Power System - I (3140914) MCQs

MCQs of Underground Cables

Showing 111 to 112 out of 112 Questions
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111.
The insulation resistance of a single-core cable is 200 MΩ/km. The insulation resistance for 5 km length is
(a) 40 MΩ
(b) 1000 MΩ
(c) 200 MΩ
(d) 8 MΩ
Answer:

Option (a)

112.
In a cable, the sheath radius is R and conductor radius is r. As  R changes from 0.5R to 0.25R, the maximum voltage gradient in dielectric
(a) Decreases by 6%
(b) Increases by 6%
(c) Increases by 15%
(d) Decrease by 15%
Answer:

Option (b)

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