The two principal shielding gases used for GTAW are _____
A) argon and carbon dioxide B) argon and helium
C) hydrogen and carbon dioxide D) nitrogen and oxygen
B
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According to the text, the true test of the goals and objectives that you set is that you can answer yes to each of the following questions except:
A) Is the standard of performance kept secret? B) Are the goals clearly defined? C) Have the goals been clearly communicated? D) Is the goal achievable?
?What is a polyswitch?
A. ?A new kind of stalk switch B. ?A PTC circuit protection device C. ?A multi-position toggle switch D. ?A programmable function, generic smart switch
A(n) ____________________ switch is used to control a 240-volt load from one location.
Fill in the blank(s) with the appropriate word(s).
Which of the following are considered to be "heavy metals" that can contaminate soils and the food chain?
A) cadmium B) lead C) zinc D) copper E) all of the above