Transformers MCQ

Solve Transformers MCQ ,here given lots of unique mcq for you.It can be very help full for your electrical engineering exam or competitive exams

Transformers MCQ

1. Which does not change in a transformer?

A. Current

B. Voltage

C. Frequency

D. All of the above

2. In transformer, the energy is conveyed from primary to secondary___

A. through the cooling coil

B. through air

C. by the flux

D. none of the above

3. A transformer core is laminated to___

A. reduce hysteresis loss

B. reduce eddy current losses

C. reduce copper losses

D. reduce all above losses

4. A degree of mechanical vibrations produced by laminations of transformer depends on___

A. tightness of clamping

B. gauge of laminations

C. size of laminations

D. all of the above

5. The no-load current drawn by the X`mer is usually what percent of the full load current?

A. 0.2 to 0.5 percent

B. 2 to 5 percent

C. 12 to 15 percent

D. 20 to 30 percent

6. The path of magnetic flux in transformer should have___

A. high resistance

B. high reluctance

C. low resistance

D. low reluctance

7. No-load on transformer is carried out to determine___

A. copper loss

B. magnetizing current

C. magnetizing current and loss

D. efficiency of the transformer

8. Dielectric strength of X`mer oil is required to be___

A. 1 kV

B. 33 kV

C. 100 kV

D. 330 kV

9. Sumner’s test is conducted on transformers to determine___

A. temperature

B. stray losses

C. all-day efficiency

D. none of the above

10. Permissible flux density in cold rolled grain oriented steel is around___

A. 1.7 Wb/m2

B. 2.7 Wb/m2

C. 3.7 Wb/m2

D. 4.7 Wb/m2

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