The advantage of oil filled cables is_________?
A. More perfect impregnation
B. Smaller overall size
C. No ionisation, oxidation and formation of voids
D. All of the above
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Copper as conductor for cables is used as________?
A. Annealed
B. Hardened and tempered
C. Hard drawn
D. Alloy with chromium
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Cables for 220 kV lines are invariably____________?
A. Mica insulated
B. Paper insulated
C. Compressed oil or compressed gas insulated
D. Rubber insulated
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If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?
A. 2 cm
B. 10 cm
C. 50 cm
D. 400 cm
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The insulating material should have____________?
A. Low permittivity
B. High resistivity
C. High dielectric strength
D. All of the above
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The disadvantage with paper as insulating material is____________?
A. It is hygroscopic
B. It has high capacitance
C. It is an organic material
D. None of the above
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Rubber is most commonly used insulation in cables
A. Yes
B. No
D. None of these
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In capacitance grading a homogeneous dielectric is used
A. Yes
B. No
D. None of these
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Natural rubber is obtained from milky sap of tropical trees
A. Yes
B. No
D. None of these
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Polyethylene has very poor dielectric and ageing properties
A. Yes
B. No
D. None of these
Read more about this MCQ
Word of the Day
12 Sep
Exploit
make full use of and derive benefit from (a resource).
قابل ذکر بنانا، فروغ دینا، کارنامہ، زبردست کامیابی

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