178 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.