Sunday, March 3, 2013

Transformers Solved Objective Questions: Part-6

Transformers Objective Questions

[1] A transformer core is laminated to
A. Reduce hysteresis loss
B. Reduce eddy current losses
C. Reduce copper losses
D. Reduce all above losses

[2] While conducting short-circuit test on a transformer the following side is short-circuited
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side

[3] Distribution transformers are generally designed for maximum efficiency around
A. 90% load
B. Zero load
C. 25% load
D. 50% load

[4] A transformer oil must be free from
A. Sludge
B. Odour
C. Gases
D. Moisture

[5] The use of higher flux density in the transformer design
A. Reduces weight per KVA
B. Reduces iron losses
C. Reduces copper losses
D. Increases part load efficiency

[6] In a transformer the toppings are generally provided on
A. Primary side
B. Secondary side
C. Low voltage side
D. High voltage side

[7] Which of the following is not a part of transformer installation?
A. Conservator
B. Breather
C. Buchholz relay
D. Exciter

[8] The path of a magnetic flux in a transformer should have
A. High resistance
B. High reluctance
C. Low resistance
D. Low reluctance

[9] In case there are burrs on the edges of the laminations of the transformer, it is likely to result in
A. Vibrations
B. Noise
C. Higher eddy currents loss
D. Higher hysteresis loss

[10] Silicon steel used in laminations mainly reduces
a. Hysteresis loss
b. Eddy current losses
c. Copper loss
d. All of the above


3:26 PM

8 comments:

  1. ITS VERY USEFUL FOR THE STUDENTS TO INCREASE THE SUBJECT IT'S SIMPLY OSAM

    ReplyDelete
  2. question no 6 ansishigh voltage sider in middle

    ReplyDelete
  3. Bimal *b* 26.06.2014June 25, 2014 at 10:44 PM

    I totally agree with Dushyant G it is done on higher side *b

    ReplyDelete
  4. put the answer
    explanation

    ReplyDelete
  5. Tapping are provided on HV side.

    ReplyDelete
  6. Generally transformer tappings are provided on HV Side....

    ReplyDelete