Questions: 11. When welding several pieces of oddly shaped metal together, secure them with a A. parallel clamp. B. sheet metal locking tool. C. chain clamp. D. locking plier wrench.

The answer is C: chain clamp.

Explanation for each option:

A. Parallel clamp: This type of clamp is typically used for holding pieces of wood or metal parallel to each other. It is not specifically designed for securing oddly shaped metal pieces.

B. Sheet metal locking tool: This tool is generally used for holding sheet metal in place, but it may not be suitable for securing oddly shaped metal pieces together.

C. Chain clamp: Chain clamps are versatile and can be adjusted to hold irregularly shaped objects securely. They are ideal for welding oddly shaped metal pieces together because the chain can wrap around the pieces and hold them in place.

D. Locking plier wrench: While useful for gripping and holding objects, locking plier wrenches may not provide the necessary flexibility and reach to secure several oddly shaped metal pieces together effectively.

In summary, a chain clamp is the most suitable tool for securing several pieces of oddly shaped metal together for welding.