Electrical Machines The application that need frequent starting and stopping is blowers. lifts and hoists. jaw crushers. paper mills. blowers. lifts and hoists. jaw crushers. paper mills. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an additional resistance is connected in series with a DC motor operating at rated speed, the speed of the motor will Increase. Remain unaltered. Reduce. Oscillate around the normal speed. Increase. Remain unaltered. Reduce. Oscillate around the normal speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current Woud be equal to 2If1. Would be equal to If1. Would be equal to If1/2. Cannot be predicted due to insufficient data. Woud be equal to 2If1. Would be equal to If1. Would be equal to If1/2. Cannot be predicted due to insufficient data. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Methods of synchronizing of alternator may be done by all of these. all dark lamp method. all bright lamp method. one dark two bright. all of these. all dark lamp method. all bright lamp method. one dark two bright. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant torque drive below the base speed. constant power drive above base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant torque drive below the base speed. constant power drive above base speed. constant torque drive above the base speed. constant hp drive below the base speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be 271.7 V. 256.4 V. 240 V. 238.2 V. 271.7 V. 256.4 V. 240 V. 238.2 V. ANSWER DOWNLOAD EXAMIANS APP
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