The output of a three input (A, B, and C) AND gate is connected to a two input OR gate. A second input to the OR gate is labeled D. The Boolean expression representing this logic circuit is:

A) X = (A + B + C) + D B) X = ABC + D C) X = (A + B + C) D D) X = (ABC)D


B

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A(n) ____________________ heat pump system uses air to transfer the heat to the conditioned space and water as the heat transfer medium for the heat exchanger used as the condenser in the cooling cycle and the evaporator in the heating cycle.

Fill in the blank(s) with the appropriate word(s).

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Gloves should be worn when cutting hot chips

Indicate whether the statement is true or false

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Most integrated circuit analog switches utilize what type of circuitry?

A) solenoid B) BJT C) MOSFET D) JFET

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How do infrared heaters transfer heat?

A) They heat the air molecules, and the air heats the people in the room. B) They only heat objects that they are touching. C) Air is circulated over them and distributed via ductwork. D) They directly heat people and objects through radiation.

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