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 200 V. 300 V. 223.V. 150 V. 200 V. 300 V. 223.V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have more starting torque. smoother acceleration. reduced starting current. more starting time. more starting torque. smoother acceleration. reduced starting current. more starting time. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shunt dc motor the direction of rotation of the motor will reversed. When only field terminals are changed. only armature terminals are reversed. none of above. either field terminals are reversed or armature terminals are reversed. only field terminals are changed. only armature terminals are reversed. none of above. either field terminals are reversed or armature terminals are reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss remains constant. None of these increase. decrease. remains constant. None of these increase. decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, the no-load slip is generally equal to 4 %. zero. less than 1 %. 1.5 %. 4 %. zero. less than 1 %. 1.5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to withstand any unbalanced magnetic pull on the armature core. All of these bending moment due to weight of the armature. twisting strains due to transmission of torque. any unbalanced magnetic pull on the armature core. All of these bending moment due to weight of the armature. twisting strains due to transmission of torque. ANSWER DOWNLOAD EXAMIANS APP
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