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
Interpole flux should be sufficient to_____________?
(A) neutralise the commutating self induced e.m.f.
(B) neutralise the armature reaction flux
(C) neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil
(D) perform none of the above functions
Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?
(A) series generator
(B) shunt generator
(C) compound generator
(D) self-excited generator
An exciter for a turbo generator is a_____________?
(A) separately excited generator
(B) shunt generator
(C) series generator
(D) compound generator
D.C. series generator is used_________________?
(A) to supply traction load
(B) to supply industrial load at constant voltage
(C) voltage at the toad end of the feeder
(D) for none of the above purpose
In a D.C. generator in case the resistance of the field winding is increased, then output voltage will____________?
(A) increase
(B) decrease
(C) remain unaffected
(D) fluctuate heavily
For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?
(A) voltage of the incoming generator should be same as that of bus bar
(B) polarity of incoming generator should be same as that of bus bar
(C) all the series fields should be run in parallel by means of equilizer connection
(D) series fields of all generators should be either on positive side or negative side of the armature
(D) all conditions mentioned above should be satisfied
Lap winding is composed of_____________?
(A) any even number of conductors
(B) any odd number of conductors
(C) that even number which is exact multiple of poles + 2
(D) that even number which is exact multiple of poles
Satisfactory commutation of D.C. machines requires______________?
(A) brushes should be of proper grade and size
(B) brushes should smoothly run in the holders
(C) smooth, concentric commutator properly undercut
(D) all of the above
In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when_______________?
(A) there is no load on|he generator
(B) the generator runs on full load
(C) the generator runs on overload
(D) the generator runs on designed speed