Electrical Engineering MCQs

Page No. 211

In capacitance grading a homogeneous dielectric is used


aYes

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bNo

✓


cnone of the above

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dNone of these

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View Answer No

Natural rubber is obtained from milky sap of tropical trees


a Yes

✓


b No

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cnone of the above

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dNone of them

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View Answer Yes

Polyethylene has very poor dielectric and ageing properties


aYes

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bNo

✓


cNone of these

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dNone of above

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View Answer No

In congested areas where excavation is expensive and inconvenient ‘draw in system’ of laying of underground cables is often adopted


aYes

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bNo

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cNone of these

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dNone of above

✓


View Answer None of above

It is difficult to maintain oil filled cables____________?


aYes

✓


b No

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cNone of these

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dAll of the above

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View Answer Yes

The metallic sheath may be made of lead or lead alloy or of aluminium ?


aYes

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bNo

✓


cNone of these

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dA & B

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View Answer No

If the length of a cable is doubled, its capacitance____________?


a becomes one-fourth

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bbecomes one-half

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cbecomes double

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dremains unchanged

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View Answer becomes double

In the cables, sheaths are used to___________?


aprevent the moisture from entering the cable

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b provide enough strength

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cprovide proper insulation

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dnone of the above

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The breakdown of insulation of the cable can be avoided economically by the use of___________?


ainter-sheaths

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binsulating materials with different dielectric constants

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cboth (A) and (B)

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dnone of the above

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View Answer both (A) and (B)

The intersheaths in the cables are used to_____________?


aminimize the stress

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bavoid the requirement of good insulation

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cprovide proper stress distribution

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dnone of the above

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