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MCQs

Total Questions : 164 | Page 2 of 17 pages
Question 11. Pressure cables are generally not used beyond
  1.    11 kV
  2.    33 kV
  3.    66 kV
  4.    132 kV
 Discuss Question
Answer: Option C. -> 66 kV
Question 12. Solid type cables are considered unreliable beyond 66 kV because
  1.    Insulation may melt due to higher temperature
  2.    Skin effect dominates on the conductor
  3.    Of corona loss between conductor and sheath material
  4.    There is a danger of breakdown of insulation due to the presence of voids
 Discuss Question
Answer: Option D. -> There is a danger of breakdown of insulation due to the presence of voids
Question 13. The insulation of the cable decreases with
  1.    The increase in length of the insulation
  2.    The decrease in the length of the insulation
  3.    Either (A) or (B)
  4.    None of the above
 Discuss Question
Answer: Option A. -> The increase in length of the insulation
Question 14. The thickness of the layer of insulation on the conductor, in cables, depends upon
  1.    Reactive power
  2.    Power factor
  3.    Voltage
  4.    Current carrying capacity
 Discuss Question
Answer: Option C. -> Voltage
Question 15. Polyethylene has very poor dielectric and ageing properties.
  1.    Yes
  2.    No
 Discuss Question
Answer: Option B. -> No
Question 16. The inters heaths in the cables are used to
  1.    Minimize the stress
  2.    Avoid the requirement of good insulation
  3.    Provide proper stress distribution
  4.    None of the above
 Discuss Question
Answer: Option C. -> Provide proper stress distribution
Question 17. Conduit pipes are normally used to protect ________ cables.
  1.    Unsheathed cables
  2.    Armoured
  3.    PVC sheathed cables
  4.    All of the above
 Discuss Question
Answer: Option A. -> Unsheathed cables
Question 18. _________ cables are used for 132 kV lines.
  1.    High tension
  2.    Super tension
  3.    Extra high tension
  4.    Extra super voltage
 Discuss Question
Answer: Option D. -> Extra super voltage
Question 19. Empire tape is
  1.    Varnished cambric
  2.    Vulcanized rubber
  3.    Impregnated paper
  4.    None of the above
 Discuss Question
Answer: Option A. -> Varnished cambric
Question 20. If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be
  1.    2 cm
  2.    10 cm
  3.    50 cm
  4.    400 cm
 Discuss Question
Answer: Option C. -> 50 cm

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