ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 10

Q91. There is a greater possibility of occurrence
of corona during
 A.  dry weather
 [Wrong Answer]
 B.  winter
 [Wrong Answer]
 C.  summer heat
 [Wrong Answer]
 D.  humid weather
 [Correct Answer]
 E.  none of the above
 [Wrong Answer]
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Q92. In A.C.S.R. conductors, the insulation
between aluminum and steel conductors
is
 A.  insulin
 [Wrong Answer]
 B.  bitumen
 [Wrong Answer]
 C.  varnish
 [Wrong Answer]
 D.  no insulation is required
 [Correct Answer]
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Q93. Corona usually occurs when the electrostatic
stress in air around the conductor
exceeds
 A.  6.6 kV (r.m.s. value)/cm
 [Wrong Answer]
 B.  11 kV (r.m.s. value)/cm
 [Wrong Answer]
 C.  22 kV (maximum value)/cm
 [Wrong Answer]
 D.  30 kV (maximum value)/cm
 [Correct Answer]
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Q94. In a tap changing transformer, the tappings
are provided on
 A.  primary winding
 [Wrong Answer]
 B.  secondary winding
 [Correct Answer]
 C.  high voltage winding
 [Wrong Answer]
 D.  any of the above
 [Wrong Answer]
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Q95. The angular displacement between two
interconnected stations is mainly due
to
 A.  armature reactance of both alternators
 [Wrong Answer]
 B.  reactance of the interconnector
 [Correct Answer]
 C.  synchronous reactance of both the
alternators
 [Wrong Answer]
 D.  all of the above
 [Wrong Answer]
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Q96. The skin effect of a conductor will
reduce as the
 A.  resistivity of conductor material increases
 [Correct Answer]
 B.  permeability of conductor material
increases
 [Wrong Answer]
 C.  diameter increases
 [Wrong Answer]
 D.  frequency increases
 [Wrong Answer]
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Q97. Which of the following distribution systems
is the most economical ?
 A.  A.C. 1-phase system
 [Wrong Answer]
 B.  A.C. 3-phase 3 wire system
 [Wrong Answer]
 C.  A.C. 3-phase 4 wire system
 [Wrong Answer]
 D.  Direct current system
 [Correct Answer]
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Q98. Power loss due to corona is not directly
proportional to
 A.  spacing between conductors
 [Correct Answer]
 B.  supply voltage frequency
 [Wrong Answer]
 C.  phase-neutral voltage
 [Wrong Answer]
 D.  all of the above
 [Wrong Answer]
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Q99. In the design of a distributor which of
the following is the major consideration
?
 A.  Voltage drop
 [Correct Answer]
 B.  Current carrying capacity
 [Wrong Answer]
 C.  Frequency
 [Wrong Answer]
 D.  kVA of system
 [Wrong Answer]
 E.  None of the above
 [Wrong Answer]
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Q100. Which of the following cause transient
disturbances ?
 A.  Faults
 [Wrong Answer]
 B.  Load variations
 [Wrong Answer]
 C.  Switching operations
 [Wrong Answer]
 D.  Any of the above
 [Correct Answer]
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CURRENT AFFAIRS QUIZ OF DAY-10 February 2017
General Science Online MCQ-2

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