El motor de CC _____ se utiliza cuando el par de arranque necesario es alto y es deseable control de velocidad.

a. sin escobillas
b. compuesto
c. en serie
d. en derivaciĆ³n


b. compuesto

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A ____ is used to deactivate the lighting after the last worker has left.

A. toggle switch B. photocell C. pressure switch D. time clock

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Sensors for the mixing valve control are located:

A) On the supply line and on the boiler. B) Outside the building and on the supply line. C) Outside the building and on the boiler. D) Outside the building, on the supply line, and on the boiler.

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One cubic meter represents a cube shape that measures 1 meter in all three dimensions. How long is each side in centimeters?

A) 1 cm
B) 10 cm
C) 100 cm
D) 1,000 cm

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Reciprocating compressors have ____.

A. a piston and cylinder B. two scrolls that mesh together C. a rotor to compress the refrigerant D. a large fan compressor component

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