A. low permittivity
B. high resistivity
C. high dielectric strength
D. all of the above
Related Mcqs:
- The insulating material for a cable should have__________?
A. low cost
B. high dielectric strength
C. high mechanical strength
D. all of the above - The insulating material for cables should____________?
A. be acid proof
B. be non-inflammable
C. be non-hygroscopic
D. have all above properties - The disadvantage with paper as insulating material is____________?
A. it is hygroscopic
B. it has high capacitance
C. it is an organic material
D. none of the above - The material for armouring on cable is usually__________?
A. steel tape
B. galvanised steel wire
C. any of the above
D. none of the above - Empire tape is__________?
A. varnished cambric
B. vulcanised rubber
C. impregnated paper
D. none of the above - A cable carrying alternating current has__________?
A. hysteresis losses only
B. hysteresis and leakage losses only
C. hysteresis, leakage and copper losses only
D. hysteresis, leakage, copper and friction losses - PVC stands for____________?
A. polyvinyl chloride
B. post varnish conductor
C. pressed and varnished cloth
D. positive voltage conductor
E. none of the above - The metallic sheath may be made of lead or lead alloy or of aluminium ?
A. Yes
B. No - Cables for 220 kV lines are invariably____________?
A. mica insulated
B. paper insulated
C. compressed oil or compressed gas insulated
D. rubber insulated
E. none of the above - The electrostatic stress in underground cables is_________?
A. same at the conductor and the sheath
B. minimum at the conductor and maximum at the sheath
C. maximum at the conductor and minimum at the sheath
D. zero at the conductor as well as on the sheath
E. none of the above
