Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 50 Hz. 16.67 Hz. 25 Hz. 60 Hz. 50 Hz. 16.67 Hz. 25 Hz. 60 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Both 1and 2 Speed of alternators should be same Terminal voltage is same Frequency should be same Both 1and 2 Speed of alternators should be same Terminal voltage is same Frequency should be same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because rotor torque will not be produced. none of above. air friction will prevent it. induction motor will become synchronous motor. rotor torque will not be produced. none of above. air friction will prevent it. induction motor will become synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________. 5 %. 2.67 %. 1.5 %. 30 %. 5 %. 2.67 %. 1.5 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The type of DC motor generally used for shears and punches is Shunt motor. Differential compound motor. Cummulative compound motor. Series motor. Shunt motor. Differential compound motor. Cummulative compound motor. Series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The functions of inter poles are both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation None of these both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation None of these ANSWER DOWNLOAD EXAMIANS APP
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