Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will improve and the speed falls. deteriorate and the speed rises. improve and the speed rises. deteriorate and the speed falls. improve and the speed falls. deteriorate and the speed rises. improve and the speed rises. deteriorate and the speed falls. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 950 rpm 850 rpm 900 rpm 1000 rpm 950 rpm 850 rpm 900 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at lagging power factor. leading power factor. unity power factor. any of the above. lagging power factor. leading power factor. unity power factor. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series generator. DC series motor. DC shunt generator. DC shunt motor. DC series generator. DC series motor. DC shunt generator. DC shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following winding is connected in series with armature winding of DC machine? Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant torque drive above the base speed. constant power drive above base speed. constant hp drive below the base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant power drive above base speed. constant hp drive below the base speed. constant torque drive below the base speed. ANSWER DOWNLOAD EXAMIANS APP
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