Answer / Shitin Kumar

To increase the water flow and pressure at the 11 mtr height level, you can make the following modifications:

1. Increase the diameter of the inlet line from 2" to a larger size such as 3" or 4". This will increase the volume of water flowing through the line and thus increase the flow rate at the cooler.

2. Install a second pump in parallel with the existing one, or upgrade the capacity of the existing pump to 300m3/hr or more, to increase the water flow rate. You can also consider using a higher head pump if possible.

3. Consider installing a pressure boosting system at the cooler location to maintain the desired pressure (1 kg/cm2). This could be achieved by using a pressure tank or a pressure booster pump.

send previousyear question paper for ongc gt 2011 chemical engineering written exam

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