The primary source of heat for a year-round packaged air conditioner is _____

a. electricity
b. natural gas
c. hot water
d. steam


b

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____________________ marks are deep, vertical scratches on the skirt of the piston.

Fill in the blank(s) with the appropriate word(s).

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Si se necesitan andamios o escaleras para instalar el aislamiento de tubería, es necesario ________.

a. contar con un capataz y un mecánico. b. contar con un carpintero. c. contar con un equipo de dos personas. d. contar con un trabajador de aislamiento

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Always perform a visual inspection of a pump for problems _____

A) at the end of the shift B) once per week C) at the beginning of the shift D) when the pump is operating at normal temperature

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When making GTAW V-groove welds on aluminum plate, clean each completed weld with a(n) _____

a. bastard file b. chipping hammer c. aluminum wire brush d. stainless-steel wire brush

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