The surge resistance of cable is__________?

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. Which of the following protects a cable against mechanical injury___________?

   A. Bedding
   B. Sheath
   C. Armouring
   D. None of the above

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

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

6. 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

7. 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

8. 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

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

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

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

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