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 voltage magnitude same frequency same phase sequence same prime mover speed same voltage magnitude same frequency same phase sequence same prime mover speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is Inversely proportional to the armature current. Proportional to the square of armature current. None of above. Proportional to the armature current. Inversely proportional to the armature current. Proportional to the square of armature current. None of above. Proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a single phase capacitor start induction motor which of the following is valid? Rotation can be changed by reversing main winding terminals. Rotation can be changed by interchanging supply terminals. None of these. Direction of rotation cannot be changed. Rotation can be changed by reversing main winding terminals. Rotation can be changed by interchanging supply terminals. None of these. Direction of rotation cannot be changed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does the use the of height flux density value in transformer design lead to? Reduced iron loss. Increase in weight/KVA. Decrease in weight/KVA. Reduced copper loss. Reduced iron loss. Increase in weight/KVA. Decrease in weight/KVA. Reduced copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What are the starters used for starting of cage motors? DOL starter. All of these. Auto transformer starter. Star-delta starter. DOL starter. All of these. Auto transformer starter. Star-delta starter. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V. can not be determined. 133.22 N-m 266.20 N-m. 234.76 N-m. can not be determined. 133.22 N-m 266.20 N-m. 234.76 N-m. ANSWER DOWNLOAD EXAMIANS APP
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