Which type of winding is used in 3 phase shell-type transformer?

Related Mcqs:

1. Which of the following is the main advantage of an auto-transformer over a two winding transformer?

   A. Hysteresis losses are reduced
   B. Saving in winding material
   C. Copper losses are negligible
   D. Eddy losses are totally eliminated

2. A shell-type transformer has_________?

   A. high eddy current losses
   B. reduced magnetic leakage
   C. negligibly hysteresis losses
   D. none of the above

3. In the transformer following winding has got more cross-sectional area______________?

   A. Low voltage winding
   B. High voltage winding
   C. Primary winding
   D. Secondary winding

4. Which winding in a transformer has more number of turns ?

   A. Low voltage winding
   B. High voltage winding
   C. Primary winding
   D. Secondary winding

5. If R2 is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be___________?

   A. R2/VK
   B. R2IK2
   C. R22!K2
   D. R22/K

6. Which winding of the transformer has less cross-sectional area?

   A. Primary winding
   B. Secondary winding
   C. Low voltage winding
   D. High voltage winding

7. The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?

   A. Conservator
   B. Breather
   C. Bushings
   D. Buchholz relay

8. Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect?

   A. Its secondary current is 5 A
   B. Its secondary voltage is 400 V
   C. Its rating is 2 kVA
   D. Its secondary current is 20 A
   E. It is a step-up transformer

9. Primary winding of a transformer________________?

   A. is always a low voltage winding
   B. is always a high voltage winding
   C. could either be a low voltage or high voltage winding
   D. none of the above

10. The secondary winding of which of the following transformers is always kept closed?

    A. Step-up transformer
    B. Step-down transformer
    C. Potential transformer
    D. Current transformer