Electrical Engineering MCQs

Page No. 315

310 km line is considered as_______________?


aa long line

✓


ba medium line

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ca short line

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dany of the above

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View Answer a long line

Which of the following are the constants of the transmission lines ?


aresistance : ohm

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b Inductance

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c Capacitance

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d All of the above

✓


View Answer All of the above

The corona is considerably affected by which of the following _______________?


aSize of the conductor

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bShape of the conductor

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cSurface condition of the conductor

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dAll of the above

✓


View Answer All of the above

The usual spans with R.C.C. poles are_______________?


a40—50 meters

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b60—100 meters

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c 80—100 meters

✓


d300—500 meters

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View Answer 80—100 meters

Galvanised steel wire is generally used as______________?


astay wire

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b earth wire

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cstructural components

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dall of the above

✓


View Answer all of the above

Which of the following materials is not used for transmission and distribution of electrical power________________?


aCopper

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bAluminium

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cSteel

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dTungsten

✓


View Answer Tungsten

The wooden poles well impregnated with creosite oil or any preservative compound have life_____________?


afrom 2 to 5 years

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b10 to 15 years

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c25 to 30 years

✓


d60 to 70 years

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View Answer 25 to 30 years

If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?


aKelvin’s law

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bOhm’s law

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cKirchhoffs law

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dFaraday’s law

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View Answer Kelvin’s law

Overhead system can be designed for operation up to____________?


a11 kV

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b33 kV

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c 66 kV

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d400 kV

✓


View Answer 400 kV

The underground system cannot be operated above_________________?


a440 V

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b11 kV

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c33 kV

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d66 kV

✓


View Answer 66 kV

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