Red Seal Automotive Service Technician Practice Exam

Which of the following is a common driveline component?

1. Battery

2. Starter motor

3. Driveshaft

4. Alternator

The correct answer is: Driveshaft

A common driveline component is the driveshaft, which plays a crucial role in transferring power from the vehicle's engine and transmission to the wheels. The driveshaft is designed to withstand various torque loads and operates in a dynamic environment where rotational speeds can vary significantly. It typically consists of a long tubular structure that connects to universal joints, allowing for the necessary flexibility as the vehicle moves over uneven terrain or when the suspension is in motion. In contrast, other components like the battery, starter motor, and alternator serve different purposes. The battery provides electrical power for starting the engine and powering electrical systems when the engine is off. The starter motor is responsible for turning the engine over to initiate combustion. The alternator generates electrical power while the engine is running and charges the battery. Therefore, while all these components are vital for the vehicle's operation, only the driveshaft is categorized as a driveline component, focused on the drivetrain's function of movement.