PVC stands for____________?

Related Mcqs:

1. The thickness of the layer of insulation on the conductor, in cables, depends upon___________?

   A. reactive power
   B. power factor
   C. voltage
   D. current carrying capacity

2. The bedding on a cable consists of____________?

   A. hessian cloth
   B. jute
   C. any of the above
   D. none of the above

3. Dielectric strength of rubber is around____________?

   A. 5 kV/mm
   B. 15 kV/mm
   C. 30 kV/mm
   D. 200 kV/mm

4. In the cables, the location of fault is usually found out by comparing____________?

   A. the resistance of the conductor
   B. the inductance of conductors
   C. the capacitances of insulated conductors
   D. all above parameters

5. The relative permittivity of rubber is____________?

   A. between 2 and 3
   B. between 5 and 6
   C. between 8 and 10
   D. between 12 and 14

6. Pressure cables are generally not used beyond__________?

   A. 11 kV
   B. 33 kV
   C. 66 kV
   D. 132 kV

7. 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

8. Rubber is most commonly used insulation in cables

   A. Yes
   B. No

9. The advantage of oil filled cables is_________?

   A. more perfect impregnation
   B. smaller overall size
   C. no ionisation, oxidation and formation of voids
   D. all of the above

10. The advantage of cables over overhead transmission lines is___________?

    A. easy maintenance
    B. low cost
    C. can be used in congested areas
    D. can be used in high voltage circuits