railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Utilization of Electrical Energy Lamps and Bulbs
Arrange the lifespans of lamps from shortest to longest
1. Incandescent lamp
2. CFL
3. Fluorescent
4. LED
Choose the best option given below.
1
1 2 3 4
2
1 3 2 4
3
3 1 2 4
4
4 2 3 1