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SAIL MT INTERVIEW EXPERIENCE Date 30/04/2024 Venue Delhi Interview + GD +GT + Case study Interview Introduce yourself can you work in mines or plant justify How many laws in thermodynamics what does the name zeroth law explain what is third law what is entropy what is thermal energy what is diff between temp and heat what is Reliability, MTBF diff b/w SI and CI engines what does carburetor do GD Voting age should be increased to 21 disscuss and come to a conclusion GT To improve work place environment 8 points are given arrange them in your individual preference and disscuss and arrange them in group preference Case study your are governing body of a social club 5 members list is given we have to shortlist only one disscuss among group and come to a final conclusion

SAIL 2024 interview experience

BDL INTERVIEW EXPERIENCE

ISRO INTERVIEW

So they said let me give you a hint if you want me or him( a interviewer in side, who was very thin) whom will you take to space,so i thought for a second or two and then i chose for the thin person, so they said yes design it for minimum weight i gave some answers Then they shifted to hmt Where is thermal diffusivity used What it signifies What is thermal resistance What is formula for slab , sphere Write one dimensional heat conduction equation I wrote down in all three co- ordinate system They said "is third one(spherical co-ordinates) is correct" I corrected there was an error they now said is it correct now I said yes ( when i checked from book after interview it was correct) What is a satellite What are its functions Thank you Be calm and focus on basics rather than on rocket science things interview experience brief intro fav subject- me themo fm som power plant - they asked other than this material science or mfg or tom I said tom draw a pendulum with string what is it's dof I said two they said - if string is rigid then i- 1 attach a spring in series then what will be the motion draw a beam attach a beam perpendicular to this and attach a mass on it degin the beam if rotating with angular velocity w draw equilent cantilever beam how will u find height of chimney without any instrument if u are on the top of chimney then how will u find 22/02/2018 delhi interview just before lunch intro, fav sub 1) what is column draw the coulmn and various auxillary question on column like deformation when coulmn is elastic and rigid, value of deformation Apply eccentric load, moment, defelction of free end , meaning of fixed support What if e is more than free end deflection(Which I said I don't know) 2) what is first law, what does it tell us about energy conversion, second law, kelvin plank statement, what does it say about efficiency, Drive relation b/t Temp pressure for polytropic pro ess, if a system is being taken from state1 to 2 while mass has been taken out what will be equations 3) a system have less mass when measured than find out with help of equation what is the reason ? Answered : compressibility than asked what will be its value z>1 or z<1 ? I did analysis and told z> 1 ( appreciation, looked happy) 4) draw plate tightened by nut-bolt ( ENGINEERING DRAWING PROBLEM) ( drawn ) what will be stresses in plate, bolt , and free part of bolt. one member said u can go now. one more question .. suppose a force is applied on the block for 2 seconds horizontally which is laid on frictionless surface draw velocity vs time for 5 second also displacement vs time interview experience 22/02/2018 8:30 fourth number 1-tell me about yourself 2-what is ur favourite subject (said 4 som HMT fluid thermo) 3-tell me one more (engineering mechanics) member2 - draw a cantlever varying cross section 40 mm at fixed 20 mm at end ..the types of stress and its variation member2 whats is laminar and turbulent flow what is entrance length head loss in pipe convert 2 parralel pipes in single pipe if a spherical ball is anchor what will be tension in the road magnitute of buyoncy force and how to calculate it member3 when u are ill u go to the doctor he keep thermometer in your mouth draw its temperature response with respect to time member what is frustum of cone draw its plan elvation side view . .. question were extremely basic..they are not giving u that much time to think.. all the best

