Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?

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 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

3. 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

4. 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

5. 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

6. Which of the following insulation is used in cables ?

   A. Varnished cambric
   B. Rubber
   C. Paper
   D. Any of the above

7. 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

8. Rubber is most commonly used insulation in cables

   A. Yes
   B. No

9. In case of three core flexible cable the colour of the neutral is_________?

   A. blue
   B. black
   C. brown
   D. none of the above

10. 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