Short circuit test on transformers is conducted to determine____________?

Related Mcqs:

1. Open circuit test on transformers is conducted to determine____________?

   A. hysteresis losses
   B. copper losses
   C. core losses
   D. eddy current losses

2. Sumpner’s test is conducted on transformers to determine_____________?

   A. temperature
   B. stray losses
   C. all-day efficiency
   D. none of the above

3. While conducting short-circuit test on a transformer the following side is short circuited?

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

4. Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in____________?

   A. short-circuiting of the secondaries
   B. power factor of one of the transformers is leading while that of the other lagging
   C. transformers having higher copper losses will have negligible core losses
   D. loading of the transformers not in proportion to their kVA ratings

5. An open-circuit test on a transformer is conducted primarily to measure______________?

   A. insulation resistance
   B. copper loss
   C. core loss
   D. total loss
   E. efficiency
   F. none of the above

6. During short circuit test iron losses are negligible because of _____________?

   A. the current on secondary side is negligible
   B. the voltage on secondary side does not vary
   C. the voltage applied on primary side is low
   D. full-load current is not supplied to the transformer

7. Which of the following is not a routine test on transformers ?

   A. Core insulation voltage test
   B. Impedance test
   C. Radio interference test
   D. Polarity test

8. If the percentage impedances of the two transformers working in parallel are different, then______________________?

   A. transformers will be overheated
   B. power factors of both the transformers will be same
   C. parallel operation will be not possible
   D. parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load

9. N atural air coo ling is generally restricted for transformers up to__________?

   A. 1.5 MVA
   B. 5 MVA
   C. 15 MVA
   D. 50 MVA

10. Which of the following protection is normally not provided on small distribution transformers ?

    A. Overfluxing protection
    B. Buchholz relay
    C. Overcurrent protection
    D. All of the above