Red Seal Truck and Transport Mechanic Practice Exam

Identify one common sign of a failing starter motor.

1. The engine does not turn over when the ignition key is turned

2. The vehicle shakes while driving

3. The headlights flicker while the engine runs

4. The tires lose traction on wet surfaces

The correct answer is: The engine does not turn over when the ignition key is turned

A common sign of a failing starter motor is that the engine does not turn over when the ignition key is turned. This occurs when the starter motor fails to engage due to issues such as worn-out components, electrical failures, or insufficient power supply from the battery. When the ignition key is turned, the electrical signal sent to the starter motor will not result in movement if the motor is malfunctioning, leading to silence or a clicking sound instead of the normal cranking noise that indicates the engine is attempting to start. The other options relate to different systems or components of the vehicle. For instance, shaking while driving could indicate issues with the suspension, alignment, or tires, and is not directly related to the starter motor's operation. Flickering headlights while the engine runs may suggest an issue with the electrical system, such as a failing alternator, but again is not tied to the starter motor. Tires losing traction on wet surfaces pertains to tire condition and vehicle handling, and does not provide any clues about starter functionality.