Dielectric Stress in a Single Core Cable - MCQs with Answers

Dielectric Stress in a Single Core Cable - MCQs with Answers

Q1. What is the maximum stress in the insulation for a 33 kV single core cable with a diameter of 1 cm and a sheath of inside diameter 4 cm?

a. 50.61 kV / cm rms
b. 45.231 kV / cm rms
c. 47.61 kV / cm rms
d. 49.231 kV /cm rms

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Q2. What will be the insulation thickness for a conductor of diameter 2 cm, with maximum and minimum stress 40 kV / cm rms and 10 kV / cm rms respectively?

a. 5 cm
b. 3 cm
c. 2 cm
d. 4 cm

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Q3. What will be the most economical value of diameter of a single core cable to be used on 50 kV, single phase system, when the maximum permissible stress is not exceeding 50 kV / cm?

a. 2.52 cm
b. 2.828 cm
c. 3.52 cm
d. 3.82 cm

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Q4. To get a minimum value of stress (g_max) what should be the ratio of core diameter to sheath diameter?

a. 1 / 2.718
b. 2.178
c. 1 / 3.78
d. 3.78

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