Red Seal Industrial Mechanic (Millwright) Practice Exam

What is the function of a mechanical torque wrench?

1. To apply a random amount of torque to any fastener.

2. To apply a specific amount of torque to a fastener during tightening.

3. To measure the amount of torque applied to a bolt after installation.

4. To loosen fasteners without measuring torque.

The correct answer is: To apply a specific amount of torque to a fastener during tightening.

A mechanical torque wrench is specifically designed to apply a precise amount of torque to a fastener when tightening it, which is crucial in achieving proper clamping force and ensuring that connections are secure without exceeding the fastener's limits. This tool helps prevent both under-tightening and over-tightening, both of which can lead to mechanical failure or damage. By using a calibrated scale, the operator can set the desired torque value, allowing for consistent and repeatable results in assembly procedures. The ability to apply a predetermined and measured torque makes it an essential tool in various industries, such as automotive and manufacturing, where proper assembly specifications are critical for safety and performance.