SSC SSC JE Electrical 2025 Mock Test Series (Paper 1 & Paper 2) Utilization of Electrical Energy Illumination
Which of the following statements are correct about the maintenance factor?
I) It is the ratio of illumination under normal working condition to the total lumen given out by the lamp.
II) It is the ratio of illumination under normal working condition to the illumination when the things are perfectly clean.
III) The accumulation of dust, dirt and smoke on the lamp decreases the maintenance factor.
IV) It is the ratio of illumination when the things are perfectly clean to the illumination under normal working condition.
1
Only Statement II
2
Statements I and III
3
Statements III and IV
4
Statements II and III