Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?

Related Mcqs:

1. Two generators are running in parallel. One of the generators may run as motor for which of the following reasons ?

   A. The direction of that generator is reversed
   B. The speed of that generator is increased
   C. The field of that generator is weakened
   D. That generator takes large share of loads

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. Shunt generators are most suited for stable parallel operation because of their______________?

   A. rising voltage characteristics
   B. identical voltage characteristics
   C. drooping voltage characteristics
   D. linear voltage characteristics

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. When two D.C. series generators are running in parallel, an equilizer bar is used________________?

   A. to increase the speed and hence generated e.m.f.
   B. to increase the series flux
   C. so that two similar machines will pass approximately equal currents to the load
   D. to reduce the combined effect of ar-mature reaction of both machines

6. When two D.C. generators are running in parallel an equilizer bar is used______________?

   A. to increase the series flux
   B. to increase the generated e.m.f.
   C. to reduce the combined effect of ar-mature reaction of both the machines
   D. so that the two identical machines will pass approximately equal cur¬rents to the load

7. Which of the following generators will be preferred if they are required to be run in parallel?

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

8. 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

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. In D.C. generators, current to the external circuit from armature is given through_____________?

    A. commutator
    B. solid connection
    C. slip rings
    D. none of above