engineering recuitment PGCIL Diploma Trainee Mock Test 2024 Utilization of Electrical Energy Lamps and Bulbs
A room of dimensions 10 m × 12 m is to be lighted by 20 lamps of uniform illumination of around 100 lm/m2. If the output of each lamp is around 1000 lumens, what will be the utilization factor of the room?
1
0.4
2
0.6
3
0.45
4
0.5