My BARC interview (7th june)Mechanical (AIR 16)
Interview duration : 1:15 hours
5 minutes general
talks to make environment comfortable.
Q1. Write your favourite subjects.
Q2. A diagram of cantilever is given with inclined load and asked to draw its SFD , BMD.
Q3. Find critical cross-section in the given cantilever.
Q4. Derive formula for deflection at free end.
Q5. Show variation in SFD and BMD if load is shifted towards fixed end.
Q6. Show stress distribution of composite beam.
Q7. Draw Mohr's circle for critical cross-section in cantilever and explain it.
Q8. Piston cylinder arrangement was given with electric heater in it and asked to
draw P-V diagram.
Q9. A cylinder of air (150 bar and 50 degree celcius) plus other data and asked to
find heat supplied till the pressure drop to 10 bar as the cylinder valve is
opened.
Q10. Air conditioner work on which principle ?
Draw the cycle and T-s diagram.
Explain function of each component.
Draw the cycle and T-s diagram.
Explain function of each component.
Q11. Which factor decides working pressure of condenser ?
Q12. How to increase COP of VCRS ?
Q13. Why condenser of refrigerator is inside room ?
Q14. A furnace of composite cylindrical walls was given and asked to draw temperature profiles.
Q15. Drive expression for temperature profile in terms of distance from one end in a
conical solid tube having different temperatures at its ends.
Q16. What are the controlling factors to decide height of pump from sump level.
BARC INTERVIEW EXPERIENCE(MECHANICAL)AIR-244
The panel consisted of 4 members.
They began with a brief 10-15 minutes discussion about my homeplace
and reasons why I left my previous job and also asked what I know about BARC
Interviews.
They were very friendly and easy going and told me to be calm and
stress free.
After that they asked me to write down my favourite subjects.
I
wrote:
1)SOM
2) Thermodynamics
3) Heat Transfer
4) Fluid Mechanics
Q-1: A
container containing 10 kg of water is kept on weighing scale .If a string
is tied to a 1 kg ball (density 10 times than water) and is immersed in the
container, how the reading of weighing scale will change?? (from the time when
ball is completely outside the water to the point when it is completely
submerged; assuming tank is sufficiently large so that water does not overflows
out of tank).
Q-2 A gas is contained in a frictionless cylinder-piston
arrangement whose walls are sufficiently long and the surface above piston is
exposed to atmospheric pressure. The whole assembly is turned upside down
suddenly (so that pistons starts moving down due to its weight). They asked me
to draw P-V diagram of the whole process till a steady state is reached.
Q-3.A
balloon is being inflated with air isothermally so that both pressure and
volume of air inside balloon is increasing. Then why PV=RT is not followed in
this case?? (LHS is increasing while RHS remains same)They also asked me one
more question on fluid which they linked with the design afterwards (although I
didn’t wrote design in my favourite subjects).
They kept on providing hints in
the whole interview which lasted for one hour.