Automatic pump-down systems are equipped with a ____________________ to prevent refrigerant from reaching the evaporator.

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


solenoid valve

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The rotating magnetic field in a shaded-pole induction motor is created by a ____ coil wound on one side of each pole piece

a. transformer b. short c. static d. shading

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A digital multimeter is faster at detecting voltage changes in a circuit than a lab scope.

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

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Two common methods for measuring airflow in residential systems are:

A) Temperature rise or static pressure drop. B) Electronic flow hoods. C) Velocity pressure transducers. D) Fan tip speed and a fan curve plot.

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In the above figure, the acceleration will be the slowest if the wiper arm of R12 is __________.

A. to the far right B. in the middle C. to the far left

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