Electrical Cables(Engineering > Electrical Engineering ) Questions and Answers

Question 1. The bedding on a cable consists of
  1.    Hessian cloth
  2.    Jute
  3.    Any of the above
  4.    None of the above
Explanation:-
Answer: Option C. -> Any of the above
Question 2. The insulating material for a cable should have
  1.    Low cost
  2.    High dielectric strength
  3.    High mechanical strength
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Question 3. Underground cables are laid at sufficient depth
  1.    To minimize temperature stresses
  2.    To avoid being unearthed easily due to removal of soil
  3.    To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
  4.    For all of the above reasons
Explanation:-
Answer: Option C. -> To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
Question 4. In capacitance grading a homogeneous dielectric is used.
  1.    Yes
  2.    No
Explanation:-
Answer: Option B. -> No
Question 5. Dielectric strength of rubber is around
  1.    5 kV/mm
  2.    15 kV/mm
  3.    30 kV/mm
  4.    200 kV/mm
Explanation:-
Answer: Option C. -> 30 kV/mm
Question 6. The material for armouring on cable is usually
  1.    Steel tape
  2.    Galvanized steel wire
  3.    Any of the above
  4.    None of the above
Explanation:-
Answer: Option C. -> Any of the above
Question 7. In the cables, sheaths are used to
  1.    Prevent the moisture from entering the cable
  2.    Provide enough strength
  3.    Provide proper insulation
  4.    None of the above
Explanation:-
Answer: Option A. -> Prevent the moisture from entering the cable
Question 8. In a cable immediately above metallic sheath ________ is provided.
  1.    Earthing connection
  2.    Bedding
  3.    Armouring
  4.    None of the above
Explanation:-
Answer: Option B. -> Bedding
Question 9. In capacitance grading of cables we use a _________ dielectric.
  1.    Composite
  2.    Porous
  3.    Homogeneous
  4.    Hygroscopic
Explanation:-
Answer: Option A. -> Composite
Question 10. The insulating material for cables should
  1.    Be acid proof
  2.    Be non-inflammable
  3.    Be non-hygroscopic
  4.    Have all above properties
Explanation:-
Answer: Option D. -> Have all above properties
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