is the MOST cost-efficient method of correcting excessive
lateral runout on a disc brake rotor?
A. Indexing
B. Shimming
C. Machining
D. Replacement
Correct Answer
The correct answer is A. Indexing involves moving the rotor position on the hub and
rechecking the runout with a dial indicator. The number of wheel studs determine
the number of possible position to correct runout. This method requires little extra
labor, no parts expense and no machining labor or expense. Resurfacing the rotor
unnecessarily removes material and makes the rotor thinner, lessening its ability to
absorb and dissipate heat and shortening the rotor's usable lifespan.
Page 4 of 38
Answers Updated
Question 1
Brake fluid leaking from a cracked brake line causes the brake light on the dashboard
to come on in response to the loss of hydraulic pressure. Which of the following
valves in the hydraulic system switched on the light?
A. metering valve
B. pressure differential valve
C. proportioning valve
D. residual check valve
Correct Answer
The correct answer is B. The pressure differential valve and warning switch alerts the
driver of a pressure loss in one of the hydraulic circuits. The residual check valve is
often used in the master cylinder outlet port of a drum brake systems in order to
maintain a slight pressure in the brake lines and wheel cylinders, which keep wheel
cylinder piston tight against their bores. the metering valve delays front disc brake
operation until the rear brakes shoes overcome the return spring tension. The
proportioning valve is used to control rear brake pressers, particularly during hard
stops.
Question 2
All of the following disc brake rotor measurements can be performed using a
micrometer EXCEPT:
A. Parallelism
B. Thickness
C. Runout
D. Taper
Correct Answer
The correct answer is C. lateral runout is measured using a dial indicator. All of the
other measurements can be made using a micrometer.
Page 1 of 38
,Question 3
A wheel cylinder has been disassembled and corrosion and light scoring have been
found in the bore. Technician A says the bore can be refinished using a small hone
lubricated with cutting oil. Technician B says oversize piston and cup seals can be
installed if the hone removes too much material. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is D, neither technician is right. use only fresh clean brake fluid
to lubricate the honing stones; never use petroleum=based cutting oil. After the
cylinder has been hones, inspect it for excessive piston clearance. To check the
maximum clearance, place a 0.003-in feeler shim lengthwise in the cylinder bore. if
the piston can be inserted with the shim in place, the cylinder is oversize and cannot
be rebuilt.
Question 4
All of the following statements about leading-trailing type drum brakes are true
EXCEPT:
A. The leading shoe does most of the forward braking.
B. Both brake shoes are held against a fixed anchor on the back plating.
C. They are self-energizing.
D. The trailing shoe does most of the reverse braking.
Correct Answer
The correct answer is C. The leading-trailing drum brake design is not self-
energizing. This is due to the fixed anchor on the backing plate, which prevents the
shoe from transferring their force to one another.
Page 2 of 38
,Question 5
Technician A says that DOT 5 brake fluid had a lower boiling point than DOT 4.
Technician B says that DOT 4 brake fluid is silicone-based and should never be used in
an ABS system. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is D, neither technician is right. It is DOT 4 brake fluid that has a
lower boiling point, and DOT 5 that is silicone-based and should not be used in any
ABS system.
Question 6
Technician A says that DTCs can be accessed from any ABS system using flash
diagnostics. Technician B says that ABS system tests can be performed with a bi-
directional scan tool. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B
Correct Answer
The correct answer is B. Only a few ABS systems (primarily RWAL) offer flash code
diagnostics for retrieving stored fault codes. A bi-directional scan tool can be used
to perform tests on ABS system components. A technician can activate solenoids
and valves while observing the change in that circuit.
Page 3 of 38
, Question 7
A driver complains that the ABS system on his car engages every time he applies the
brakes on a cobblestone roadway he uses going back-and-forth to work. This
condition means that:
A. The system is operating normally.
B. The wheels are traveling at different speeds.
C. A wheel speed sensor(s) is faulty.
D. both A and B
Correct Answer
The correct answer is D. When a vehicle with ABS is braked on abnormally irregular
road surfaces, like a cobblestone road, the wheels decelerate at different speeds.
Because the signals coming from the wheel speed sensors under this condition are
not in sync with each other, the ABS control unit interprets this as impending wheel
lockup and responds by engaging the system.
Question 8
Which of the following is the MOST cost-efficient method of correcting excessive
lateral runout on a disc brake rotor?
A. Indexing
B. Shimming
C. Machining
D. Replacement
Correct Answer
The correct answer is A. Indexing involves moving the rotor position on the hub and
rechecking the runout with a dial indicator. The number of wheel studs determine
the number of possible position to correct runout. This method requires little extra
labor, no parts expense and no machining labor or expense. Resurfacing the rotor
unnecessarily removes material and makes the rotor thinner, lessening its ability to
absorb and dissipate heat and shortening the rotor's usable lifespan.
Page 4 of 38
