ONLINE MCQ EE-ELECTRICAL INSTALLATION & WIRING 3

Q21. In the cables, sheaths are used to
 A.  prevent the moisture from entering
the cable
 [Correct Answer]
 B.  provide enough strength
 [Wrong Answer]
 C.  provide proper insulation
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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Q22. The advantage of cables over overhead
transmission lines is
 A.  easy maintenance
 [Wrong Answer]
 B.  low cost
 [Wrong Answer]
 C.  can be used in congested areas
 [Correct Answer]
 D.  can be used in high voltage circuits
 [Wrong Answer]
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Q23. The breakdown voltage of a cable
depends on
 A.  presence of moisture
 [Wrong Answer]
 B.  working temperature
 [Wrong Answer]
 C.  time of application of the voltage
 [Wrong Answer]
 D.  all of the above
 [Correct Answer]
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Q24. The bedding on a cable consists of
 A.  hessian cloth
 [Wrong Answer]
 B.  jute
 [Wrong Answer]
 C.  any of the above
 [Correct Answer]
 D.  none of the above
 [Wrong Answer]
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Q25. Dielectric strength of rubber is around
 A.  5 kV/mm
 [Wrong Answer]
 B.  15 kV/mm
 [Wrong Answer]
 C.  30 kV/mm
 [Correct Answer]
 D.  200 kV/man
 [Wrong Answer]
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Q26. The material for armouring on cable is
usually
 A.  steel tape
 [Wrong Answer]
 B.  galvanised steel wire
 [Wrong Answer]
 C.  any of the above
 [Correct Answer]
 D.  none of the above
 [Wrong Answer]
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Q27. The intersheaths in the cables are used
to
 A.  minimize the stress
 [Wrong Answer]
 B.  avoid the requirement of good insulation
 [Wrong Answer]
 C.  provide proper stress distribution
 [Correct Answer]
 D.  none of the above
 [Wrong Answer]
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Q28. The thickness of metallic shielding on
cables is usually
 A.  0.04 mm
 [Wrong Answer]
 B.  0.2 to 0.4 mm
 [Wrong Answer]
 C.  3 to 5 mm
 [Correct Answer]
 D.  40 to 60 mm
 [Wrong Answer]
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Q29. The insulating material for cables
should
 A.  be acid proof
 [Wrong Answer]
 B.  be non-inflammable
 [Wrong Answer]
 C.  be non-hygroscopic
 [Wrong Answer]
 D.  have all above properties
 [Correct Answer]
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Q30. Low tension cables are generally used
upto
 A.  200 V
 [Wrong Answer]
 B.  500 V
 [Wrong Answer]
 C.  700 V
 [Wrong Answer]
 D.  1000 V
 [Correct Answer]
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ONLINE MCQ EE-ELECTRICAL INSTALLATION & WIRING 4
BSNL TTA(JE) 2016 NEW UPDATE-DOT GIVEN CLEARANCE TO SELECTED CANDIDATES

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