DC Generators When two D.C. series generators are running in parallel, an equalizer bar is used To reduce the combined effect of armature reaction of both machines 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 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 ANSWER DOWNLOAD EXAMIANS APP
DC Generators The essential condition for parallel operation of two D.C. generators is that they have The same drooping voltage characteristics Same percentage regulation The same operation r.p.m. Same kW rating The same drooping voltage characteristics Same percentage regulation The same operation r.p.m. Same kW rating ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a wave winding, the commutator pitch is approximately equal to Thrice the pole pitch Twice the pole pitch None of the listed here Pole pitch Thrice the pole pitch Twice the pole pitch None of the listed here Pole pitch ANSWER DOWNLOAD EXAMIANS APP
DC Generators Carbon brushes are used in a dc machine because _______ None of the listed here Carbon lubricates and polishes the commutator Carbon is cheap Contact resistance is decreased None of the listed here Carbon lubricates and polishes the commutator Carbon is cheap Contact resistance is decreased ANSWER DOWNLOAD EXAMIANS APP
DC Generators The resistance of armature winding depends on Cross sectional area of the conductor Length of conductor Number of conductors All of the listed here Cross sectional area of the conductor Length of conductor Number of conductors All of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators For a D.C. machines laboratory following type of D.C. supply will be suitable Rotary converter Synchronous motor D.C. generator set Mercury are rectifier Induction motor D.C. generator set Rotary converter Synchronous motor D.C. generator set Mercury are rectifier Induction motor D.C. generator set ANSWER DOWNLOAD EXAMIANS APP
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