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MCQs

Total Questions : 117 | Page 8 of 12 pages
Question 71. In a C.T., the primary ampere turns is variable.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 72. High magnetizing forces in the core when removed suddenly lead to ____________
  1.    no residue
  2.    partial residual magnetism
  3.    rupture of the device
  4.    residual magnetism
 Discuss Question
Answer: Option D. -> residual magnetism
Answer: (d).residual magnetism
Question 73. High flux density leads to _________
  1.    a decreased voltage in the secondary
  2.    a decreased voltage in the primary
  3.    a increased voltage in the secondary
  4.    a decreased voltage in the primary
 Discuss Question
Answer: Option C. -> a increased voltage in the secondary
Answer: (c).a increased voltage in the secondary
Question 74. The secondary circuit of a C.T. is open when?
  1.    a very high flux density is produced
  2.    a very low flux density is produced
  3.    a moderate flux density is produced
  4.    no flux density is produced
 Discuss Question
Answer: Option A. -> a very high flux density is produced
Answer: (a).a very high flux density is produced
Question 75. When primary current flows, secondary circuit should be open.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 76. Potential transformer is similar in design to a _________
  1.    C.T.
  2.    Step up transformer
  3.    Power transformer
  4.    Step down transformer
 Discuss Question
Answer: Option C. -> Power transformer
Answer: (c).Power transformer
Question 77. The secondary winding of a P.T. is designed for _________
  1.    220 V
  2.    2.2 kV
  3.    1.1 kV
  4.    110 V
 Discuss Question
Answer: Option D. -> 110 V
Answer: (d).110 V
Question 78. The primary current in a C.T. is _________
  1.    independent of secondary circuit
  2.    dependent on the secondary circuit
  3.    depends on the transformation ratio
  4.    depends on the nominal ratio
 Discuss Question
Answer: Option A. -> independent of secondary circuit
Answer: (a).independent of secondary circuit
Question 79. The excitation current of a C.T. _________
  1.    varies over a fixed range of operation
  2.    varies over a wide range of normal operation
  3.    is fixed over a range of operation
  4.    is fixed always
 Discuss Question
Answer: Option B. -> varies over a wide range of normal operation
Answer: (b).varies over a wide range of normal operation
Question 80. Secondary of a P.T. can be open circuited.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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