Many patterns of weaving are used by experienced welders to help control the

____________________ in the puddle.



Fill in the blank(s) with the appropriate word(s).


ANS: heat

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The stems on manual stem service valves should be turned with:

A) Either an adjustable jaw wrench or a pair of pliers. B) Either a refrigeration service valve wrench or a pair of pliers. C) Either a refrigeration service valve wrench or an adjustable jaw wrench. D) A refrigeration service valve wrench only.

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