Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?

Related Mcqs:

1. Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?

   A. Series generator B. Shunt generator C. Compound generator D. None of the above...

2. If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be____________?

   A. zero B. small C. the same as rated voltage D. high...

3. Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?

   A. 2 : 3 B. 3 : 1 C. 3 : 2 D. 1 : 3...

4. Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?

   A. Dummy coils B. Commutator C. Eye bolt D. Equilizer rings...

5. The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?

   A. E/2 B. 2E C. slightly less than E D. E...

6. If a D.C. generator fails to build up the probable cause could not be_____________?

   A. imperfect brush contact B. field resistance less than the critical resistance C. no residual magnetism in the generator D. faulty shunt connections tending to reduce the residual magnetism...

7. If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to______________?

   A. reverse the field connections B. increase the field resistance C. increase the speed of primemover D. check armature insulation resistance...

8. A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be_____________?

   A. zero B. about 2 V C. about 50 V D. 220 V...

9. Which of the following generator will have negligible terminal voltage while running on no-load?

   A. Series generator B. Shunt generator C. Compound generator D. Separately excited generator...

10. The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except:_____________?

    A. armature reaction B. armature resistance drop C. field weakening due to armature reaction and armature D. commutation...