Engine: Refrigeration AC

1. A a hermetically sealed water cooler with a 2 lb. refrigerant charge
2. B a self-contained walk-in freezer with a 60 lbs. refrigerant charge
3. C a 25 ton air conditioning system set up as a split plant with the condensing unit on deck
4. D a 200 ton low pressure centrifugal chiller for cargo hold air conditioning

Tip: press A-D to answer