If residual magnetism of a shunt generator is destroyed accidentally, it may be restored by connecting its shunt field? Mark as favorite Copy Link in reverse to a battery to earth to an alternator Check Answer
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? Mark as favorite Copy Link 2 : 3 3 : 1 3 : 2 1 : 3 Check Answer
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? Mark as favorite Copy Link 150 V 176 V 240 V 290 V Check Answer
When two D.C. series generators are running in parallel, an equilizer bar is used? Mark as favorite Copy Link to increase the speed and hence generated e.m.f. to increase the series flux so that two similar machines will pass approximately equal currents to the load to reduce the combined effect of armature reaction of both machines Check Answer
The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is? Mark as favorite Copy Link 2 4 6 8 Check Answer
For both lap and wave windings, there are as many commutator bars as the number of? Mark as favorite Copy Link slots armature conductors winding elements poles Check Answer
A properly designed D.C. generator can have an overall efficiency of? Mark as favorite Copy Link 60% 80% 95% 100% Check Answer
In D.C. generators, the brushes remain in contact with conductors which? Mark as favorite Copy Link lie under south pole lie under north pole lie in the inter-polar gaps Bone of the above Check Answer
Which generator cannot start if there is no residual magnetism? Mark as favorite Copy Link Series generator Shunt generator Separately excited generator All of the above Check Answer
Shunt generators are most suited for stable parallel operation because of their? Mark as favorite Copy Link rising voltage characteristics identical voltage characteristics drooping voltage characteristics linear voltage characteristics Check Answer