Electrical Cables(Electrical Engineering ) Questions and answers for exam Preparation

Question 1. The bedding on a cable consists of

Hessian cloth
Jute
Any of the above
None of the above

Explanation:-

Answer: Option C. -> Any of the above

Question 2. Underground cables are laid at sufficient depth

To minimize temperature stresses
To avoid being unearthed easily due to removal of soil
To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
For all of the above reasons

Explanation:-

Answer: Option C. -> To minimize the effect of shocks and vibrations due to gassing vehicles, etc.

Question 3. In capacitance grading a homogeneous dielectric is used.

Yes
No

Explanation:-

Answer: Option B. -> No

Question 4. The insulating material for a cable should have

Low cost
High dielectric strength
High mechanical strength
All of the above

Explanation:-

Answer: Option D. -> All of the above

Question 5. Dielectric strength of rubber is around

5 kV/mm
15 kV/mm
30 kV/mm
200 kV/mm

Explanation:-

Answer: Option C. -> 30 kV/mm

Question 6. Natural rubber is obtained from milky sap of tropical trees.

Yes
No

Explanation:-

Answer: Option A. -> Yes

Question 7. PVC stands for

Polyvinyl chloride
Post varnish conductor
Pressed and varnished cloth
Positive voltage conductor

Explanation:-

Answer: Option A. -> Polyvinyl chloride

Question 8. The advantage of cables over overhead transmission lines is

Easy maintenance
Low cost
Can be used in congested areas
Can be used in high voltage circuits

Explanation:-

Answer: Option C. -> Can be used in congested areas

Question 9. The surge resistance of cable is

5 ohms
20 ohms
50 ohms
100 ohms

Explanation:-

Answer: Option C. -> 50 ohms

Question 10. Cables, generally used beyond 66 kV are

Oil filled
S.L. type
Belted
Armoured

Explanation:-

Answer: Option A. -> Oil filled