interview lasted for 20 min 1. Define sensible heat & latent heat 2. Find temp for a case given 3.Draw stress strain diagram for mild steel and aluminum and how to find Modulus in that 4. Why aluminum don't show yield point 5.Design a cantilever beam for minimum deflection and choose between steel and aluminum ? 6. Draw velocity diagram of turbine , obtain work output an efficiency from it and sign convention 1. Draw the shaft and how to design. First I said find the reaction then draw the sfd and bmd but they ask Why u r drawing sfd. I said for finding where the bending moment Max. 2. They asked can I find max bending moment without sfd. 3. When I wrote shear stress equation equal to yield stress divide by two then asked where yield stress come from. 4. Then asked Will there any term will come. I said factor of safety. 5. What is the value of factor of safety for shaft. 6. A brittle long sheet how you will take through small strict. 7. How to you find the brittleness between two materials. 8. Draw the stress and strain curve for brittle material. 9. Difference between steady and uniform flow. 10. Flow measurement devices and advantages and disadvantages of venturi meter and orifice meter. 11. Difference between compressible and incompressible flow. 12. About the entrance length. 13. Draw the velocity profile for fully developed laminar flow. my interview experience.. 15-20 mins.. asked fav subjects other than materials science.. i told hmt, som, tom.. 1. draw cantilever with point load at middle and torque at the free end.. how will u design the beam.. 2. what if torque changed to a sine function varying with time . what happens now 3. Draw S-N curve 4. modes of heat transfer 5. you r riding a bike and it comes to a traffic signal and stops. when will you feel more heat ? while at signal or while running 6. what is fins ? explain 7. explain newtons law of convection 8. why is fins coated with some paint( dont remember exactly) 9. how to enhance heat transfer from a given fin 10. draw vcrs cycle? 11. which one is throttling? 12. indicate subcooling 13. explain how subcooling is carried out 14. draw inversion curve and explain 15. what is joule thompsons coefficient 16. what is degree of freedom 17. a body in space has how many dof ? which are they? 18. what is difference between extrusion and wire drawing operations ? 1.)Vertical member is subjected to axial load, how will it fail? 2.)criteria for buckling and crushing? 3.)for hinged column, load value? 4.)what is EI? 5.)how will member fail due to torsion? 6.)diff. Between gauge and absolute pressure? 7.)static pressure, dynamic pressure? Draw a pipe and show the points where these can be measured? 9.)how can we make solid circular with two faces flat? 10.)ever seen a machine tool for very large diamter rods? 11.)types of heat transfer? 12.)mass transfer? 13.)in vacuum, which is predominant? 14.)while driving bike, which is predomimant? 15.)Draw a L-shaped member and find the stresses due to bending and torsion? Temp. is changed but still no thermal stress, how? Ductile materals? Why ductile marerials are used? 08Isro interview experience Dated 23 feb 2018 I was the first candidate for the interview interview started at 8:30 am It started with a brief introduction then they asked my favourite subjects Q.s started as What is casting What are advantages Why it is preferred over another processes What is cast iron Properties of cast iron Percentage of carbon in cast iron What are defects in casting What are materials used in spacecraft Please come on the board Draw a cantilever with a point load at the end with rectangular cross section Draw bending stress distribution If a turn it by 90 degree which one will be better consider width is greater than height. What is optimization How will you design this for optimisation I gave the answer but they were not fully satisfied

ISRO INTERVIEW

Isro Scientist interview experience Name- Sanjay salgar Date-16/04/2021 Venue- bengaluru Reporting time-2pm Required Documents- call later, covid report, declaration form, Ta form and ticket, Interview questions(6 panel member including chairman) 1)introduction 2)favorite subjects(only 2-3 questions from favourite subjects) 3)different laws of friction? 4)type of friction? 5)which is more? And why? 6)draw the graph and explain on board 7)how to measure coefficient of friction 8)methods of manufacturing of small balls used in bearing 9)effect of surface roughness of ball 10)material used for balls 11)why it is hard? 12)no of stress components at point 13)draw a cantilever beam with udl and one point load at tip 14)find out slope and deflection? 15)different methods used to find out slope and definition? 16)assumption made in superposition? Is it applicable every where? 17)what is castigliano's theorem?write down equation? 18)now sit down on chair..are you comfortable in automobile? 19)there are two drives, belt drive and gear drive, which one will you prefer? 20)have you seen belt drive anywhere? 21)why we prefer flat belt drive over another belt drive? 22)types of bearing? 23)difference between self lubricated bearings and pre lubricated bearings 24)density of steel? 25)density of aluminum? 26)how to measure density of irregular shape of stone? 27)question related to transition temperature 28)which material will you prefer for very low temperature application? 29)material used to manufacture turbine blade? Many more questions... Interview duration is about 25-30min

