A. minimize the stress
B. avoid the requirement of good insulation
C. provide proper stress distribution
D. none of the above
0
The breakdown of insulation of the cable can be avoided economically by the use of___________?
0
In the cables, sheaths are used to___________?
A. inter-sheaths
B. insulating materials with different dielectric constants
C. both (A) and (B)
D. none of the above
0
If the length of a cable is doubled, its capacitance____________?
A. prevent the moisture from entering the cable
B. provide enough strength
E. provide proper insulation
D. none of the above
0
The metallic sheath may be made of lead or lead alloy or of aluminium ?
A. becomes one-fourth
B. becomes one-half
C. becomes double
D. remains unchanged
0
It is difficult to maintain oil filled cables____________?
A. Yes
B. No
0
In congested areas where excavation is expensive and inconvenient ‘draw in system’ of laying of underground cables is often adopted
A. Yes
B. No
0
Polyethylene has very poor dielectric and ageing properties
A. Yes
B. No
0
Natural rubber is obtained from milky sap of tropical trees
A. Yes
B. No
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