When using backing rings with buttons, the buttons must be removed by striking them with a chipping hammer. 

Learning styles and preferences do not affect learning behavior.

When codes are specified for a project, the codes are: 

Preheating and postheating does not help control distortion. 

It is acceptable to use a stainless-steel wire brush on stainless steel after the brush has been used to clean a carbon steel weld. 

In most cases, qualification for groove welds also qualifies the welder for fillet welds. 

Bioterrorism: Involves such weapons of mass destruction as anthrax, botulism, and smallpox

Residual stress is the stress remaining in a weldment as a result of heat. 

When preparing the test strip, round the edges to a smooth _____ radius. 

In SMAW, qualifying with an F4 electrode will qualify the welder to weld with F1, F2, F3 and F4 electrodes.