Electrical Machines Motors for fans and pumps are selected in the rpm range 375 to 500. 500 to 720. 1440 to 2880. 720 to 920. 375 to 500. 500 to 720. 1440 to 2880. 720 to 920. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 30 Hz. 35 Hz. Can be determined. 20 Hz. 30 Hz. 35 Hz. Can be determined. 20 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 230 V. 225 V. 222 V. 220 V. 230 V. 225 V. 222 V. 220 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 100 ohm. 50 ohm. 0.1 ohm. 0.5 ohm. 100 ohm. 50 ohm. 0.1 ohm. 0.5 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor uses 4-point starter? DC shunt motor with armature resistance. DC shunt motor with field weaking control. DC compound motor. DC series motor. DC shunt motor with armature resistance. DC shunt motor with field weaking control. DC compound motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is 18.18% increase 36.36% increase 36.36% decrease 36.36% increase 18.18% increase 36.36% increase 36.36% decrease 36.36% increase ANSWER DOWNLOAD EXAMIANS APP
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