For generating large currents on D.C. generators which winding is generally preferred? Mark as favorite Copy Link Progressive wave winding Lap winding Retrogressive wave winding Current depends on design Check Answer
With a D.C. generator which of the following regulation is preferred? Mark as favorite Copy Link 100% regulation infinite regulation 50% regulation 1% regulation Check Answer
In D.C. generators, current to the external circuit from armature is given through? Mark as favorite Copy Link commutator solid connection slip rings none of above Check Answer
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