Cables Mcqs
Q.1: In a cable the voltage stress is maximum at____________?8
A. sheath
B. insulator
C. E. surface of the conductor
D. core of the conductor
Q.2: The insulation of the cable decreases with__________?5
A. the increase in length of the insulation(
B. the decrease in the length of the insulation,
C. either or (b)
D. none of the above
Q.3: Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?`
A. Polyvinyle chloride
B. Vulcanised rubber
C. Impregnated paper
D. Compressed SFe gas
Q.4: The advantage of cables over overhead transmission lines is___________?G
A. easy maintenance
B. low cost
C. can be used in congested areas
D. can be used in high voltage circuits$
Q.5: Capacitance grading of cable implies__________?/
A. use of dielectrics of different permeabilities.
B. grading according to capacitance of cables per km length8
C. cables using single dielectric in different concentrations:
D. capacitance required to be introduced at different lengths to counter the effect of inductance^
Q.6: A cable carrying alternating current has__________?3
A. hysteresis losses only
B. hysteresis and leakage losses only"
C. hysteresis, leakage and copper losses only*
D. hysteresis, leakage, copper and friction losses/
Q.7: The electrostatic stress in underground cables is_________?;
A. same at the conductor and the sheath$
B. minimum at the conductor and maximum at the sheath2
C. maximum at the conductor and minimum at the sheath2
D. zero at the conductor as well as on the sheath.
Q.8: If the length of a cable is doubled, its capacitance____________?A
A. becomes one-fourth
B. becomes one-half
C. becomes double
D. remains unchanged
Q.9: In the cables, sheaths are used to___________?.
A. prevent the moisture from entering the cable,
B. provide enough strength
C. E. provide proper insulation
D. none of the above
Q.10: The breakdown of insulation of the cable can be avoided economically by the use of___________?^
A. inter-sheaths
B. insulating materials with different dielectric constants8
C. both (A) and (B)
D. none of the above

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