Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-PowerMCQ-Illumination

MCQ of Transformer page-11


≪ Previous Next ≫

1. In a transformer, the magnetic coupling between the primary and secondary circuit can be increased by

A) using transformer oil of better quality
B) using the magnetic core of low reluctance
C) using soft material for winding
D) increasing the number of turns.

Ans : (B)

2. If flux density in the core of a transformer is increased

A) eddy current losses will reduce
B) frequency on secondary winding will change
C) wave shape on secondary side will be distorted
D) size of the transformer can be reduced.

Ans : (D)

3. Which of the following is minimized by laminating the core of a transformer ?

A) Eddy current loss
B) Heat loss
C) Hysteresis loss
D) All of the above.

Ans : (A)

4. The function of breather in a transformer is

A) To filter the transformer oil
B) To arrest flow of moisture when outside air enters the transformer
C) To provide cooling air
D) To provide oxygen to the cooling oil.

Ans : (B)

5. Iron loss in a transformer occurs in

A) main body
B) insulating oil
C) winding
D) core.

Ans : (D)

6. Which loss in a transformer varies significantly with load ?

A) Core loss
B) Copper loss
C) Eddy current loss
D) Hysteresis loss.

Ans : (B)

7. The basic function of a transformer is to change

A) The frequency
B) The power factor
C) The power level
D) The level of voltage.

Ans : (D)

8. Under no load conditions, which of the following loss is negligible ?

A) Copper loss
B) Eddy current loss
C) Hysteresis loss
D) All losses have same magnitude.

Ans : (A)

9. Open circuit test of a transformer gives

A) eddy current loss
B) sum of hysteresis and eddy current loss
C) hysteresis loss
D) copper loss.

Ans : (B)

10. Copper loss in a transformer occurs in

A) bushings
B) main body
C) winding
D) core.

Ans: (C)


≪ Previous Next ≫


Related topics :