A 1/6 elbow fitting will turn a run of pipe by _____ degrees
A) 30
B) 60
C) 90
D) 120
Answer: B
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The dimension for the length or extent of a seam weld is placed to the ____ of the symbol.
A. bottom B. top C. left D. right
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The process of giving off light by applying an electrical source of energy is called _____.
a. electroluminescence b. forward bias c. photon emission d. reverse bias
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Female screwworm flies need open wounds or injuries in which to lay their eggs
Indicate whether the statement is true or false
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Soot accumulation on the heat exchanger is
A) Not possible with a gas furnace B) Caused by incomplete combustion C) Normal over a period of years D) A natural protective layer for the inside of the heat exchanger
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