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ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 3

Harikesh Yadav
Q21. Which of the following equipment is
used to limit short-circuit current level
in a substation ?
 A.  Isolator
 [Wrong Answer]		  B.  Lightning switch
 [Wrong Answer]
 C.  Coupling capacitor
 [Wrong Answer]		  D.  Series reactor
 [Correct Answer]
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Q22. For exact compensation of voltage drop
in the feeder the booster
 A.  must be earthed
 [Wrong Answer]		  B.  must work on line voltage
 [Wrong Answer]
 C.  must work on linear portion of its
V-I characteristics
 [Correct Answer]		  D.  must work on non-linear portion of
its V-I characteFistics
 [Wrong Answer]
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Q23. System grounding is done so that
 A.  inductive interference between power
and communication circuits can be
controlled
 [Wrong Answer]		  B.  the floating potential on the lower
voltage winding for a transformer is
brought down to an insignificant
value
 [Wrong Answer]
 C.  the arcing faults to earth would not
set up dangerously high voltage on
healthy phases
 [Wrong Answer]		  D.  for all above reasons
 [Correct Answer]
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Q24. The effective resistance of a conductor
will be the same as ‘ohmic resistance’
when
 A.  power factor is unity
 [Wrong Answer]		  B.  current is uniformly distributed in
the conductor cross-section
 [Correct Answer]
 C.  voltage is low
 [Wrong Answer]		  D.  current is in true sine wave form
 [Wrong Answer]
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Q25. The surge resistance of cables is
 A.  20 ohms
 [Wrong Answer]		  B.  50 ohms
 [Correct Answer]
 C.  200 ohms
 [Wrong Answer]		  D.  300 ohms
 [Wrong Answer]
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Q26. In the cables sheaths are used to
 A.  prevent the moisture from entering
the cable
 [Correct Answer]		  B.  provide strength to the cable
 [Wrong Answer]
 C.  provide proper insulation
 [Wrong Answer]		  D.  none of the above
 [Wrong Answer]
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Q27. Which of the following are the constants
of the transmission lines ?
 A.  Resistance
 [Wrong Answer]		  B.  Inductance
 [Wrong Answer]
 C.  Capacitance
 [Wrong Answer]		  D.  All of the above
 [Correct Answer]
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Q28. Which of the following methods is used
for laying of underground cables ?
 A.  Direct laying
 [Wrong Answer]		  B.  Draw-in-system
 [Wrong Answer]
 C.  Solid system
 [Wrong Answer]		  D.  All of the above
 [Correct Answer]
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Q29. Most of the high voltage transmission
lines in India are
 A.  undergound
 [Wrong Answer]		  B.  overhead
 [Correct Answer]
 C.  either of the above
 [Wrong Answer]		  D.  none of the above
 [Wrong Answer]
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Q30. Overhead lines generally use
 A.  copper conductors
 [Wrong Answer]		  B.  all aluminium conductors
 [Wrong Answer]
 C.  A.C.S.R. conductors
 [Correct Answer]		  D.  none of these
 [Wrong Answer]
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