____ is a good general purpose filler wire that has the highest levels of manganese and silicon.
A. ER70S-2
B. ER70S-3
C. ER70S-6
D. ER70T-1
Answer: C
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Upon completion of a registered apprentice program, apprentice mechanical insulators become _____.
a. masters b. journeymen c. instructors d. foremen
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A trench is an excavation that has a depth greater than its width, and a width that is no greater than _____.
a. 10' b. 15' c. 20' d. 25'
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Machine screws are stronger and more precise than cap screws.
Answer the following statement true (T) or false (F)
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A furnace that is composed of a heat exchanger compartment and a blower compartment is considered
A) a gas-fired boiler furnace. B) an oil-fired boiler furnace. C) a gas forced-warm-air furnace. D) a radiant heat furnace.
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