Power Plant Engineering

12. What is a steam trap ? Where it is located ? Describe Ball Float steam trap.
13. What are the requirement of a well designed pipe line in a steam power plant. Name and
describe the various expansion bends used in piping steam.
14. What are the advantages of using large capacity boilers ? Describe the operation of:
(i) Velox Boiler (ii) Benson Boiler (iii) Loeffler Boiler.
15. State the advantages and disadvantages of a steam power station as compared to hydro-
electric power station and nuclear power station.
16. Describe the various factors which determine the location of a steam power station.
17. Write short notes on the following: (a) Cyclone and collector (b) Industrial steam turbines
(c) Hydraulic test of boiler (d) Draught fans (e) Steam separator (f ) Economiser (g) Cyclone
fired boilers (h) Pressure Filter. (i) Air preheater (j) Pipe fittings (k) Heat flow in steam plant.
18. What is the difference between water-tube and fire tube boilers ? Describe the working
principle of Cochran Boiler or Lancashire Boiler.
19. (a) How will you classify various types of boilers ? (b) Write short notes on the following:
(i) Efficiency of boiler
(ii) Maintenance of boiler
(iii) Accessories of a boiler
(iv) Overall efficiency of steam power plant
(v) Steam turbine specifications
(vi) Causes of heat loss in boiler.

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POWER PLANT ENGINEERING
20. Explain the methods used to increase thermal efficiency of a steam power plant.
21. Write short notes on the following:
(a) pH value of water.
(b) Power plant pumps.
(c) Steam turbine capacity.
(d) Comparison of forced and induced draft system for boiler.
(e) Principles of steam power plant design.
(f) Korba super thermal power station.
(g) Singrauli super thermal power plant.
22. Determine the quantity of air per kg of coal burnt in a furnace if the stack height is 58 m and
draught produced is 35 mm of water. The temperature of flue gases is 380 C.

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