Which of the following is NOT a type of compressor?

The option identifying centrifugal screw as not being a type of compressor is accurate. While there are numerous types of compressors used in HVAC systems, including scroll, reciprocating, and rotary compressors, a "centrifugal screw" is not a recognized category within compressor types.

Centrifugal compressors and screw compressors are indeed two distinct types, but they do not combine to form a "centrifugal screw" type. Centrifugal compressors use a rotating disk or impeller to increase the velocity of the gas, while screw compressors utilize a pair of intermeshing screws to compress air or gas. Understanding this distinction in terminology is key to mastering HVAC principles, as it highlights the pre-existing types of compressors accurately represented in the industry.

Recognizing how various compressors function and their applications helps in diagnosing issues and selecting the appropriate equipment for specific HVAC needs.