A D.C. generator can be considered as____________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. In a D.C. generator the critical resistance refers to the resistance of_____________?

   A. brushes
   B. field
   C. armature
   D. load

6. Magnetic field in a D.C. generator is produced by_______________?

   A. electromagnets
   B. permanent magnets
   C. both A. and B.
   D. none of the above

7. In over compounded generator, full load terminal voltage is______________?

   A. almost zero
   B. less than no load terminal voltage
   C. more than no load terminal voltage
   D. equal to no-load terminal voltage

8. A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly_______________?

   A. 150 V
   B. 175 V
   C. 240 V
   D. 290 V

9. In a D.C. generator the critical resistance can be increased by_____________?

   A. increasing its field resistance
   B. decreasing its field resistance
   C. increasing its speed
   D. decreasing its speed

10. A shunt generator can self-excite:_________________?

    A. only if the resistance of the field circuit is less than critical value
    B. only if the resistance of the field circuit is greater than critical value
    C. irrespective of the value of the resistance in the field circuit
    D. none