_____ is the transfer of heat through the motion of a fluid, such as air or water.

A. Radiation
B. Conduction
C. Convection
D. Emission


Answer: C

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Retempering mortar is acceptable under the following condition:

A. It used within 3 hours of the remixing. B. It is used within 2½ hours of the initial mixing. C. The amount of water added is more than the amount lost to evaporation. D. The amount of water added is less than the amount lost to evaporation.

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How can longer duty cycles affect the capacity of an electromagnet?

a. Longer duty cycles allow the magnet to cool off, improving magnetic performance. b. Longer duty cycles make the electromagnet hotter, improving magnetic performance. c. Longer duty cycles make the magnet hotter, reducing the magnetic force it produces. d. Longer duty cycles reduce the amount of time to complete a job.

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A 1000 W load that operates for one hour consumes the same amount of energy as a 100 W load that operates for 10 hours

Indicate whether the statement is true or false

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The IC chip parameter that describes the output current generated in the logical "O" state under specified load conditions is:

A) IOH B) IIH C) IOL D) IIL

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