Final answer:
Neither Technician A nor B is correct, as an impact gun should not be used for final tightening of wheel nuts, and a jack alone is not safe for supporting a vehicle during tire and wheel service.
Step-by-step explanation:
The correct answer is option d) Neither A nor B. While using an impact gun can speed up the process of removing and securing wheel nuts, it is generally not recommended for the final tightening step.
Proper torque should be applied to wheel nuts manually with a torque wrench to prevent over-tightening, which could lead to damaged threads or brake rotor warping, and under-tightening, which could cause the wheel to become loose. Technician B's statement is incorrect as well.
A jack should only be used to lift the vehicle, not to support it for an extended period while service is performed. To ensure safety, the vehicle should be supported with jack stands during tire and wheel service to prevent it from collapsing if the jack were to fail.
Technician A is correct because using an impact gun is recommended to tighten wheel nuts. An impact gun applies a strong and sudden rotational force, which ensures that the wheel nuts are properly tightened. This is important for the safety and stability of the vehicle.
Technician B is incorrect because it is not okay to use the jack to support the vehicle while performing tire and wheel service. The jack is only designed to lift the vehicle temporarily for tire changes or other service tasks.
For stability and safety, it is important to use proper jack stands to support the vehicle once it is lifted. This prevents the vehicle from falling and potentially causing injury.