SurendraReddy_ElectricTeacher
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This is a public channel launched by Mr. Surendra Reddy. It is intended to post practice questions and answers on Electrical Machines subject. Call us: 9515694053 Visit: www.ohminstitute.com
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频道帖子
The no-load current through the tertiary delta connection of a star-star-denta, 1:1:1 ratio transformer is 5 amp. Now, a balanced 3-ph load of 10 amp, UPF is connected on the secondary star side. What would be the delta winding current?
| 2 | The air-gap power in a 6-pole, 50 Hz induction motor is 40 kW and it's output power is 36 kW. Neglect rotational loss and calculate the torque developed (in N-m)? | 1 002 |
| 3 | What must be the turns ratio of a star-delta transformer to be connected with a 11 kV/33 kV delta-star transformer in parallel? | 1 358 |
| 4 | A synchronous motor operates at full load such that the synchronous reactance drop (IaXs) is equal to the terminal voltage per phase. If the (IaXs) drop is 30% less than the induced EMF, calculate the motor's power factor? | 4 004 |
| 5 | An alternator is connected to an infinite bus-bar and delivers rated power at 0.8 lag pf. To improve the power factor to unity, which of the following procedures will be used? | 1 956 |
| 6 | The starting current and torque of a 500 V DC shunt motor is 400 A, 500 N-m respectively. What would be the torque at a full-load speed of 300 rad/sec? | 2 201 |
| 7 | The speed of a 3-phase, SCIM, 50 Hz induction motor is 750 rpm at no-load. It's speed with full-load torque is 95% of no-load value. What would be the new speed of stator poles being changed to 6 by keeping the load torque constant? | 2 566 |
| 8 | A 100/200 V, 10 kVA transformer has a maximum regulation of 10% at full-load. This transformer offers zero regulation at 0.8 lead power factor. What would be the full-load copper loss of this transformer? | 2 620 |
| 9 | Coil span: 11 slots. Typo error | 2 810 |
| 10 | A 10 pole alternator has 120 slots in stator. Each coil has a span of 9 slots. The value of pitch factor is __ | 2 825 |
| 11 | Supply frequency** | 2 919 |
| 12 | The no-load current drawn by a 11 kV, 50 Hz transformer is (1-j5) A. If the supply voltage changes to 75 Hz, the magnetizing reactance (in k-ohm) would be _ | 2 859 |
| 13 |  🎉 A Proud Milestone for Our Institute! 🎉
🏆 7 of our students have been selected as Executive Trainees at NPCIL through their GATE scores! ⚡🇮🇳
This achievement is a reflection of their hard work, consistency, and determination, along with the dedicated guidance of our faculty.
🌟 Heartiest congratulations to all the selected students! May this be the beginning of a successful and impactful career in India's nuclear power sector.
To all GATE aspirants: Your dream job is possible with the right strategy, consistent preparation, and unwavering dedication. Keep believing in yourself!
💙 Thank you to every student and parent who trusts us with their dreams. We remain committed to producing more success stories.
#NPCIL #ExecutiveTrainee #GATE #GATE2026 #ElectricalEngineering #Engineer #GovernmentJobs #SuccessStory #GATEPreparation #DreamJob #Electrical #FutureEngineers #ProudMoment | 2 766 |
| 14 | A 500 V DC shunt motor has a starting current of 250 A and full load current of 50 A. The mechanical power developed at full-load will be _. Neglect the rotational losses. | 2 789 |
| 15 | If the load connected on a 3-phase, 4-pole, 50 Hz induction motor is equal to it's breakdown capacity, then the operating slip will be ___. Consider the standstill rotor impedance as (1+j5) ohm/phase. | 3 470 |
| 16 | https://youtu.be/rHAkIZ9-nCg?si=QLre4Xe6vj9lBT1e | 2 968 |
| 17 | https://www.apspdcl.in/files/pdf/FINAL%20WEBSITE%20NOTIFICATION%20OF%20AEEs%20RECRUITMENT.pdf | 2 810 |
| 18 | The operating slip of a 3-phase, 400 V, Y-connected, 50 Hz, 2-pole induction motor is 0.06 and it's rotor voltage per phase at this slip is 10 V. What would be the turns ratio of this motor? | 3 265 |
| 19 | The magnetizing reactance of a transformer is independent of ____ | 3 140 |
| 20 | https://www.youtube.com/live/SsH2iFqqF9A?si=QRoLltjXVl9qeMgR | 3 091 |
