單項選擇題

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

A.purge lube oil from the liquid refrigerant
B.recover water purged from the system
C.separate foul gases from the receiver
D.purge non-condensable gases without losing refrigerant

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單項選擇題

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

A.Sub-cooled liquid
B.Sub-cooled vapor
C.Superheated vapor
D.Liquid

單項選擇題

Flame failure in an automatically fired auxiliary boiler can from a/an （）

A.incorrect electrode setting
B.incorrect nozzle position
C.clogged fuel nozzle
D.broken high tension lead

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A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

你可能感興趣的試題

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

Flame failure in an automatically fired auxiliary boiler can from a/an （）