The material commonly used for sheaths of underground cables is______________?

Related Mcqs:

1. The material commonly used for insulation in high voltage cables is_______________?

   A. lead
   B. paper
   C. rubber
   D. none of the above

2. Which of the following methods is used for laying of underground cables ?

   A. Direct laying
   B. Draw-in-system
   C. Solid system
   D. All of the above

3. The material generally used for armour of high voltage cables is_____________?

   A. aluminium
   B. steel
   C. brass
   D. copper

4. The operating voltage of high voltage cables is up to_______________?

   A. l.lkV
   B. 3.3kV
   C. 6.6kV
   D. llkV

5. The operating voltage of supertension cables is up to_________________?

   A. 3.3 kV
   B. 6.6 kV
   C. 11 kV
   D. 33 kV

6. The operating voltage of extra high tension cables is upto_______________?

   A. 6.6 kV
   B. 11 kV
   C. 33 kV
   D. 66 kV
   E. 132 kV

7. Multicore cables generally use________________?

   A. square conductors
   B. circular conductors
   C. rectangular conductors
   D. sector-shaped conductors
   E. none of the above

8. The underground system cannot be operated above_________________?

   A. 440 V
   B. 11 kV
   C. 33 kV
   D. 66 kV

9. A 3-phase 4 wire system is commonly used on________________?

   A. primary transmission
   B. secondary transmission
   C. primary distribution
   D. secondary distribution

10. A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is______________?

    A. one-fourth
    B. one-third
    C. one-half
    D. twice
    E. none of the above