TRANSFORMER PART 8
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Attempt Free TRANSFORMER PART 8 Here. Read The Important Electrical MCQ From Below.
A. Through cooling coil
B. Through air
C. By the flux
D. None of the above
Answer
[2] Which loss is not common between a transformer and rotating machines?
A. Eddy current loss
B. Copper loss
C. Windage loss
D. Hysteresis loss
Answer
TRANSFORMER PART 8
[3] No load test on a transformer is carried out to find
A. Copper loss
B. Magnetising current
C. Magnetising current and loss
D. Efficiency of the transformer
Answer
[4] Sumpner’s test is conducted on transformers to find
A. Temperature
B. Stray losses
C. All-day efficiency
D. None of the above
Answer
[5] The efficiency of a transformer will be maximum when
A. Copper losses = hysteresis losses
B. Hysteresis losses = eddy current losses
C. Eddy current losses = copper losses
D. Copper losses = iron losses
Answer
TRANSFORMER PART 8
[6] The purpose of providing an iron core in a transformer is to
A. Provide support to windings
B. Reduce hysteresis loss
C. Decrease the reluctance of the magnetic path
D. Reduce eddy current losses
Answer
[7] The highest voltage for transmitting electrical power in India is
A. 33kV
B. 66kV
C. 132kV
D. 400kV
Answer
[8] The function of conservator in a transformer is
A. To protect against internal fault
B. To reduce copper as well as core losses
C. To cool the transformer oil
D. To take care of the expansion and contraction of transformer oil due to variation of temperature of surroundings
Answer
TRANSFORMER PART 8
[9] The core used in high frequency transformer is usually
A. Copper core
B. Cost iron core
C. Air core
D. Mid steel core
Answer
[10] Cross over windings are used in
A. Low voltage side of high kVA rating transformers
B. Current transformers
C. High voltage side of high kVA rating transformers
D. High voltage side of low kVA rating transformers
Answer
TRANSFORMER PART 8
