Cables MCQs

1.Where does the highest voltage stress occur within a cable?

2.How does the insulation of a cable change when the length of the insulation is increased?

It decreases as the insulation length becomes longerIt increases when the insulation length is shortenedIt changes with either an increase or decrease in insulation lengthThere is no change in insulation with length variation

3.For a cable intended to operate at 1000 kV, which type of insulation is most suitable?

4.What is a key benefit of using cables instead of overhead transmission lines?

Simplified upkeepMore economicalSuitable for densely populated locationsApplicable for high voltage systems

5.What does capacitance grading in cables refer to?

Utilizing dielectrics with varying permittivity valuesClassifying cables based on their capacitance per kilometerEmploying a single dielectric material in varying proportionsIntroducing capacitance at intervals to offset inductance effectsNone of the mentioned choices

6.Which types of losses occur in a cable conducting alternating current?

Only hysteresis lossesBoth hysteresis and leakage losses exclusivelyHysteresis, leakage, and copper losses combinedHysteresis, leakage, copper, and friction losses all together

7.Where is the electrostatic stress highest in underground cables?

Equal at both the conductor and the outer sheathLowest near the conductor and highest near the sheathGreatest at the conductor and lowest at the sheathZero at both the conductor and the sheathNone of these options

8.Why are underground cables installed at a considerable depth?

To reduce thermal stress on the cablesTo prevent cables from being exposed due to soil displacementTo lessen the impact of shocks and vibrations caused by passing vehiclesFor all the reasons mentioned above

9.What is the typical thickness of metal shielding used on cables?

10.Which factors influence the breakdown voltage of a cable?

Moisture content within the cableOperating temperature of the cableDuration for which voltage is appliedAll the factors mentioned above

11.What is the primary benefit of using oil-filled cables?

Improved impregnation qualityReduced overall dimensionsElimination of ionization, oxidation, and void developmentAll the above advantages

12.In cable manufacturing, copper is typically utilized in which form as a conductor?

13.What type of insulation is always used for cables in 220 kV power lines?

14.What is the minimum separation distance required between a power cable and a communication cable running side by side to prevent interference?

2 centimeters10 centimeters50 centimeters400 centimeters

Cables MCQs

About this subject

1.Where does the highest voltage stress occur within a cable?

2.How does the insulation of a cable change when the length of the insulation is increased?

3.For a cable intended to operate at 1000 kV, which type of insulation is most suitable?

4.What is a key benefit of using cables instead of overhead transmission lines?

5.What does capacitance grading in cables refer to?

6.Which types of losses occur in a cable conducting alternating current?

7.Where is the electrostatic stress highest in underground cables?

8.Why are underground cables installed at a considerable depth?

9.What is the typical thickness of metal shielding used on cables?

10.Which factors influence the breakdown voltage of a cable?

11.What is the primary benefit of using oil-filled cables?

12.In cable manufacturing, copper is typically utilized in which form as a conductor?

13.What type of insulation is always used for cables in 220 kV power lines?

14.What is the minimum separation distance required between a power cable and a communication cable running side by side to prevent interference?

15.What characteristics are essential for an effective insulating material?

16.What is the main drawback of using paper as an insulating material?

17.Is rubber the most frequently used material for insulating cables?

18.Is a uniform dielectric material employed in capacitance grading?

19.Is natural rubber extracted from the latex of tropical trees?

20.Does polyethylene exhibit poor dielectric strength and inferior aging characteristics?

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