ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 5


Q41. The purpose of using a booster is to
 A.  increase current
 [Wrong Answer]
 B.  reduce current
 [Wrong Answer]
 C.  reduce voltage drop
 [Wrong Answer]
 D.  compensate for voltage drop
 [Correct Answer]
 E.  none of the above
 [Wrong Answer]
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Q42. Which of the following can be used for
bus-bars ?
 A.  Tubes
 [Wrong Answer]
 B.  Rods
 [Wrong Answer]
 C.  Bars
 [Wrong Answer]
 D.  Any of the above
 [Correct Answer]
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Q43. Conductors for high voltage transmission
lines are suspended from towers
to
 A.  increase clearance from ground
 [Correct Answer]
 B.  reduce clearance from ground
 [Wrong Answer]
 C.  take care of extension in length
during summer
 [Wrong Answer]
 D.  reduce wind and snow loads
 [Wrong Answer]
 E.  none of the above
 [Wrong Answer]
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Q44. The electrostatic stress in underground
cables is
 A.  zero at the conductor as well as on
the sheath
 [Wrong Answer]
 B.  same at the conductor and sheath
 [Wrong Answer]
 C.  minimum at the conductor and
minimum at the sheath
 [Wrong Answer]
 D.  maximum at the conductor and
minimum at the sheath
 [Correct Answer]
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Q45. The charging current in the cables
 A.  leads the voltage by 180°
 [Wrong Answer]
 B.  leads the voltage by 90°
 [Correct Answer]
 C.  lags the voltage by 90°
 [Wrong Answer]
 D.  lags the voltage by 180°
 [Wrong Answer]
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Q46. The underground system cannot be
operated above
 A.  440 V
 [Wrong Answer]
 B.  11 kV
 [Wrong Answer]
 C.  33 kV
 [Wrong Answer]
 D.  66 kV
 [Correct Answer]
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Q47. Which of the following is the source of
heat generation in the cables ?
 A.  Dielectric losses in cable insulation
 [Wrong Answer]
 B.  IR losses in the conductor
 [Wrong Answer]
 C.  Losses in the metallic sheathings
and armourings
 [Wrong Answer]
 D.  All of the above
 [Correct Answer]
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Q48. The distributors for residential areas
are
 A.  single phase
 [Wrong Answer]
 B.  three-phase three wire
 [Wrong Answer]
 C.  three-phase four wire
 [Correct Answer]
 D.  none of the above
 [Wrong Answer]
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Q49. In transmission lines the cross-arms
are made of
 A.  copper
 [Wrong Answer]
 B.  wood
 [Wrong Answer]
 C.  R.C.C.
 [Wrong Answer]
 D.  steel
 [Correct Answer]
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Q50. Transmitted power remaining the
same, if supply voltage of a D.C. 2-wire
feeder is increased 100 percent, saving
in copper is
 A.  25 percent
 [Wrong Answer]
 B.  50 percent
 [Correct Answer]
 C.  75 percent
 [Wrong Answer]
 D.  100 percent
 [Wrong Answer]
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ONLINE MCQ EE-TRANSMISSION AND DISTRIBUTION 6
CURRENT AFFAIRS QUIZ OF DAY-9 February 2017

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