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.Management Sciences
Category: Electrical Engineering Mcqs
In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when_______________?
A. there is no load on|he generator
B. the generator runs on full load
C. the generator runs on overload
D. the generator runs on designed speed
Which of the following motor has the poorest speed regulation ?
A. Shunt motor
B. Series motor
C. Differential compound motor
D. Cumulative compound motor
In the transformer following winding has got more cross-sectional area______________?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding
For handling greater currents induction wattmeters are used in conjunction with______________?
A. potential transformers
B. current transformers
C. power transformers
D. either of the above
E. none of the above
A material which is slightly repelled by a magnetic field is known as_____________?
A. ferromagnetic material
B. diamagnetic material
C. paramagnetic material
D. conducting material
Thermonic emission occurs in______________?
A. vacuum tubes
B. copper conductors
C. ferrite cores
D. transistors
A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ______________?
A. the voltage gain will increase
B. the transconductance will increase
C. the voltage gain will decrease
D. the Q-point will shift
For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?
A. voltage of the incoming generator should be same as that of bus bar
B. polarity of incoming generator should be same as that of bus bar
C. all the series fields should be run in parallel by means of equilizer connection
D. series fields of all generators should be either on positive side or negative side of the armature
E. all conditions mentioned above should be satisfied
On overcharging a battery____________?
A. it will bring about chemical change in active materials
B. it will increase the capacity of the battery
C. it will raise the specific gravity of the electrolyte
D. none of the above will occur
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