Electrical Engineering MCQs

Page No. 314

A booster is a_________________?


a series wound generator

✓


bshunt wound generator

✖


c synchronous generator

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dnone of the above

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Which of the following D.C. distribution system is the simplest and lowest in first cost ?


aRadial system

✓


bRing system

✖


c Inter-connected system

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dNone of the above

✖


View Answer Radial system

Due to which of the following reasons the cables should not be operated too hot ?


aThe oil may loose its viscosity and it may start drawing off from higher levels

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bExpansion of the oil may cause the sheath to burst

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c The thermal instability may rise due to the rapid increase of dielectric losses with temperature

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d All of the above

✓


View Answer All of the above

Which of the following methods is used for laying of underground cables ?


aDirect laying

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bDraw-in-system

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cSolid system

✖


dAll of the above

✓


View Answer All of the above

The operating voltage of extra high tension cables is upto_______________?


a6.6 kV

✖


b11 kV

✖


c33 kV

✖


d66 kV

✓


View Answer 66 kV

The operating voltage of supertension cables is up to_________________?


a 3.3 kV

✖


b6.6 kV

✖


c11 kV

✖


d 33 kV

✓


View Answer 33 kV

The operating voltage of high voltage cables is up to_______________?


al.lkV

✖


b 3.3kV

✖


c6.6kV

✖


dllkV

✓


View Answer llkV

Which of the following is the demerit of a ‘constant voltage transmission system’ ?


aIncrease of short-circuit current of the system

✓


bAvailability of steady voltage at all loads at the line terminals

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cPossibility of better protection for the line due to possible use of higher terminal reactants

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dPossibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

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The square root of the ratio of line impedance and shunt admittance is called the___________?


asurge impedance of the line

✓


bconductance of the line

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cregulation of the line

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dnone of the above

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The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the________________?


a Seeback effect

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bFerranti effect

✓


c Raman effect

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d none of the above

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View Answer Ferranti effect

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