BARC INTERVIEW EXPERIENCE 2018

BARC Interview (24/5/2018) of few candidates

I entered and stood behind chair.
Sir -sit down please.
Me-Thank you Sir.
(4sir+1mam)all were smiling. 

1-Where do you belong?
2-Asked about AMU entrance test. (Because of my college- AMU)
3-You came alone ?
4- Mumbai kab pohonche?
5- So you got enough sleep?
6-Gave me a page and pencil and asked me to write 5 core mechanical subjects.
(SOM, THERMODYNAMICS,HT, VIBRATION,ENGG. MECHANICS)

Q1- Told me to draw a conical horizontal bar and specified temperature at both ends and asked me to draw temp profile.
Q2- Same as above but thermal conductivity varying with temperature.
Q3 -Told me to draw a cylinder and specified temperature at outer area and somewhere in middle and asked me to tell the temp profile.
Q4- Same as above but thermal conductivity varying with temperature.
Q5- Same as above but now gave K1, K2. and  asked me to show the variation again.
Q6- Draw a bar and apply axial forces P on 1 cross section,2P on other cross section.
Will there be any stress? 
What will this remaining P do to this bar ?
What about velocity and acceleration of this bar.
If the bar is dropped from a height? 
What happens to velocity and acceleration?
Q7- Draw a cantilever beam and apply a vertical load at some gap from free end asked me to draw deflection curve.
I answered but he gave me some alternate curves and asked me that " aisa bhi to ho skta hai..Apne waisa hi kyu banaya " ?
Q7- Asked what type of stress bar will feel?
Q8- Then told me to assume the cross-section of bar to be solid circular and asked me to draw bending stress variation.
Q9- Now assume it hollow circular and asked bending stress variation.
Q10- Now made it more thin (more hollow) and asked the difference.
Q11- What is section modulus ?
Q12- Effect of section modulus in above question .
Q13- What is failure ? 
Q14- Cycle ko turn karte time velocity kyu kam karte hai aur tilt kyu karte hai ?
Q15- Draw a vertical ring with a bead at bottom (it can slide over the ring) and rotated it about vertical axis and asked where this bead will stay ?
Q16- A tank filled with water supported over a support at middle. If disturbed it can topple on any side. Put a thread in water along the breadth of tank dividing the tank in two parts
Now put wooden small balls on one side of thread one by one without jerk thread will restrict them from going on other side
What will happen will it topple ?
Q17- Boiling will be fast where ? At plane or at the top of hill ? Why?
Q18- Heat a vessel with water inside and cool it under tap suddenly now when you open it , It does not open easily  why ??
Q19- Draw a metallic cylinder with a piston in equilibrium initially inside condition ( P1,V1). Now restrict the motion of piston and put a weight W over it. Now remove the restrictions .What will happen ? Draw the process.
Q20- Same as above but now put weight gradually in fraction of W/100. Till it reaches,  What will happen? Asked me to differentiate between both condition.
Interview finished.

Then asked me about when I will return ? 
Where I am staying ? Have I got admission in IIT ? Did you liked your today's interview ? Is it your first interview ? Then permitted me to leave..
My interview was last interview of that day. 
Duration : 1 hour.

BARC INTERVIEW MECHANICAL ENGG.

Venue : Mumbai

Entered the room with a wish.
Talk about whether have you taken coaching or not ?

Purely Technical.

Also asked to bring my certificates folder because to have a look at courses.

1. Draw PV diagram for all process and also its usage in different cycles.
2. If you heat a container for long time then draw temperature profile.
3. Elongation in a bar due to its own weight. Derive..
4. Efficiency of power plant and where these losses are maximum. (Ans: In condenser the losses will be maximum)
5. Based on above question, why we are using condenser. They wanted to ask me why not just put the water after turbine to pump ?
6. Draw the stress strain diagram. What is factor of safety ?  Why it's used ?
Suggestion: have a look at derivation of different formulas.

HAL INTERVIEW EXPERIENCE

HAL Interview 29/05/2017 

Post : Management trainee
Panel : 8 members including 1 lady

1. Introduce yourself in 1 minute.
2. 10th and 12th % and why you scored less in 12th std ?
3. Why not M.Tech ? It is good option ?
4. Favourite subject?
5. Type of flow (laminar , turbulent)
6. How to differentiate laminar and turbulent ?
7. Critical Reynolds Number?
8. Grashof's formula (they asked empirical relationships of other number I said  "I don't remember").
9. About HAL,  Name any one aircraft and one helicopter manufactured by HAL.
10. Difference between aircraft and helicopter.
11. What is Mach number ?
12. For Mach number 1.5  what type of flow ?
13. What is compressible and incompressible fluid ?
14. Why incompressible fluids are used in machinery ?
15. Where you applied other than HAL ?
16. Your next interview ? (NTPC)
17. Which one will you join ?
18. If you are selected in both and HAL posting in Odisha and NTPC posting in your town which one you will join and salary of NTPC is also high ?
Duration : 20 minutes

HAL INTERVIEW ( 29/05/17)

Post : Design Trainee 

1.) Tell me about yourself.
2.) Your technical strength.( I said SOM , THERMO and they asked one more FM- I said)
3.) Principal stress and strains.
4.) Importance of principal stresses for design.
5). Application of Bernoulli's theorem.
6.) Aerofoil shape .
7.) Why selected design trainee instead of management trainee ?
8.) How you are suitable for designing ?
9.) Why HAL over Railways? ( bceause my father is in Railways and my father's elder brother is in HAL)
10.) SFD and BMD.
11.) Types of beam ?
12.) Other PSUs form  that you have filled.
13.) Application of beams.
14.) What design factors you consider for designing purpose ? e.g. designing of overhead crane.
15.) What you have learned from your previous job ?
16.) What qualities you have to be suitable for design trainee ?
17.) Heat treatment ?
18.) What are alloys ?
19.) Why we make alloys ?
20.) Why heat treatment is done ?
21.) What are the hardening processes ?
22.) Why you have chosen Kanpur division ?
23.) Losses in pipes ?

Duration : 35-40 minutes

No question from project and Training were asked.