Which method is not used to hold parts in line during assembly?

Which method is not used to hold parts in line during assembly?

• A. Riveting
• B. Grinding
• C. Backing
• D. Welding

Answer: (B)

The ability to keep parts aligned during assembly comes from fixtures, clamps, and joining methods that physically hold the pieces in the correct relationship as the joint is formed. Riveting and welding are ways to secure parts once alignment is established: rivets are driven to pull the pieces together, often with backing to support surfaces and prevent distortion, and welding uses clamps and fixtures to maintain exact position while the metal fuses. Grinding, by contrast, is a material-removal operation used to fit or finish surfaces after the parts have been held in place. It does not serve to hold components in line during the joining process, and using it to do so could actually alter the alignment. So grinding is not used to hold parts in line during assembly.

The ability to keep parts aligned during assembly comes from fixtures, clamps, and joining methods that physically hold the pieces in the correct relationship as the joint is formed. Riveting and welding are ways to secure parts once alignment is established: rivets are driven to pull the pieces together, often with backing to support surfaces and prevent distortion, and welding uses clamps and fixtures to maintain exact position while the metal fuses. Grinding, by contrast, is a material-removal operation used to fit or finish surfaces after the parts have been held in place. It does not serve to hold components in line during the joining process, and using it to do so could actually alter the alignment. So grinding is not used to hold parts in line during assembly.