The minimum dielectric stress in a cable is at_____________?

Related Mcqs:

1. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be_______________?

   A. 5 kV/mm
   B. 10 kV/mm
   A. 15 kV/mm
   D. 30 kV/mm

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. 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

4. In a cable, the maximum stress under operating conditions is at___________?

   A. insulation layer
   B. sheath
   C. armour
   D. conductor surface

5. In a cable the voltage stress is maximum at____________?

   A. sheath
   B. insulator
   E. surface of the conductor
   D. core of the conductor

6. Dielectric strength of rubber is around____________?

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

7. In capacitance grading of cables we use a _______ dielectric?

   A. composite
   B. porous
   C. homogeneous
   D. hygroscopic

8. Polyethylene has very poor dielectric and ageing properties

   A. Yes
   B. No

9. In capacitance grading a homogeneous dielectric is used

   A. Yes
   B. No

10. The surge resistance of cable is__________?

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