ONLINE MCQ EE-TRANSFORMER PART EIGHT

[1] In a transformer the energy is conveyed from primary to secondary?
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

[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  

[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  

[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

ONLINE MCQ EE-TRANSFORMER PART NINE
ONLINE MCQ EE-TRANSFORMER PART SEVEN

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