If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?

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. The minimum dielectric stress in a cable is at_____________?

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

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 surge resistance of cable is__________?

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

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

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

9. 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

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

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