What is the normal frequency of AC power in the United States?

A) 90 cycles per second B) 60 cycles per second
C) 25 cycles per second D) 50 cycles per second


B

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Wet-bulb temperature is generally (higher ________ / lower ________) than dry-bulb temperature.

What will be an ideal response?

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Lycopene is a carotenoid giving tomatoes their red color

Indicate whether the statement is true or false

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The metric designator for 6-inch trade-size rigid metal conduit is __________.

a. 100 b. 155 c. 175 d. 208

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Which statement most accurately describes TAB?

A) TAB is a type of test instrument. B) TAB is used to conduct measurements and adjustments that are specific to testing and balancing, which are not normally performed in regular HVACR work. C) TAB is a training organization within the HVACR industry. D) TAB is an optional part of the installation process.

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