A transformer oil must be free from________________?

Related Mcqs:

The dielectric strength of transformer oil is expected to be______________?

A. lkV B. 33 kV C. 100 kV D. 330 kV...

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...

Distribution transformers are generally designed for maximum efficiency around________________?

A. 90% load B. zero load C. 25% load D. 50% load...

If a transformer is continuously operated the maximum temperature rise will occur in_______________?

A. core B. windings C. tank D. any of the above...

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...