A Transformer transforms____________?

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. 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...

3. Which of the following does not change in a transformer ?

   A. Current B. Voltage C. Frequency D. All of the above...

4. Which of the following is not a part of transformer installation ?

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

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

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

6. In a transformer the resistance between its primary and secondary is____________?

   A. zero B. 1 ohm C. 1000 ohms D. infinite...

7. A transformer can have zero voltage regulation at______________?

   A. leading power factor B. lagging power factor C. unity power factor D. zero power factor...

8. The voltage transformation ratio of a transformer is equal to the ratio of_______________?

   A. primary turns to secondary turns B. secondary current to primary current C. secondary induced e.m.f. to primary induced e.m.f D. secondary terminal voltage to primary applied voltage...

9. A shell-type transformer has_________?

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

10. In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?

    A. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns B. to absorb the line surge voltage and save the winding of transformer from damage C. to reflect the line surge and save the winding of a transformer from damage D. none of the above...