CS/B.Tech(PWE)/SEM-6/PWE-602/2012
2012
STEAM TURBINE & ITS AUXILIARIES
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
Answer Question Nos. 1 & 2 and any three questions
from the rest.
1. Choose the correct alternatives for the following : 10x1 = 10
i) Function of fixed blade of a reaction turbine is
a) to convert heat energy into kinetic energy
b) to guide the steam to the moving blade
c) to convert kinetic energy into mechanical energy
d) both (a) and (b).
ii) Impulse balding is used in large utility turbine
a) in 1st stage of IP turbine
b) in last stage of HP turbine
c) in last one or two stage of HP turbine
d) in 1st stage of LP turbine.
iii) Source of PRDS steam is
a) boiler drum b) auxiliary boiler
c) main steam line d) HP heater.
iv) Condenser vacuum is created by
a) ejectors
b) CEP
c) circulating water / cooling water
d) vacuum pump.
v) During normal running, oil supply to the governing
system is from
a) auxiliary oil pump b) DC oil pump
c) main oil pump d) seal oil pump.
vi) All hydraulic tripping circuit passes through
a) starting device b) speeder gear
c) trimming device d) main trip valve