Electrical Engineering MCQs

Page No. 315

310 km line is considered as_______________?


aa long line


ba medium line


ca short line


dany of the above


View Answer a long line

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


aresistance : ohm


b Inductance


c Capacitance


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


bShape of the conductor


cSurface condition of the conductor


dAll of the above


View Answer All of the above

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


a40—50 meters


b60—100 meters


c 80—100 meters


d300—500 meters


View Answer 80—100 meters

Galvanised steel wire is generally used as______________?


astay wire


b earth wire


cstructural components


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


bAluminium


cSteel


dTungsten


View Answer Tungsten

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


afrom 2 to 5 years


b10 to 15 years


c25 to 30 years


d60 to 70 years


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


bOhm’s law


cKirchhoffs law


dFaraday’s law


View Answer Kelvin’s law

Overhead system can be designed for operation up to____________?


a11 kV


b33 kV


c 66 kV


d400 kV


View Answer 400 kV

The underground system cannot be operated above_________________?


a440 V


b11 kV


c33 kV


d66 kV


View Answer 66 kV

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