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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: Which of the following does not change in a transformer ?
- Current
- Voltage
- Frequency
- All of the above
C
MCQ: In a transformer the energy is conveyed from primary to secondary_________?
- through cooling coil
- through air
- by the flux
- none of the above
C
MCQ: A transformer core is laminated to__________?
- reduce hysteresis loss
- reduce eddy current losses
- reduce copper losses
- reduce all above losses
B
MCQ: The degree of mechanical vibrations produced by the laminations of a transformer depends on____________?
- tightness of clamping
- gauge of laminations
- size of laminations
- all of the above
D
MCQ: The no-load current drawn by transformer is usually what per cent of the full-load current ?
- 0.2 to 0.5 per cent
- 2 to 5 per cent
- 12 to 15 per cent
- 20 to 30 per cent
B
MCQ: The path of a magnetic flux in a transformer should have______________?
- high resistance
- high reluctance
- low resistance
- low reluctance
D
MCQ: No-load on a transformer is carried out to determine______________?
- copper loss
- magnetising current
- magnetising current and loss
- efficiency of the transformer
C
MCQ: The dielectric strength of transformer oil is expected to be______________?
- lkV
- 33 kV
- 100 kV
- 330 kV
B
MCQ: Sumpner’s test is conducted on transformers to determine_____________?
- temperature
- stray losses
- all-day efficiency
- none of the above
A
MCQ: The permissible flux density in case of cold rolled grain oriented steel is around__________?
- 1.7 Wb/m2
- 2.7 Wb/m2
- 3.7 Wb/m2
- 4.7 Wb/m2
A
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