Transformers Mcqs
Transformers Mcqs, this topic has 134 mcqs, It takes five to ten minutes to complete this free Transformers Mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Transformers Mcqs" MCQs and share with your friends, brothers, sisters.
Transformers Mcqs (Total Quiz: 134)
MCQ: The size of a transformer core will depend on__________?
- frequency
- area of the core
- flux density of the core material
- A. and B. both
D
MCQ: The secondary winding of which of the following transformers is always kept closed?
- Step-up transformer
- Step-down transformer
- Potential transformer
- Current transformer
D
MCQ: The function of breather in a transformer is___________?
- to provide oxygen inside the tank
- to cool the coils during reduced load
- to cool the transformer oil
- to arrest flow of moisture when outside air enters the transformer
D
MCQ: The efficiencies of transformers compared with that of electric motors of the same power are____________?
- about the same
- much smaller
- much higher
- somewhat smaller
- none of the above
C
MCQ: The transformer oil should have _______ volatility and _______ viscosity?
- low,low
- high,high
- low,high
- high,low
A
MCQ: In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?
- less than 15 A
- more than 15 A
- 15 A
- none of the above
A
MCQ: For the parallel operation of single phase transformers it is necessary that they should have___________?
- same efficiency
- same polarity
- same kVA rating
- same number of turns on the secondary side
B
MCQ: Minimum voltage regulation occurs when the power factor of the load is_____________?
- unity
- lagging
- leading
- zero
C
MCQ: Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?
- approximately equal to one
- less than one
- great than one
- none of the above
A
MCQ: Short circuit test on transformers is conducted to determine____________?
- hysteresis losses
- copper losses
- core losses
- eddy current losses
B