Constant Voltage Transformers | Electrical Transformers MCQ
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MCQ of Transformers Shape of EMF Generated by delta-connected transformer is not always sinusoidal. which of the following relations is true for magnetic.
- none of the above
- less than one
- approximately equal to one
- great than one
Question 1: Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is ?
Answers: approximately equal to one
- a magnetic component to change voltage level
- none of the above
- an instrument to transform AC current to DC current
- magnetic component to change current level
Question 2: A current transformer is?
Answers: a magnetic component to change voltage level
- none of the above
- both odd and even harmonics in addition to fundamental
- odd harmonics in addition to fundamental
- even harmonics in addition to fundamental
Question 3: While rising and falling if a wave is not symmetrical, it contains?
Answers: even harmonics in addition to fundamental
- Toy transformer
- Variable transformer
- Control transformer
- Isolating transformer
Question 4: What is the typical use of an autotransformer?
Answers: Variable transformer
- delta/star connections
- star/star connections
- delta/delta connections
- star/delta connections
Question 5: Star-star power transformer is protected by current transformer having?
Answers: delta/delta connections
- water
- none of the above
- askarel
- mineral oil
Question 6: Most widely used insulating and cooling transformer liquid is?
Answers: mineral oil
- none of the above
- the output voltage
- the output current
- the output power
Question 7: A transformer, as compared to an amplifier, cannot increase?
Answers: the output voltage
- lagging
- unity
- leading
- 0.8
Question 8: ln a transformer minimum voltage regulation occurs when the power factor of the load is?
Answers: leading
- high voltage winding of small rating transformers
- none of these
- low voltage winding of small rating transformers
- high voltage winding of large rating transformers
Question 9: Cross-over windings are used for?
Answers: high voltage winding of small rating transformers
- 132 kV
- none of the above
- 400 kV
- 11 kV
Question 10: Simple porcelain bushings are used for transformers upto?
Answers: 11 kV
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Correct: 0 Wrong: 0
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