T4 ASE BRAKES (MEDIUM/HEAVY
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS WITH CORRECT
SOLUTIONS
Which type of drum is most common in passenger vehicles?
Choose one answer.
a. Hubless-style drum
b. Rotor-style drum
c. Hub-style drum
d. Rotorless-style drum - ANSWER - a. Hubless-style drum
A(n) __________________ is commonly used to activate drum-type friction brakes on a trailer that its
gross weight exceeds a certain value.
Choose one answer.
a. surge brake
b. electric braking system
c. Both A and B
,d. None of the answers listed - ANSWER - b. electric braking system
Technician A says that as moisture levels increase in brake fluid, the boiling point of the brake fluid
decreases. Technician B says that the result of brake fluid boiling in brake systems is a spongy pedal and
a loss of braking effort at the wheels. Who is correct?
Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B - ANSWER - c. Both Technician A and Technician B
The amount of friction between two moving faces in contact with each other is expressed as a ratio and
is called:
Choose one answer.
a. friction.
b. the coefficient of heat.
c. the coefficient of friction.
d. heat ratio. - ANSWER - b. the coefficient of heat
Technician A says that wheel speed sensors are a highly probable cause of illuminated EBC warning
lamps. Technician B says that using the diagnostic codes can help determine which wheel speed sensor
or sensor circuit is at fault. Who is correct?
, Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B - ANSWER - c. Both Technician A and Technician B
Technician A states that brake drums should only be refinished when they are excessively grooved.
Technician B states that after refinishing a brake drum, it should be remeasured to ensure that it is
under the manufacturer's maximum diameter. Who is correct?
Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither technician A nor Technician B - ANSWER - b. Technician B
Technician A says that it is normal to find a little brake fluid behind the dust boot when you pull the dust
boot from the wheel cylinder during a brake inspection. Technician B says that if there is any brake fluid
behind the dust boot, the wheel cylinder is starting to leak and should be replaced. Who is correct?
Choose one answer.
a. Technician A
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS WITH CORRECT
SOLUTIONS
Which type of drum is most common in passenger vehicles?
Choose one answer.
a. Hubless-style drum
b. Rotor-style drum
c. Hub-style drum
d. Rotorless-style drum - ANSWER - a. Hubless-style drum
A(n) __________________ is commonly used to activate drum-type friction brakes on a trailer that its
gross weight exceeds a certain value.
Choose one answer.
a. surge brake
b. electric braking system
c. Both A and B
,d. None of the answers listed - ANSWER - b. electric braking system
Technician A says that as moisture levels increase in brake fluid, the boiling point of the brake fluid
decreases. Technician B says that the result of brake fluid boiling in brake systems is a spongy pedal and
a loss of braking effort at the wheels. Who is correct?
Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B - ANSWER - c. Both Technician A and Technician B
The amount of friction between two moving faces in contact with each other is expressed as a ratio and
is called:
Choose one answer.
a. friction.
b. the coefficient of heat.
c. the coefficient of friction.
d. heat ratio. - ANSWER - b. the coefficient of heat
Technician A says that wheel speed sensors are a highly probable cause of illuminated EBC warning
lamps. Technician B says that using the diagnostic codes can help determine which wheel speed sensor
or sensor circuit is at fault. Who is correct?
, Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B - ANSWER - c. Both Technician A and Technician B
Technician A states that brake drums should only be refinished when they are excessively grooved.
Technician B states that after refinishing a brake drum, it should be remeasured to ensure that it is
under the manufacturer's maximum diameter. Who is correct?
Choose one answer.
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither technician A nor Technician B - ANSWER - b. Technician B
Technician A says that it is normal to find a little brake fluid behind the dust boot when you pull the dust
boot from the wheel cylinder during a brake inspection. Technician B says that if there is any brake fluid
behind the dust boot, the wheel cylinder is starting to leak and should be replaced. Who is correct?
Choose one answer.
a. Technician A
