Red Seal Boilermaker Practice Exam

What are "bolt torque specifications"?

1. Guidelines for the color-coding of bolts

2. Instructions on how to loosen bolts safely

3. Guidelines indicating how much torque should be applied to bolts to ensure proper fastening

4. Recommendations for bolt replacement intervals

The correct answer is: Guidelines indicating how much torque should be applied to bolts to ensure proper fastening

Bolt torque specifications refer to specific guidelines that indicate the amount of torque, usually measured in foot-pounds or Newton-meters, that should be applied to a bolt when fastening it. This specification is critical to achieving the correct tension in the fasteners, ensuring that the joint remains secure under operational conditions. Proper torque application prevents issues such as joint failure, loosening due to vibration, and even damage to the components being fastened. When the correct amount of torque is applied, it ensures that the bolt stretches just enough to create a strong clamping force without being overtightened. Overtightening can lead to stress fractures or permanent deformation of the bolt or the material it is securing, while undertightening can result in inadequate clamping force, leading to failures like leaks or disassembly under load. The other choices do not accurately describe bolt torque specifications. The color-coding of bolts relates to their grade or type, not their torque application. Instructions on loosening bolts focus on a different procedure rather than on fastening. Recommendations for bolt replacement intervals are about lifecycle management of components rather than specific torque application during installation.