Electrical Machines The reduced air gap results in an increase starting torque. cost of operation. power factor. breaking torque. starting torque. cost of operation. power factor. breaking torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Series booster is a shunt wound DC generator. series wound DC generator. permanent magnet DC generator. separately excited DC generator. shunt wound DC generator. series wound DC generator. permanent magnet DC generator. separately excited DC generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine All of these positive sequence reactance and negative sequence reactance slip direct axis reactance and quadrature axis reactance All of these positive sequence reactance and negative sequence reactance slip direct axis reactance and quadrature axis reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are 2, 3 , 5 2, 4 ,5 1, 3, 5 1, 4 2, 3 , 5 2, 4 ,5 1, 3, 5 1, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage 150 V. 300 V. 223.V. 200 V. 150 V. 300 V. 223.V. 200 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor will become lagging None of these will become leading will remain the same will become lagging None of these will become leading will remain the same ANSWER DOWNLOAD EXAMIANS APP
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