STEAM POWER PLANT 177
2.Describe the various types of grates used with hand fired furnaces.
3.Name the various methods of ash handling. Describe the pneumatic system of ash handling.
Why it is essential to quench the ash before handling?
4.(a) Describe the various methods used to fire pulverised coal.
(b) Make a neat sketch of ball and Race mill and explain its working.
(c) State the advantages of pulverised fuel firing.
5.Name the different types of coal-pulverising mills. Describe Ball-Mill.
6.Describe the various types of burners used to burn pulverised coal.
7.Name various draught systems. Describe the operation of a balanced draught system.
8.What is the cause of smoke? State the factors necessary for its prevention.
9.Name the different types of chimneys used. State the advantages of steel chimney. Derive an
expression for the height of chimney.
10.Describe the various methods used to control the degree of superheat. Name the advantages
gained by using super-heat steam.
11.What is condenser? Name the different types of condenser. Describe the operation of
(i) Surface condenser (ii) Jet condenser.
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.