What are the factors that determine the electrical resistance of a length of copper wire?

A. Overall length of the wire
B. Temperature of the wire
C. Sectional area of the wire
D. All of the above


Answer: D

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If the refrigerant is recovered improperly from a water-cooled condenser:

A) The water may freeze. B) The water may boil. C) All the water may drain out of the condenser. D) The oil dissolved in the refrigerant may crystallize.

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