A correction factor must be calculated for an extension on a torque wrench if it is not at what angle to the wrench?

The correct answer, which involves a torque wrench needing to be at a specific angle, pertains to the principle of torque application related to the lever arm. When a torque wrench is applied at an angle, particularly at 90 degrees, the maximum torque is transmitted effectively because the force applied is perpendicular to the wrench's lever arm. This perpendicular application ensures that the full force is converted into torque without any loss due to angular variation.

When the extension on a torque wrench is not at this 90-degree angle, the lever arm's effective length changes, necessitating a correction factor to maintain accuracy in the torque applied. If the wrench is used at an angle other than 90 degrees, the torque produced can be less than intended because the force component acting along the line needed for effective torque application is reduced. This results in the need for adjusting the torque measurement to account for the angle deviation from the ideal position.

Therefore, maintaining the wrench at a 90-degree angle is crucial for ensuring the proper application of torque and accuracy in fastening components within aerospace assembly processes.