How Can Semi Hermetic Compressors Be Characterized

Question: A common application for centrifugal compressors is:

Answer: Commercial water chilling systems.

Question: A compressor that compresses gas between a fixed spiral and an orbiting spiral is a:

Answer: Scroll compressor.

Question: A compressor that uses a large off-center rotating shaft and multiple blades that follow the cylinder walls as the shaft rotates is a:

Answer: Rotary blade rotary compressor.

Question: A compressor that uses an impeller to throw refrigerant from the center outward is a:

Answer: Centrifugal compressor.

Question: A compressor that uses an offset rolling piston that seals against a blade that remains stationary and moves in and out of its slot to seal against the rolling piston is a:

Answer: Stationary blade rotary compressor.

Question: All refrigeration compressors are designed to pump:

Answer: Only vapor.

Question: An advantage of open drive compressors is that:

Answer: The motor and compressor can be replaced separately.

Question: An oil slinger is used with reciprocating compressors that are lubricated by:

Answer: Splash lubrication.

Question: Assuming they both have the same condenser temperature, which application requires more horsepower to produce a ton of cooling: a 0°F evaporator, or a 40°F evaporator?

Answer: The 0°F evaporator, because of the higher pressure difference

Question: Compressor cylinder unloading reduces the capacity of a reciprocating compressor by:

Answer: Making the valves in the head inoperative.