Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Dynamic imbalance causes:

Dynamic imbalance happens when mass is not distributed evenly around the wheel in more than one plane. As the wheel spins, the uneven mass creates centrifugal forces that don’t stay aligned with the axle, producing a sideways force on the tire. That sideways force makes the tire–wheel assembly move side to side relative to the car, which is the observable symptom. In contrast, static imbalance tends to cause vertical bounce because the heavy spot drops under gravity as the wheel rotates. A wheel wobble usually points to a bent wheel or loose components, and tire grip loss is a traction issue, not an imbalance symptom.

Dynamic imbalance happens when mass is not distributed evenly around the wheel in more than one plane. As the wheel spins, the uneven mass creates centrifugal forces that don’t stay aligned with the axle, producing a sideways force on the tire. That sideways force makes the tire–wheel assembly move side to side relative to the car, which is the observable symptom. In contrast, static imbalance tends to cause vertical bounce because the heavy spot drops under gravity as the wheel rotates. A wheel wobble usually points to a bent wheel or loose components, and tire grip loss is a traction issue, not an imbalance symptom.