Which of the following tests is used to help locate worn or defective suspension components?

The dry park test is utilized to help identify worn or defective suspension components as it allows a technician to evaluate the vehicle's suspension system while the vehicle is stationary. During this test, the technician inspects for symptoms such as unusual tire wear, excessive play in the steering components, abnormal noises, and any visible wear on the suspension parts when the vehicle is not moving. This controlled environment aids in pinpointing issues such as worn bushings, ball joints, and shocks since the suspension system can be easily manipulated without the influence of road conditions.

In contrast, the other tests serve different purposes: the frontal impact test focuses on evaluating crash safety; the offset test assesses the vehicle's safety in partial frontal collisions; and the rollover test examines a vehicle's potential to roll over in various scenarios. None of these tests are specifically designed to locate worn or defective suspension components, as they assess broader safety and crashworthiness aspects rather than specific suspension performance.