Which statement is true about CV joints?

Which statement is true about CV joints?

• A. Both A and B
• B. A only
• C. B only
• D. Neither

Answer: (A)

CV joints are designed to transfer torque from the drive shaft to the wheels while allowing the axle to bend as the suspension moves and the wheels steer. They achieve this by having inner and outer joints on a shaft, which lets the steering and suspension angles change without losing a smooth transfer of power. A key real-world detail is that CV joints are sealed with a flexible boot filled with grease. This boot keeps the lubricant in and dirt and water out, which protects the joint from premature wear. When the boot cracks or leaks, the grease can escape and contaminants can enter, quickly leading to joint failure. If both statements describe true aspects of CV joints—one about how they handle changing angles to transmit torque, and the other about being protected by a grease-filled boot—then the combined description accurately reflects how CV joints work. That’s why the option indicating both statements are true is the best choice.

CV joints are designed to transfer torque from the drive shaft to the wheels while allowing the axle to bend as the suspension moves and the wheels steer. They achieve this by having inner and outer joints on a shaft, which lets the steering and suspension angles change without losing a smooth transfer of power.

A key real-world detail is that CV joints are sealed with a flexible boot filled with grease. This boot keeps the lubricant in and dirt and water out, which protects the joint from premature wear. When the boot cracks or leaks, the grease can escape and contaminants can enter, quickly leading to joint failure.

If both statements describe true aspects of CV joints—one about how they handle changing angles to transmit torque, and the other about being protected by a grease-filled boot—then the combined description accurately reflects how CV joints work. That’s why the option indicating both statements are true is the best choice.