How does a torque wrench contribute to escalator maintenance?

A torque wrench plays a crucial role in escalator maintenance by measuring the amount of torque applied when fastening components. This ensures that the fasteners are tightened to the manufacturer's specifications, which is essential for the safe and reliable operation of the escalator. Proper torque application prevents components from being over-tightened, which could lead to damage, or under-tightened, which might result in loose parts that could cause malfunction or hazards.

In escalator maintenance, different components require specific torque values to maintain structural integrity and safety. By using a torque wrench, technicians ensure that these specifications are met, thereby enhancing the longevity and reliability of the escalator system. This practice not only supports correct assembly but also helps prevent wear and tear on moving parts, ultimately leading to fewer maintenance issues and improved safety for users.

The other choices do not accurately describe the function of a torque wrench. While it is true that screws need to be tightened, the specific role of a torque wrench goes beyond just that. It is not involved in directing electrical flow or inspecting safety features, as its primary purpose is related to torque measurement.