DC Generators The insulating material used between the commutator segments is normally Graphite Paper Mica Insulating varnish Graphite Paper Mica Insulating varnish ANSWER DOWNLOAD EXAMIANS APP
DC Generators The efficiency of a dc generator is maximum when its variable loss is Equal to Constant loss None of the listed here Equal to double the constant loss Equal to half of constant loss Equal to Constant loss None of the listed here Equal to double the constant loss Equal to half of constant loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a D.C. machine stray loss is the sum of Total copper loss and mechanical loss Armature copper loss and iron loss Shunt field copper loss and mechanical loss Iron loss and mechanical loss Total copper loss and mechanical loss Armature copper loss and iron loss Shunt field copper loss and mechanical loss Iron loss and mechanical loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is Identified by the scarring of the commutator segment to which open circuited coil is connected None of these Both of the listed here Indicated by a spark completely around the commutator Identified by the scarring of the commutator segment to which open circuited coil is connected None of these Both of the listed here Indicated by a spark completely around the commutator 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 When two D.C. generators are running in parallel an equalizer bar is used So that the two identical machines will pass approximately equal currents to the load To increase the generated e.m.f. To reduce the combined effect of armature reaction of both the machines To increase the series flux So that the two identical machines will pass approximately equal currents to the load To increase the generated e.m.f. To reduce the combined effect of armature reaction of both the machines To increase the series flux ANSWER DOWNLOAD EXAMIANS APP
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