The bedding on a cable consists of____________?

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 a cable should have__________?

   A. low cost
   B. high dielectric strength
   C. high mechanical strength
   D. all of the above

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

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

5. The surge resistance of cable is__________?

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

6. 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

7. If the length of a cable is doubled, its capacitance____________?

   A. becomes one-fourth
   B. becomes one-half
   C. becomes double
   D. remains unchanged

8. The breakdown voltage of a cable depends on_____________?

   A. presence of moisture
   B. working temperature
   C. time of application of the voltage
   D. all of the above

9. 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

10. The insulation of the cable decreases with__________?

    A. the increase in length of the insulation
    B. the decrease in the length of the insulation
    C. either A. or (b)
    D. none of the above