Which statement best explains why jack stands are used with a lifted vehicle?

Which statement best explains why jack stands are used with a lifted vehicle?

• A. To prevent the vehicle from rolling away
• B. To support the vehicle safely and prevent collapse
• C. To check the engine oil level
• D. To unlock the steering column

Answer: (B)

The key idea is safety when a vehicle is raised. Jack stands are used because they provide a stable, weight-bearing support after you lift the car with a jack. A hydraulic jack alone isn’t reliable for long holds—it can fail or settle, letting the vehicle drop. Placing jack stands at proper lift points gives a solid platform that holds the vehicle up safely while you work underneath or inspect components. The other ideas aren’t about maintaining a stable working height or preventing a fall: keeping the vehicle from rolling away is handled by wheel chocks or parking brake, checking engine oil level is done with the car supported differently or on the ground, and unlocking the steering column is unrelated to lifting safety and could be dangerous.

The key idea is safety when a vehicle is raised. Jack stands are used because they provide a stable, weight-bearing support after you lift the car with a jack. A hydraulic jack alone isn’t reliable for long holds—it can fail or settle, letting the vehicle drop. Placing jack stands at proper lift points gives a solid platform that holds the vehicle up safely while you work underneath or inspect components. The other ideas aren’t about maintaining a stable working height or preventing a fall: keeping the vehicle from rolling away is handled by wheel chocks or parking brake, checking engine oil level is done with the car supported differently or on the ground, and unlocking the steering column is unrelated to lifting safety and could be dangerous.