CS/B.Tech-PWE(NEW)/SEM-6/PWE-601/2013
2013
STEAM GENERATOR & 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.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following :
10x1 = 10
i) The function of scanner air fan in any coal fired
Thermal Power Plant is
a) to mix scanning air with primary air for supplying
excess air
b) to prevent ingress of coal dust in flame scanners
c) to prevent overheating of flame scanners from
radiation heat
d) to increase the turbulence in the pulveriser
discharge pipe.
ii) The arrangement provided to arrest furnace distortion
is
a) Buckstay girders
b) Expansion joints
c) Anchors
d) all of these.
iii) Steam separation inside the drum takes place under
which principle ?
a) Centrifugal Action
b) Gravity Separation
c) Heating of Steam
d) Centrifugal Action and Gravity Separation.
iv) In the boiler economizer tubes allowable type of heat
addition is
a) sensible
b) nucleate Boiling
c) no boiling is desirable in boiler economizer tubes
d) departure from nucleate boiling.