©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Heavy Duty Truck Systems - Chapter 30
ABS & EBS. Exam Questions And Answers
Updated 2024/2025
When does an ATC light illuminate? - answer✔whenever a spinout condition occurs and
momentarily when ignition switch is turned on
What type of tractor ABS is required to support most antirollover and directional stability
control electronics? - answer✔6S/6M
Which of the following provides the most critical input signal to the ABS module? -
answer✔wheel speed sensor
Which of the following is the control component in an ABS modulator valve? -
answer✔solenoid or motor
Which of the following ABS channel configurations is required in a truck equipped with stability
control electronics (SCE)? - answer✔6S/6M
What is the maximum modulation speed of a typical air brake ABS? - answer✔7 times per
second
Technician A says that in a true EBS, the brake pedal does no more than produce an electrical
signal to the EBS control module. Technician B says that current FMVSS 121 legislation requires
that when EBS is used on North American highways, it is in addition to pneumatic controls. Who
is correct? - answer✔both A and B
Which of the following is the main output device on a truck ABS? - answer✔modulator
assembly
Which of the following is likely to occur if an ABS ceases to function? - answer✔ABS shuts down
and a driver warning light comes on.
1|Page
ALL RIGHTS RESERVED.
Heavy Duty Truck Systems - Chapter 30
ABS & EBS. Exam Questions And Answers
Updated 2024/2025
When does an ATC light illuminate? - answer✔whenever a spinout condition occurs and
momentarily when ignition switch is turned on
What type of tractor ABS is required to support most antirollover and directional stability
control electronics? - answer✔6S/6M
Which of the following provides the most critical input signal to the ABS module? -
answer✔wheel speed sensor
Which of the following is the control component in an ABS modulator valve? -
answer✔solenoid or motor
Which of the following ABS channel configurations is required in a truck equipped with stability
control electronics (SCE)? - answer✔6S/6M
What is the maximum modulation speed of a typical air brake ABS? - answer✔7 times per
second
Technician A says that in a true EBS, the brake pedal does no more than produce an electrical
signal to the EBS control module. Technician B says that current FMVSS 121 legislation requires
that when EBS is used on North American highways, it is in addition to pneumatic controls. Who
is correct? - answer✔both A and B
Which of the following is the main output device on a truck ABS? - answer✔modulator
assembly
Which of the following is likely to occur if an ABS ceases to function? - answer✔ABS shuts down
and a driver warning light comes on.
1|Page
