The earth has a thin coating of material that is called ____

A) rock
B) air
C) soil
D) water


C

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The majority of biopower electrical plants utilize ____ technology, with an average efficiency of ____

a. direct combustion; 35-40% c. combined cycle; 50% b. co-firing; 60% d. hydronics; 20-25%

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An electrical conductor is an element with ________ electrons in its outer orbit

A) Exactly 4 B) Less than 4 C) Less than 2 D) More than 4

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Explain decimal tolerances.

What will be an ideal response?

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What must be done when charging a zeotropic refrigerant into an operating system?

a. Charging by superheat. b. Charging liquid through a metering orifice on the low-pressure side. c. Inverting the refrigerant cylinder. d. Adding charge only through the high-pressure side.

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