A thin spherical vessel of 1000 mm diameter and 2 mm thickness is subjected to an internal pressure of 4 MPa. The Young's modulus and Poisson's ratio are 200 Gpa and 0.3 respectively. Find the following :

(i) Hoop stress

(ii) Change in volume of the vessel

2Medium10 marks

Define overall efficiency, boiler efficiency, cycle efficiency, mechanical efficiency and generator efficiency of a Rankine cycle based power plant and also prove that :

3Medium15 marks

For a eutectoid steel, draw and label continuous cooling transformation (CCT) diagram. Explain normalizing and hardening heat treatment with regard to phase transformation using relevant cooling curves on CCT diagram.

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