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MCQs

Total Questions : 164 | Page 7 of 17 pages
Question 61. Dielectric strength of rubber is around
  1.    30 kV/mm
  2.    5 kV/mm
  3.    25 kV/mm
  4.    15 kV/mm
 Discuss Question
Answer: Option A. -> 30 kV/mm
Question 62. The insulating material for a cable should have
  1.    High dielectric strength
  2.    low cost
  3.    All of the listed here
  4.    High mechanical strength
 Discuss Question
Answer: Option C. -> All of the listed here
Question 63. The material for armouring on cable is usually
  1.    Steel tape
  2.    Galvanized steel wire
  3.    None of the listed here
  4.    Both Steel tape and Galvanized steel wire
 Discuss Question
Answer: Option D. -> Both Steel tape and Galvanized steel wire
Question 64. In single core cables armouring is not done to
  1.    Avoid excessive sheath losses
  2.    Either of the listed here
  3.    None of the listed here
  4.    Make it flexible
 Discuss Question
Answer: Option A. -> Avoid excessive sheath losses
Question 65. The insulating material for cables should
  1.    All of the listed here
  2.    Be non-hygroscopic
  3.    Be non-inflammable
  4.    Be acid proof
 Discuss Question
Answer: Option A. -> All of the listed here
Question 66. In capacitance grading of cables we use a _________ dielectric.
  1.    Hygroscopic
  2.    Homogeneous
  3.    Composite
  4.    Porous
 Discuss Question
Answer: Option C. -> Composite
Question 67. In the cables, sheaths are used to
  1.    Prevent the moisture from entering the cable
  2.    Provide proper insulation
  3.    Provide enough strength
  4.    None of the listed here
 Discuss Question
Answer: Option A. -> Prevent the moisture from entering the cable
Question 68. In a cable immediately above metallic sheath ________ is provided.
  1.    None of the listed here
  2.    Earthing connection
  3.    Armouring
  4.    Bedding
 Discuss Question
Answer: Option D. -> Bedding
Question 69. Which of the following protects a cable against mechanical injury?
  1.    Sheath
  2.    Bedding
  3.    None of the listed here
  4.    Armouring
 Discuss Question
Answer: Option D. -> Armouring
Question 70. In a cable the voltage stress is maximum at
  1.    Sheath
  2.    Core of the conductor
  3.    Insulator
  4.    Surface of the conductor
 Discuss Question
Answer: Option B. -> Core of the conductor

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