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A pump is installed in an apartment building to lift water from ground level to the roof top water tank with the capacity of 10,000 litres. Total head of lift is 18 m and pumping time is 30 minutes to fill the tank completely. Assuming acceleration due to gravity (g) as 10 m/sec² and efficiency of the pump as 80 percent, the power requirement of the pump in kW will be __________
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- 2.5 to 7.3
- 2.2 to 4.3
- 1.2 to 1.3
- 5.2 to 6.3
Correct Option: C
1.2 to 1.3
| Power = | ||
| Time |
| Power = | ||
| Time |
| Power = | ||
| 30 min |
| Power = 10000 × 10 × | sec | |
| 1800 |
Power = 1000 W
As the pump is working at 80% efficiency,
| Power = | ||
| 8 |
Power = 1.25 kW
