Inverters designed for installation in North America will have a(n) ____________________ Hz output frequency.

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


60
sixty

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One of the most commonly used characteristics of building construction materials is the ____-value.

A. P B. T C. R D. Z

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A) Eight B) Five C) Six D) Four

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How should a thermostat be connected to a system that has two transformers: one in the furnace and one in the air conditioner?

A) Wire the furnace to RH and the air conditioner to RC. B) Tie the transformers together and leave off the R terminal. C) Wire both transformers to the R terminal. D) Wire the furnace to RC and the air conditioner to RH.

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