1. Describe the electrolytic process with its applications and limitations for the conservation of energy.

2. Explain different cogeneration cycles in detail.

3. Explain energy efficient control and starting of electric motors.

4. Discuss different schemes for energy conservation in lighting.

5. How is the electric load analysis for refrigerators carried out?

6. Give a detailed energy analysis for compressors. How can the energy be conserved in this case?

7. A drilling machine, drawing continuously 4 kW of input power and with an efficiency of is used in drilling a bore in an aluminium block of 5 kg of mass. How much will be the rise in temperature of the block at the end of 100 seconds

Assume 30% of the energy imparted to the block is lost to surroundings and the balance is absorbed by the block in its uniform heating. The specific heat of aluminium block 900 K).

8. "Energy conservation and energy efficiency are separate, but related concepts." Justify the above statement with suitable examples.

9. A boiler uses furnace oil to generate steam. The furnace oil consumption is 50 kg/hr and the total losses in the boiler are 25%. Calculate the amount of steam generated per hour by considering 600 kcal is required to generate 1 kg of steam. Consider GCV (Gross Calorific Value) of furnace oil as 10200 kcal/kg.

10. Distinguish between 'preliminary energy audit' and 'detailed energy audit'.

11. Consider the ac load as shown in Figure 1.

<img src='./qimages/15561-11.jpg'>

Compute the various powers absorbed in the two load branches.

12. Write short notes on any two of the following:

Specific Energy Consumption

Feeder Loss Evaluation

Energy Audit

Power Factor Improvement