ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 9

Q81. A.C.S.R. conductor having 7 steel stands
surrounded by 25 aluminum conductors
will be specified as
 A.  25/7
 [Correct Answer]
 B.  50/15
 [Wrong Answer]
 C.  7/25
 [Wrong Answer]
 D.  15/50
 [Wrong Answer]
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Q82. By using bundled conductors which of
the following is reduced ?
 A.  Power loss due to corona
 [Correct Answer]
 B.  Capacitance of the circuit
 [Wrong Answer]
 C.  Inductance of the circuit
 [Wrong Answer]
 D.  None of the above
 [Wrong Answer]
 E.  All of the above
 [Wrong Answer]
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Q83. The string efficiency of an insulator can
be increased by
 A.  correct grading of insulators of
various capacitance’s
 [Correct Answer]
 B.  reducing the number of strings
 [Wrong Answer]
 C.  increasing the number of strings in
the insulator
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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Q84. Earthing is necessary to give protection
against
 A.  danger of electric shock
 [Correct Answer]
 B.  voltage fluctuation
 [Wrong Answer]
 C.  overloading
 [Wrong Answer]
 D.  high temperature of the conductors
 [Wrong Answer]
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Q85. If variable part of a.nnual cost on account
of interest and depreciation on the capital
outlay is equal to the annual cost of
electrical energy wasted in the conductors,
the total annual cost will be minimum
and the corresponding size of
conductor will be most economical. This
statement is known as
 A.  Kelvin’s law
 [Correct Answer]
 B.  Ohm’s law
 [Wrong Answer]
 C.  Kirchhoffs law
 [Wrong Answer]
 D.  Faraday’s law
 [Wrong Answer]
 E.  none of the above
 [Wrong Answer]
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Q86. The square root of the ratio of line impedance
and shunt admittance is called
the
 A.  surge impedance of the line
 [Correct Answer]
 B.  conductance of the line
 [Wrong Answer]
 C.  regulation of the line
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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Q87. Which of the following D.C. distribution
system is the simplest and lowest
in first cost, ?
 A.  Radial system
 [Correct Answer]
 B.  Ring system
 [Wrong Answer]
 C.  Inter-connected system
 [Wrong Answer]
 D.  None of the above
 [Wrong Answer]
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Q88. High voltage transmission lines use
 A.  suspension insulators
 [Correct Answer]
 B.  pin insulators
 [Wrong Answer]
 C.  both (a) and (b)
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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Q89. Transmission line insulators are made
of
 A.  glass
 [Wrong Answer]
 B.  porcelain
 [Correct Answer]
 C.  iron
 [Wrong Answer]
 D.  P.V.C.
 [Wrong Answer]
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Q90. As compared to a 2-wire D.C. distributor,
a 3-wire distributor with same maximum
voltage to earth uses only
 A.  31.25 percent of copper
 [Correct Answer]
 B.  33.3 percent of copper
 [Wrong Answer]
 C.  66.7 percent of copper
 [Wrong Answer]
 D.  125 percent of copper
 [Wrong Answer]
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QUIZ OF DAY-09/02/2017 GK & CURRENT AFFAIRS
ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 8

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