What happens in a reciprocating compressor when the piston reaches its lowest point?

a. The discharge valve opens.
b. The suction valve closes.
c. Refrigerant leaves the cylinder.
d. Refrigerant begins to enter the cylinder.


b. The suction valve closes.

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For a single-phase compressor, which current-carrying lead does a current-transformer (CT) monitor current in?

a. Neutral b. Run c. Common d. Start

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The material into which a plant cutting is placed in to root is called the ____________________

Fill in the blank(s) with correct word

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The three basic types of condensers used with HVACR systems are:

A) Air cooled, water cooled, and evaporative. B) Standard, metric, and transitional. C) Condensing, noncondensing, and static. D) External, internal, and cross-charged.

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The ____ is a four-character code that identifies a building component specific to the defined layer.

A. LTSCALE code B. major group code C. object line D. linetype

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