ISRO INTERVIEW EXPERIENCE

ISRO

ISRO interview experience https://www.quora.com/What-should-I-expect-at-the-ISRO-interview-for-the-post-of-Scientist-Engineer-SC-Mechanical/answer/Ruman-Hasan?ch=15&oid=205744883&share=0630fc75&srid=qHSE&target_type=answer

ISRO INTERVIEW EXPERIENCE

ISRO / DRDO INTERVIEW EXPERIENCE

Jodhpur, 19/07/2021 1st to be interviewed Brief Intro Fav subj-SOM, TOM, HT and Thermo They didnt ask from favourite subjects mostly that time. 1)name 3 materials used in spacecraft, told, after that he said just 3? Then i added 2 or 3 more materials. 2) what are material used in aircraft 3)why aluminium alloy 4)at what location in aircraft titanium is used - i was not sure but i answered and explained the reason Cryogenic materials 5) go to board draw a beam, load p at end, what is its stain energy write in short form, draw its stress distribution.they asked few more questions. 6) draw a curved beam of radius r what is its strain energy(i didn't understand the question properly, 2 times voice not clear and 3rd time he spoke while i was speaking too) but explained generalised method in the end 7)if only moment is acting on a beam which tof will you use to design it. 8) what are tof for ductile, what is MDET, what is von mises theory (both are same), i got confused between MSST and MDET due to interview pressure then he asked to write expression for von mises. 9)he said now i am going to ask you from math, he said what is value of log0, i said negative in infinite he said can you prove it.I used graph and expansion method to prove it 10) what is isometric and perspective drawing.. 11)can you show us perspective drawing on board with example, i drawn. 12)what is 3rd angle 1st angle. I couldn’t explain due to pressure but took help of duster and my hand to explain my point 13)what are machining operations, i explained gave examples of few operations Out of that they choosen milling. 14)okay milling - what is up and down milling-shown on board. 15) in up milling where is chip thickness maximum at end or in starting of machining. I was asked to go to white board 4-5 times ,i was worried about compressibility chart and characteristics curve, fm etc etc, but they choosen different field.

ISRO Interview experience Name- Sanjay salgar Date-16/04/2021 Venue- bengaluru Reporting time-2pm Required Documents- call later, covid report, declaration form, Ta form and ticket, Interview questions(6 panel member including chairman) 1)introduction 2)favorite subjects(only 2-3 questions from favourite subjects) 3)different laws of friction? 4)type of friction? 5)which is more? And why? 6)draw the graph and explain on board 7)how to measure coefficient of friction 8)methods of manufacturing of small balls used in bearing 9)effect of surface roughness of ball 10)material used for balls 11)why it is hard? 12)no of stress components at point 13)draw a cantilever beam with udl and one point load at tip 14)find out slope and deflection? 15)different methods used to find out slope and definition? 16)assumption made in superposition? Is it applicable every where? 17)what is castigliano's theorem?write down equation? 18)now sit down on chair..are you comfortable in automobile? 19)there are two drives, belt drive and gear drive, which one will you prefer? 20)have you seen belt drive anywhere? 21)why we prefer flat belt drive over another belt drive? 22)types of bearing? 23)difference between self lubricated bearings and pre lubricated bearings 24)density of steel? 25)density of aluminum? 26)how to measure density of irregular shape of stone? 27)question related to transition temperature 28)which material will you prefer for very low temperature application? 29)material used to manufacture turbine blade? Many more questions... Interview duration is about 25-30min