railway UPMRC SCTO 2024 Mock Test Utilization of Electrical Energy Illumination

A hall of size 25 m by 25 m is to be illuminated with 60 lux. If lamp efficiency is 50 lumens/watt, utiiisation factor is 0.8, and candle power depreciation is 25% the total wattage required is:

1
3.75 kW
2
5.5 kW
3
4.25 kW
4
2.5 kW
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