The insulating material for a cable should have__________?

Related Mcqs:

1. A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become_____________?

   A. one half B. double C. four times D. none of the above...

2. If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?

   A. 2 cm B. 10 cm C. 50 cm D. 400 cm...

3. The insulating material for cables should____________?

   A. be acid proof B. be non-inflammable C. be non-hygroscopic D. have all above properties...

4. 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...

5. The insulating material should have____________?

   A. low permittivity B. high resistivity C. high dielectric strength D. all of the above...

6. 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...

7. The minimum dielectric stress in a cable is at_____________?

   A. armour B. bedding C. conductor surface D. lead sheath...

8. The surge resistance of cable is__________?

   A. 5 ohms B. 20 ohms C. 50 ohms D. 100 ohms...

9. The breakdown of insulation of the cable can be avoided economically by the use of___________?

   A. inter-sheaths B. insulating materials with different dielectric constants C. both (A) and (B) D. none of the above...

10. 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 E. none of the above...