Which statement is true regarding the setup of a torque wrench?

The statement that it needs to be set according to the manufacturer's specifications before use is correct because the proper functioning of a torque wrench is critical to ensuring that fasteners are tightened to the correct specifications. Each fastener has specific torque requirements based on its size, material, and application, which is detailed in the manufacturer's guidelines.

Following these specifications is essential to avoid under-tightening, which can lead to a joint failing, or over-tightening, which can result in damage to the fastener, the material being secured, or even a safety hazard. Ensuring that the torque wrench is properly set before each use helps maintain integrity in assembly and structural integrity in aircraft components.

Setting the torque wrench after use for future settings is not ideal, as it may result in inaccuracies if the wrench is inadvertently left in an incorrect position. Keeping it at maximum for all types of fasteners is inappropriate because different fasteners require different torque levels, and using excessive torque could lead to damage. Lastly, torque wrenches often require periodic calibration to ensure ongoing accuracy, meaning they need to be checked and adjusted as necessary rather than just calibrated once.