Electrical Engineering MCQs

Page No. 211

In capacitance grading a homogeneous dielectric is used


aYes


bNo


cnone of the above


dNone of these


View Answer No

Natural rubber is obtained from milky sap of tropical trees


a Yes


b No


cnone of the above


dNone of them


View Answer Yes

Polyethylene has very poor dielectric and ageing properties


aYes


bNo


cNone of these


dNone of above


View Answer No

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


aYes


bNo


cNone of these


dNone of above


View Answer None of above

It is difficult to maintain oil filled cables____________?


aYes


b No


cNone of these


dAll of the above


View Answer Yes

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


aYes


bNo


cNone of these


dA & B


View Answer No

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


a becomes one-fourth


bbecomes one-half


cbecomes double


dremains unchanged


View Answer becomes double

In the cables, sheaths are used to___________?


aprevent the moisture from entering the cable


b provide enough strength


cprovide proper insulation


dnone of the above



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


ainter-sheaths


binsulating materials with different dielectric constants


cboth (A) and (B)


dnone of the above


View Answer both (A) and (B)

The intersheaths in the cables are used to_____________?


aminimize the stress


bavoid the requirement of good insulation


cprovide proper stress distribution


dnone of the above



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