DC GENERATOR 3
DC Generator Challenge
Test your knowledge on DC generators with our engaging quiz! Covering essential concepts, this quiz is perfect for students and professionals looking to sharpen their understanding of electrical engineering.
Key Features:
- Multiple choice questions on DC generator principles
- Clear explanations for each question
- Perfect for self-assessment and learning
21. The e.m.f., generated by a shunt wound D.C.generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f., generated will be _________.
E/2
2E
Slightly less than E
E
22. Following D.C.generator will be in a position to build up without any residual magnetism In the poles _____________.
Series generator
Shunt generator
Compound generator
Seperately excited generator
23. D.C.generator generally preferred for charging automobile batteries is ______________.
Series generator
Shunt generator
Long shunt compound generator
Any of the above
24. A shunt generator running at 1000r.p.m., has generated e.m.f., as 200volt. If the speed increases to 1200r.p.m., the generated e.m.f., will be nearly ___________.
150V
175V
240V
290V
25. If a D.C.generator fails to build up the voltage, the probable cause could not be _________.
IMPERFECT BRUSH CONTACT
Field resistance less than the critical value resistance
No residual magnetism in the generator
Faulty shunt connections tending to reduce the residual magnetism
26. Flashing the field of D.C.generator means ___________.
Neutralising residual magnetism
Creating residual magnetism by a D.C.source
Making the magnetic losses
increasing the flux density by adding extra turns of windings on poles
27. In a D.C.machine stray loss is the sum of ____________.
Total copper loss and mechanical loss`
Armature copper loss and iron loss
. Shunt field copper loss and mechanical loss
Iron loss and mechanical loss
28. In a D.C.generator in case the resistance of the field winding is increased, then output voltage will _____________.
Increase
Decrease
Remain unaffected
Fluctuate heavily
29. Which of the following generator will have negligible terminal voltage while running on no-load?
Series generator
Shunt generator
Compound generator
Seperately excited generator
30. In any rotating machine that part which houses the conductors and in which e.m.f., induced is to be utilised is called ___________.
Rotor
Stator
Field
Armature
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