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

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bFaraday’s law of electromagnetic

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c Faraday’s law of electrolysis

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dGauss’s law

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


a increases

✓


bdecreases

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c remains the same

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dbecomes zero

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View Answer increases

The active materials of a nickel-iron battery are___________?


a nickel hydroxide

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bpowdered iron and its oxide

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c21% solution of KOH

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d all of the above

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View Answer all of the above

In a cable the voltage stress is maximum at____________?


asheath

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binsulator

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csurface of the conductor

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dcore of the conductor

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View Answer core of the conductor

The insulation of the cable decreases with__________?


athe increase in length of the insulation

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bthe decrease in the length of the insulation

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ceither A. or (b)

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d none of the above

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


aPolyvinyle chloride

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bVulcanised rubber

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c Impregnated paper

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dCompressed SFe gas

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View Answer Compressed SFe gas

The advantage of cables over overhead transmission lines is___________?


aeasy maintenance

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bLow cost

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c can be used in congested areas

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dcan be used in high voltage circuits

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Capacitance grading of cable implies__________?


ause of dielectrics of different permeabilities

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b grading according to capacitance of cables per km length

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ccables using single dielectric in different concentrations

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

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A cable carrying alternating current has__________?


ahysteresis losses only

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bhysteresis and leakage losses only

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chysteresis, leakage and copper losses only

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dhysteresis, leakage, copper and friction losses

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The electrostatic stress in underground cables is_________?


asame at the conductor and the sheath

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bminimum at the conductor and maximum at the sheath

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c maximum at the conductor and minimum at the sheath

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dzero at the conductor as well as on the sheath

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