A cumulatively compounded long shunt generator when operating as a motor would be____________?

Related Mcqs:

1. 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

2. 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

3. 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

4. The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be____________?

   A. 150 V
   B. less than 150 V
   C. greater than 150 V
   D. none of the above

5. In case of a flat compounded generator:

   A. voltage generated is less than the rated voltage
   B. generated voltage is proportional to the load on the generator
   C. voltage remains constant irrespective of the load
   D. speed varies in proportion to the load on the generator

6. 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

7. In a level compounded D.C. generator, full load terminal voltage is______________?

   A. negligibly low
   B. equal to no-load terminal voltage
   C. more than no-load terminal voltage
   D. less than 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. 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

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