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. The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be_____________?

   A. 640 V
   B. 620 V
   C. 600 V
   D. 580 V

3. The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is______________?

   A. 2
   B. 4
   C. 6
   D. 8

4. The commutator segments are connected to the armature conductors by means of___________?

   A. copper lugs
   B. resistance wires
   C. insulation pads
   D. brazing

5. The resistance of armature winding depends on

   A. length of conductor
   B. cross-sectional area of the conductor
   C. number of conductors
   D. all of the above

6. The following constitute short-circuit in the armature winding.

   A. Insulation failure between two commutator bars
   B. Insulation failure between two turns of a coil
   C. Two of more turns of the same coil getting grounded
   D. All of the above

7. The armature of D.C. generator is laminated to_______________?

   A. reduce the bulk
   B. provide the bulk
   C. insulate the core
   D. reduce eddy current loss

8. The armature core of a D.C. generator is usually made of__________________?

   A. silicon steel
   B. copper
   C. non-ferrous material
   D. cast-iron

9. A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will_____________?

   A. will be zero
   B. will be of 5 Hz
   C. will be of 5 xiVHz
   D. will be of v Hz 5

10. Armature reaction in a generator results in_____________?

    A. demagnetisation of leading pole tip and magnetisation of trailing pole tip
    B. demagnetisation of trailing pole tip and magnetisation of leading pole tip
    C. damagnetising the center of all poles
    D. magnetising the center of all poles