Electrical Machines Oil is provided in an oil filled transformer for both cooling and insulation. cooling. insulating. lubrication. both cooling and insulation. cooling. insulating. lubrication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? MNA GNA either GNA or MNA None of these MNA GNA either GNA or MNA None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field winding connection of DC shunt motor is changed It will run in opposite direction. motor will not run. It will run in same direction. motor will become slow. It will run in opposite direction. motor will not run. It will run in same direction. motor will become slow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will remains same. none of these. increase. Decrease.d remains same. none of these. increase. Decrease.d ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause vibrations. double frequency currents in the rotor. All of these heating of rotor. vibrations. double frequency currents in the rotor. All of these heating of rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor electromagnetic power varies directly as applied voltage directly as square of applied voltage inversely as applied voltage None of these directly as applied voltage directly as square of applied voltage inversely as applied voltage None of these ANSWER DOWNLOAD EXAMIANS APP
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