Electrical Machines A smaller air gap in a induction motor helps to reduce the chance of crawling. reduce the magnetizing current. increase the starting torque. reduce the chance of cogging. reduce the chance of crawling. reduce the magnetizing current. increase the starting torque. reduce the chance of cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be 650 W 700 W 625 W 600 W 650 W 700 W 625 W 600 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Essential conditions for two DC generators are connecting for parallel operation is/are terminal voltage should be same. polarities should be same. rating of generators should be same. both A and B. terminal voltage should be same. polarities should be same. rating of generators should be same. both A and B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dissolve gas analysis of transformer oil is carried out to determine condition of bushing stud. condition of bushings. condition of transformer. condition of transformer oil. condition of bushing stud. condition of bushings. condition of transformer. condition of transformer oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generator will not build up voltage any one of above. if it has lost residual magnetism. due to wrong direction of rotation. if field resistance is more than critical resistance. any one of above. if it has lost residual magnetism. due to wrong direction of rotation. if field resistance is more than critical resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ? 2 alone 1 and 2 1 and 3 1, 2 and 3 2 alone 1 and 2 1 and 3 1, 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
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