DC Motors If a dc motor is comnected across the AC supply it will Run at lower speed Burn due to heat produced in the field winding by eddy currents Run at normal speed Not run Run at lower speed Burn due to heat produced in the field winding by eddy currents Run at normal speed Not run ANSWER DOWNLOAD EXAMIANS APP
DC Motors In dc machines fractional pitch winding is used To improve cooling To increase the generated emf To reduce the sparking To reduce the generated emf To improve cooling To increase the generated emf To reduce the sparking To reduce the generated emf ANSWER DOWNLOAD EXAMIANS APP
DC Motors Small dc motors up to 5 HP usually have 6 poles 8 poles 2 poles 4 poles 6 poles 8 poles 2 poles 4 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is Self-induced e.m.f. None of these Back e.m.f. Mutually induced e.m.f. Self-induced e.m.f. None of these Back e.m.f. Mutually induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ? Differentially compound motor Series motor Cumulative compound motor Shunt motor Differentially compound motor Series motor Cumulative compound motor Shunt motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc compound machine, Both play equally dominant role Series field winding plays dominant role Either can play dominant role Shunt field winding plays dominant role Both play equally dominant role Series field winding plays dominant role Either can play dominant role Shunt field winding plays dominant role ANSWER DOWNLOAD EXAMIANS APP
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