Question 1 (20 marks)
- Compare between the mecury vapour lamp and sodium vapour lamp?
- Discus the drawbacks of gaseous discharge lamps?
- Design a suitable lighting scheme for a factory 120 m × 40 m with a height of
7 m. Illumination required is 60 lux. State the number, location and mounting height of 40 W fluorescent tubes giving 45 lm/W.
Depreciation factor = 1.2 ; utilization factor = 0.5.
Question 2 (20 marks)
- Classify the light sources? What are the advantages of incandescent lamps?
- Mention the methods of lighting calculations? What are the types of lighting schemes?.
- A drawing hall 30m x 15 m with ceiling height of 5 m
Question 3 (20 marks)
- .
- A high-pressure mercury-vapour lamp is mounted at a height of 6 m in the middle of a large road crossing. A special reflector directs 100 C.P. maximum in a cone of 70º to the vertical line. Calculate the intensity of illumination on the road surface due to this beam of 100 C.P.
Question 4 (20 marks)
- What are the considerations should be taken in street lighting?
- Explain the importance of earthing systems in electrical installations?
- Explain the important specifications should be in installation boards?
Question 6 (10 marks)
- Sketch the connection diagram for lighting two lamps from two different places?.