____ are materials that do not permit electrons to flow through them easily.

a. Alternators
b. Thermocouples
c. Insulators
d. Conductors


c. Insulators

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Selection and sizing of air ducts is based on _____.

a. air volume b. height c. air temperature d. duct location

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Investigate the following products, noting any design defi ciencies to be addressed or features you believe should be added: vacuum cleaner, clothes dryer, snow blower, popcorn popper, toaster, coff ee maker, and telephone answering machine.

What will be an ideal response?

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When a soap bubble solution is used to detect leaks in a system, the solution isĀ  __________ or __________ onto the piping circuit, primarily at __________. The formation of bubbles indicates that __________.

What will be an ideal response?

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Fewer fins per inch on an evaporator allow more ice to build between defrost cycles.

Answer the following statement true (T) or false (F)

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