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MCQs

Total Questions : 222 | Page 6 of 23 pages
Question 51. Aluminium has a specific gravity of
  1.    1.5
  2.    2.7
  3.    4.2
  4.    7.8
 Discuss Question
Answer: Option B. -> 2.7
Question 52. In AC.S.R. Conductors, the insulation between aluminium and steel conductors is
  1.    Insulin
  2.    Bitumen
  3.    Varnish
  4.    No insulation is required
 Discuss Question
Answer: Option D. -> No insulation is required
Question 53. A uniformly loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
  1.    One-fourth
  2.    One-third
  3.    One-half
  4.    Twice
 Discuss Question
Answer: Option A. -> One-fourth
Question 54. The current drawn by the line due to corona losses is
  1.    Non-sinusoidal
  2.    Sinusoidal
  3.    Triangular
  4.    Square
 Discuss Question
Answer: Option A. -> Non-sinusoidal
Question 55. Are the conductors, which connect the consumer's terminals to the distribution
  1.    Distributors
  2.    Service mains
  3.    Feeders
  4.    None of the above
 Discuss Question
Answer: Option B. -> Service mains
Question 56. Which of the following are the constants of the transmission lines?
  1.    Resistance
  2.    Inductance
  3.    Capacitance
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 57. Which of the following materials is used for overhead transmission lines?
  1.    Steel cored aluminium
  2.    Galvanised steel
  3.    Cadmium copper
  4.    Any of the above
 Discuss Question
Answer: Option D. -> Any of the above
Question 58. Which of the following relays is used on long transmission lines?
  1.    Impedance relay
  2.    Mho's relay
  3.    Reactance relay
  4.    None of the above
 Discuss Question
Answer: Option B. -> Mho's relay
Question 59. The minimum clearance between the ground and a 220 kV line is about
  1.    4.3 m
  2.    5.5 m
  3.    7.0 m
  4.    10.5 m
 Discuss Question
Answer: Option C. -> 7.0 m
Question 60. Which of the following methods is used for laying of underground cables?
  1.    Direct laying
  2.    Draw-in-system
  3.    Solid system
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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