Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by reducing the load voltage. increasing the excitation. increasing the input to the prime mover. cooling the armature. reducing the load voltage. increasing the excitation. increasing the input to the prime mover. cooling the armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the advantages of parallel operation of alternators? All of these Increase in reliability Increase efficiency under light load conditions continuity supply is maintained All of these Increase in reliability Increase efficiency under light load conditions continuity supply is maintained ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which 1 - Φ motor does operate at high power factor? Capacitor start. Capacitor run. Shaded pole. Split phase. Capacitor start. Capacitor run. Shaded pole. Split phase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has negative speed regulation? Both B and C. Series motors. Differential compound motors. Shunt motors. Both B and C. Series motors. Differential compound motors. Shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer core is made up of a silicon steel laminations which has maximum flux density 1 Tesla. If it was cold rolled grain oriented its flux density increases to 1.6 Tesla. What is the saving in core size or area due to cold rolled grain oriented process? 40% 60% 38% 68% 40% 60% 38% 68% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The crawling in the induction motor is caused by low voltage supply harmonics developed in the motor improper design of stator laminations high loads low voltage supply harmonics developed in the motor improper design of stator laminations high loads ANSWER DOWNLOAD EXAMIANS APP
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