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MCQs

Total Questions : 141 | Page 7 of 15 pages
Question 61. The application of a megger is _________
  1.    to measure resistance
  2.    to test for leakage
  3.    to limit the current
  4.    to increase the emf of the circuit
 Discuss Question
Answer: Option B. -> to test for leakage
Answer: (b).to test for leakage
Question 62. What is the significance of a megger with respect to high resistance?
  1.    it is used to limit the current
  2.    it is used to provide stability
  3.    used for measuring high resistance with respect to ground
  4.    it is used for temperature protection
 Discuss Question
Answer: Option C. -> used for measuring high resistance with respect to ground
Answer: (c).used for measuring high resistance with respect to ground
Question 63. How is the megger calibrated?
  1.    in steps of 1 unit per division
  2.    based on the value of resistance to be measured
  3.    directly calibrated on the position of the pointer
  4.    reversely calibrated based on the pointer position
 Discuss Question
Answer: Option D. -> reversely calibrated based on the pointer position
Answer: (d).reversely calibrated based on the pointer position
Question 64. What is an earth electrode?
  1.    electrode that is connected to earth
  2.    material used for earthing
  3.    electrode connected to the circuit
  4.    electrode which is connected to the mains
 Discuss Question
Answer: Option B. -> material used for earthing
Answer: (b).material used for earthing
Question 65. What is earthing?
  1.    connecting electrical machines to earth
  2.    providing a connection to the ground
  3.    connecting the electrical machines to source
  4.    providing a source of current
 Discuss Question
Answer: Option A. -> connecting electrical machines to earth
Answer: (a).connecting electrical machines to earth
Question 66. Earth electrode provides ____________
  1.    high resistance
  2.    medium resistance
  3.    low resistance
  4.    very high resistance
 Discuss Question
Answer: Option C. -> low resistance
Answer: (c).low resistance
Question 67. In a three phase system, the neutral is _________
  1.    earthed
  2.    connected to low voltage
  3.    connected to high voltage
  4.    not connected
 Discuss Question
Answer: Option A. -> earthed
Answer: (a).earthed
Question 68. How is the condition of an earth electrode measured?
  1.    by measuring the voltage
  2.    by measuring the current
  3.    by measuring the power
  4.    by measuring resistance
 Discuss Question
Answer: Option D. -> by measuring resistance
Answer: (d).by measuring resistance
Question 69. Earthing is used as return conductor in telephone lines and for traction work.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 70. Earthing does not help in protecting the equipment.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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