?Research for welding in space dates back to the ____ with experiments done on board the U.S. Skylab.
A. ?1940s
B. ?1950s
C. ?1960s
D. ?1980s
Answer: C
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On a package air-conditioning system, which refrigerant lines must be field-installed?
A. Discharge and suction. B. Liquid and suction. C. Discharge and liquid. D. No lines need to be field-installed.
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Use the accompanying figure. Calculate the sales tax to the nearest cent.
A. $6.10 B. $6.20 C. $6.60 D. $6.95
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When reading instructions or a series of steps, one should _____
A) read only the steps that he or she doesn?t know B) perform the steps even if he or she doesn?t understand them C) read the directions completely D) skim the directions quickly
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?Under stagnation conditions, fluid in the collector may vaporize.
Answer the following statement true (T) or false (F)
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