Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 0 Hz 100 Hz 25 Hz 50 Hz 0 Hz 100 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to overload. overheating of winding. poor lubrication. uneven air gap. overload. overheating of winding. poor lubrication. uneven air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the supply terminal of a DC shunt motor are interchanged The motor will stop. The direction of rotation will reverse. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The motor will stop. The direction of rotation will reverse. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? +3.33% +3% -3.33% -3% +3.33% +3% -3.33% -3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same phase sequence same voltage magnitude same frequency same prime mover speed same phase sequence same voltage magnitude same frequency same prime mover speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will remain unaltered increase by 100% reduced to half increase by 200% remain unaltered increase by 100% reduced to half increase by 200% ANSWER DOWNLOAD EXAMIANS APP
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