CS/B. TECH (PWE)/SEM-6/PWE-603/2012
2012
ELECTRICAL EQUIPMENT IN POWER STATION
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 any ten of the following:
10 × 1 = 10
i) Silicon is added to CRGO steel for manufacturing of
core stamping to reduce
a) hysteresis loss
b) eddy current loss
c) windage loss
d) all of these.
ii) Which type of bearing is used to support the rotor of
large size turbo generator ?
a) Tilting pad type
b) Journal type
c) Thrust pad type
d) Roller type.
iii) A 210 MW generator neutral is generally grounded
through
a) high resistance box
b) low resistance box
c) distribution transformer & a low resistance at LV
side
d) reactor box.
iv) At under excited condition which part of the generator
gets over heated ?
a) Stator winding over hand
b) Rotor winding over hand
c) Retaining ring portion
d) All of these.