Electrical Engineering MCQs

Page No. 209

The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?


aNewton’s law


bFaraday’s law of electromagnetic


c Faraday’s law of electrolysis


dGauss’s law



During charging the specific gravity of the electrolyte of a lead-acid battery


a increases


bdecreases


c remains the same


dbecomes zero


View Answer increases

The active materials of a nickel-iron battery are___________?


a nickel hydroxide


bpowdered iron and its oxide


c21% solution of KOH


d all of the above


View Answer all of the above

In a cable the voltage stress is maximum at____________?


asheath


binsulator


csurface of the conductor


dcore of the conductor


View Answer core of the conductor

The insulation of the cable decreases with__________?


athe increase in length of the insulation


bthe decrease in the length of the insulation


ceither A. or (b)


d none of the above



Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?


aPolyvinyle chloride


bVulcanised rubber


c Impregnated paper


dCompressed SFe gas


View Answer Compressed SFe gas

The advantage of cables over overhead transmission lines is___________?


aeasy maintenance


bLow cost


c can be used in congested areas


dcan be used in high voltage circuits



Capacitance grading of cable implies__________?


ause of dielectrics of different permeabilities


b grading according to capacitance of cables per km length


ccables using single dielectric in different concentrations


d capacitance required to be introduced at different lengths to counter the effect of inductance



A cable carrying alternating current has__________?


ahysteresis losses only


bhysteresis and leakage losses only


chysteresis, leakage and copper losses only


dhysteresis, leakage, copper and friction losses



The electrostatic stress in underground cables is_________?


asame at the conductor and the sheath


bminimum at the conductor and maximum at the sheath


c maximum at the conductor and minimum at the sheath


dzero at the conductor as well as on the sheath



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