engineering recuitment BSPHCL Technician (Electrician) 2024 Mock Test Utilization of Electrical Energy Illumination
Which of the following is defined as the ratio of the total number of lumens reaching the working plane to the total number of lumens emitting from the source?
1
Coefficient of utilisation or utilisation factor
2
Depreciation factor
3
Space to height ratio
4
Maintenance factor