Commercial Driver’s License (CDL) Practice Exam 2025 – All-in-One Guide to Master Your CDL Test!

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What is the primary function of a suspension system in a vehicle?

To enhance fuel efficiency

To keep the axles in place

The primary function of a suspension system in a vehicle is to keep the axles in place. This system is crucial for maintaining the relationship between the wheels, axles, and the chassis of the vehicle, ensuring that the wheels remain in contact with the road surface. By doing so, it allows for better handling and stability while driving.

Additionally, the suspension system absorbs shocks from road irregularities, providing a smoother ride for both the driver and passengers. It also supports the weight of the vehicle, allowing for increased load management and vehicle stability when turning or accelerating.

Other options, although they might seem relevant to vehicle performance, do not accurately describe the primary function of the suspension system. For instance, while the suspension may indirectly influence comfort and ride quality, its main role centers around axle stability and positioning.

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To improve engine performance

To control the speed of the vehicle

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