CS/B.Tech(PWE)/SEM-6/PWE-604/2012
2012
POWER TRANSMISSION AND DISTRIBUTION
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) In a long transmission line under no-load condition
a) the receiving end voltage is less than the sending
end voltage
b) the sending end voltage is less than the receiving
end voltage
c) the sending end voltage is equal to the receiving
end voltage
d) none of these.
ii) For stable operation of interconnected system, the
passive element that can be used as the
interconnecting element is
a) Reactor
b) Resistor
c) Capacitor
d) Resistor and capacitor.
iii) If the insulation resistance of a cable of length 10 km is
1 mega ohm its insulation resistance for 50 km length
will be
a) 1 mega ohm
b) 5 mega ohm
c) 0.2 mega ohm
d) none of these.
iv) Series capacitors can be used in distribution lines
a) to provide reactive power compensation
b) to reduce the receiving end voltage under light
load conditions
c) to reduce voltage drop
d) to reduce line losses.
v) In a cable of conductor diameter 'd' and overall
diameter with dielectric 'D', the maximum dielectric
stress
a) occurs at conductor surface and is proportional to
'd'
b) occurs at conductor surface and is proportional to
1/d
c) occurs at the middle of the dielectric and is
proportional to 1/D
d) occurs at the outer surface of the dielectric and is
proportional to D
e) None of these.