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RAC
Scale formation in condenser is responsible for:
- Increase in heat transfer
- Decrease in heat transfer
- Increase of condenser pressure
- Both (b) and (c)
Which equipment pulls down the vacuum to 500 microns?
- Two stage rotary pump
- Single stage centrifugal pump
- Hermetic reciprocating compressor
- Semi hermetic reciprocating compressor
What is the pH level of water used for final rising of condenser tubes after descaling?
- 4 to 4.5
- 7 to 7.5
- 10 to 12
- 9 to 10.5
Why the water flow switch is bypassed to test for good HP control switch during system operation?
- To make the unit not to trip
- To raise the oil pressure more
- For stopping the unit immediately
- To lower the heal pressure in compressor
What is the reason for scale formation in water tubes of condenser?
- Algae
- Fungus
- Chemicals and salts
- Condenser rusted externally
