ABS AND ATC

What occurs when the drive or steer tires have stopped rotating when braking?

Select one:

• a.Fishtailing

• b.Oversteer

• c.Wheel slip

• d.Wheel lock-up

What color is the ABS indicator lamp?

• Green

• Amber

• Red

• Blue

When the ABS configuration equips the wheels of only one tandem axle with air suspension, the wheel speed sensors are generally located on the __________.

Select one:

• a.Axle housing

• b.Mounting block

• c.Lead axle

• d.Trailing axle

Which of the following systems is designed to improve traction by minimizing wheel spin?

Select one:

• PLC

• ATF

• ATC

• ABS

If a rollover condition is anticipated, the RSC trailer brake application creates a drag force that cancels out some of the __________.

Select one:

• a.Spring compression

• b.Steering wheel angle

• c.Lateral acceleration force

• d.Engine torque

Technician A says directional stability control systems assist the driver in maintaining a vehicle's intended driving path by controlling wheel spin. Technician B says yaw simply refers to the rotation of a vehicle around its horizontal axis. Who is correct?

Select one:

• Tech A only

• Tech B only

• Neither

• Both

Technician A says collision avoidance systems are vehicle stability control systems that detect objects beside and in front of a vehicle that have the potential to collide with the vehicle. Technician B says that according to the National Highway Transportation Safety Administration (NHTSA), rear-end collisions account for over 30% of all heavy truck crashes. Who is correct?

Select one:

• Tech A

• Tech B

• Both

• Neither

Which of the following contains an internal yaw sensor and should never be moved to a different location on the vehicle?

Select one:

• a.Stability control module

• b.Steering angle sensor

• c.Yaw rate sensor

• d.Front sensors of CAS

Tech A states that a vehicles engine brake or exhaust brake when activated can cause a wheel lock up condition. Tech B states that Driveline retarders in automatic transmissions can cause a wheel lockup condition. Who is correct? Select one:

• Tech A

• Tech B

• Both

• Neither

Tech A states that when testing a truck ABS ECU module, you can just switch the ABS module from another truck. Tech B states that you cannot switch ABS ECU's from one truck to another because todays ECU;s store VIN numbers and configurations. Who is correct? Select one:

• Tech A

• Tech B

• Both

• Neither