A five-port valve has one ____ valve.

A. flow
B. cylinder
C. exhaust
D. air inlet


Answer: D

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____ circuit interrupters should be provided for all single-phase, 125-volt, 15- and 20-amp receptacles in dwelling unit locations.

a. Air-fault b. Ground-fault c. Underground d. Floor

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____________________ are the simplest type of semiconductor

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

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A wide band oxygen sensor and a conventional zirconia oxygen sensor can be made with what designs?

A) Finger and thimble B) Cup and planar C) Cup and thimble D) Dual cell and single cell

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Commercial and industrial refrigeration systems:

A) Are only used in production facilities. B) Refer to retail food and cold-storage equipment and facilities. C) Are used only in supermarkets. D) Use three-phase equipment only.

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