To keep vise chains from becoming stiff and unable to wrap around a pipe, apply _____
a. water
b. oil
c. solder
d. rosin
b
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Extemporaneous speaking is delivering a speech with little or no time for preparation
Indicate whether the statement is true or false
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Liquid lines need to be insulated:
A) If they travel through an unusually hot space. B) For systems using HFC refrigerants. C) If they are run close enough to the hot suction line to pick up heat from it. D) Always.
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The figure above shows a _____.
a. first-class lever b. second-class lever c. third-class lever d. compound lever
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In what year were genetically engineered crops first introduced?
a. 1991 c. 1996 b. 1993 d. 1998
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