When service equipment hoses with manual shutoff valves are not connected to an A/C system, the valves should be in the:

A) mid-seated position
B) back-seated position
C) closed position
D) open position


Answer : C) closed position

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Which of the following forces are always present in an AC circuit?

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You are considering five projects, all of which can be considered to last indefinitely. If the com­pany’s MARR is 15% per year, determine which should be selected if they are (a) indepen­dent projects, and (b) mutually exclusive alternatives.

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