ASHCHARYA BANSAL

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ISRO / NPCIL / BARC INTERVIEW EXPERIENCE

For NPCIL

NPCIL INFORMATION

My name Abhishek Maddeshiya Completed my b.tech from a private college in gaziabad in 2021 after that I joined made easy in 2021 delhi C batch and due to second wave of COVID offline classes is closed and it affected prepration also but after 2 - 3 months online+ offline classes started and prepration going on made easy provided a base to me avg student and given gate 22 exam and just qualify with 7000+ rank really disappointing uske baad phir restart Kiya mock + revision pr focus Kiya sath sath me other exam psu ki bhi taiyree kartaa tha 2022 me hpcl exam huaa usme Mera written ho gyaa lekin interview out 2023 gate exam not up to good rank got 1191 rank Cleared BARC written interview out NPCIL interview out IOCL interview out HAL written out by 1 marks Really disappointing but my parents/brother always support me to keep going Then SSC JE 2023 exam Pre 148.25 (technical 95 correct/100 question) Mains - 264 marks Finally selected in SSC JE 2023 CWC with AIR 122 Still prepration going on 24 gate/ese exam One thing is learning that if you have willing to go forward despite of failure God will always support THANK YOU

NPCIL interview Interview centre – Mumbai Date – 9 June 2023 First document verification was done and then we were called for interview. In my interview 7 members were present, six male and one female. They asked my name and asked me where am I from and about my college. The ask me about my year gap.( HR part was very short) After this they sent me to the white board and started with technical part. They ask me to write the favourite subjects I wrote SOM ,FM, THERMO ,POWER PLANT , CASTING. 1. They told me to draw a tapered bar with load acting p and diameter d1, d2 and asked me to derive the elongation (change in length ) equation. 2. The second question was from casting they asked me about investment casting and why it is different from other casting methods and they also asked about the type of materials used in investment casting. 3. Third question they asked about heat exchanger and how it works . Then they asked about condenser and told me to draw the graph & and asked how the efficiency will change if you will change the curve of the graph. 4. Next question was related to the condenser's temperature curve : suppose if you have a thermometer in your mouth, draw the temperature graph of the thermometer. 5. Fifth question was asked from second law of thermodynamics and they also asked about availability and availability function , and the ask about the high grade and low grade energy with examples. 6. They told me to draw open container and make an orifice at bottom and asked the flow rate, after this they told me to make a pipe extending from the orifice and told me to draw pressure curve along the length of pipe. 7. At last they ask about centrifugal pump, and they told me to draw the pump characteristics and asked how the graph will change if I put a identical pump in parallel. My interview lasted for 30- 40 minutes.

Good evening sir, My NPCIL interview experience - 10/06/23 - Narora My interview was just before lunch. There were 7 members in the panel seated 4 on the right side of the table and 3 on the other. The questions were asked from right side members only. And the 3 members were only noting down continuously from my entry to exit. They started asking about me, my family and college etc etc. I am from AMU so they asked that it is a good University you must be placed somewhere, I denied and gave them an explanation as in 2020 CAA NRC protest was going on there and also corona hit the country. After this they asked if my btech project was completed or not. After this they asked if I was doing any job or not. Then they asked me to tell the subjects which I have studied for the interview. I told Thermo, SOM, FM and HT. *Questions* 1. What do you know about power plants? (I told them about the GT plant ) 2. Is there any other type of powerplant? Answered Rankine. 3. Then they asked me to go on board and draw the brayton cycle. 4. How the efficiency of it be increased? Told all modifications with reasons. (as told by you 🙏🏻🤩) 5. Draw the Rankine cycle and tell the difference between Carnot and Rankine cycle and why we prefer Rankine cycle over Carnot cycle in power plant? 6. Also asked the same modifications as in the GT cycle. i.e. to increase efficiency. 7. Given a diagram of shaft with 3 pulley/gear on it. And asked if driven with center pulley/gear what would be TMD. I told them I won't be able to draw because I need one more data. i.e. data for at least 1 extreme pulley. They gave data for all. I drew TMD, then they asked if the shaft is under utilised as 100W power given at mid and is not delivered 100W completely.(I denied and told them that the total power in and out are same hence it is utilising power completely, though torque is not same throughout. Because by torque we can identify the critical section of the shaft and design accordingly.) 8. If you are given two identical balls with the same surface finish how will you distinguish between them, if one is of cast iron and the other is stainless steel. (After thinking a lot I answered them, by magnet). Then they modified the question and asked if the ball is of mild steel instead of SS. Then? I answered, by sound test. They weren't satisfied and asked about properties of material. Then asked again to distinguish. (They wanted to listen - by the hardness test.) 9. How to locate center of shaft? (I answered locating center of circles by radii-tangent method) They asked another method.(I answered, by wrapping a thread over it and measuring it and equating it to 2πr, radius will be known and by arcs equal to radius center can be located) 10. How to reduce the dia of a shaft from 75 mm to 72 mm and how will you tell your worker? (I started telling turning process) They stopped and told me that I don't have to do the operation, I have to convey it to the worker and moreover the shaft is not exactly circular. Its dia is varying from 74-76 mm. (I drew both drawings and told them that I don't know the exact procedure to convey ( i.e. the drawing notations) but I will give instructions in writing.) They were more or less looked satisfied and asked me to leave the board and be seated. Then they asked _will I be able to work anywhere or any site preferences_ ? ( _This question they asked everyone that day_ ) Then they asked me to leave and when I picked up my portfolio then they asked me to touch the bell and tell which is colder and why? (I answered, our fingers feel/sense the HT rate and as the bell is made of metal and has a higher HT rate than plastic/leather.) That's all and I left the interview room.

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