Electrical Machines Which of the following DC generators has rising V-I characteristics? Shunt. Compound. Series. None of them. Shunt. Compound. Series. None of them. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately-excited DC generator, running at rated speed, has 6 volts across its armature terminals with no field current. When field winding is excited with one ampere, the voltage builds up to 250 V at no load. In case field current is reduced to zero, with the speed remaining unaltered, the armature terminal voltage would be less than 6 V zero more than 6 V 6 V less than 6 V zero more than 6 V 6 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hopkinson test is conducted under which of the following condition? no load any of the above half load full load no load any of the above half load full load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. improve with fall of terminal voltage. improve with rise in terminal voltage. deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. improve with fall of terminal voltage. improve with rise in terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Series. Differntical compound. Shunt. Cummulative compound. Series. Differntical compound. Shunt. Cummulative compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for both cooling and insulation. insulating. lubrication. cooling. both cooling and insulation. insulating. lubrication. cooling. ANSWER DOWNLOAD EXAMIANS APP
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