Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 25 Hz 40 HZ 50 Hz 60 Hz 25 Hz 40 HZ 50 Hz 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in a sub – station there is one 132 / 33 kV transformer whose secondary is connected with primary of one 33 / 11 kV transformer, the total transformation ratio of the sub – station will be, 4. 7. 12. 3. 4. 7. 12. 3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC shunt motors are suitable for Lathes. Centrifugal pumps All of this. Blowers and fans. Lathes. Centrifugal pumps All of this. Blowers and fans. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 16.67%. 18.25%. 14.28%. 15.30%. 16.67%. 18.25%. 14.28%. 15.30%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as crawling. relative speed. air gap. cogging. crawling. relative speed. air gap. cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called crawling. skewing. slip. cogging. crawling. skewing. slip. cogging. ANSWER DOWNLOAD EXAMIANS APP
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