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

Related Mcqs:

1. Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?

   A. approximately equal to one B. less than one C. great than one D. none of the above...

2. 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...

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

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

4. 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...

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

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

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

   A. Circular type B. Sandwich type C. Cylindrical type D. Rectangular type...

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. The main reason for generation of harmonics in a transformer could be_______________?

   A. fluctuating load B. poor insulation C. mechanical vibrations D. saturation of core...

9. 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...

10. 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...