Which metal is the best conductor of electricity?
A) Brass B) Silver C) Copper D) Gold
B
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Preheating a part before starting the weld reduces the stress caused by the weld and helps the filler metal flow.
Answer the following statement true (T) or false (F)
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The abbreviation for across flats is ____.
A. AF B. ACR FLT C. ACRFLT D. ACR. FLT.
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The GFRC skin is typically
A) 1/2 in. to 3/4 in. thick. B) 2 in. to 3 in. thick. C) 1 in. to 2 in. thick. D) 1-1/2 in. to 2-1/2 in. thick. E) none of the above.
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In fluorescent lamps, electrons emitted from the cathodes strike particles of ____________________ vapor.
Fill in the blank(s) with the appropriate word(s).
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