1-A d.c. shunt motor is running with certain load. The effect of adding an external resistance field circuit is to a)-reduce the motor speed, b)-increase the motor speed, c)- stop the motor d)- reduce the armature current of the motor 2- The copper loss and iron loss of transformer at half load are 1600 w and 5000w respectively. The copper loss and iron loss at full load will be respectively. a)-(3200 w and 10000w), b)- (6400 w and 5000 w), c)- (6400 w and 10000w), d)-(3200 w and 1250w) 3- The secondary winding of which of the following transformer is always kept close a)-power transformer d)-distribution transformer b)- auto-transformer, c)- current transformer,
1-A d.c. shunt motor is running with certain load. The effect of adding an external resistance field circuit is to a)-reduce the motor speed, b)-increase the motor speed, c)- stop the motor d)- reduce the armature current of the motor 2- The copper loss and iron loss of transformer at half load are 1600 w and 5000w respectively. The copper loss and iron loss at full load will be respectively. a)-(3200 w and 10000w), b)- (6400 w and 5000 w), c)- (6400 w and 10000w), d)-(3200 w and 1250w) 3- The secondary winding of which of the following transformer is always kept close a)-power transformer d)-distribution transformer b)- auto-transformer, c)- current transformer,
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...
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