BARC-2015 written exam question Paper

Please comment your answer, corrections and other questions of BARC-2015 exam

1- K type thermocouple is made up of ?

     (ans: K-type is Chromel - Alumel & E type is Chromel-Constantan)

2- which controller gives maximum offset?

      (ans: P controller)

3- which controller has maximum gain ?

      (ans: PID controller)

4- what will be slope of q line when feed is 40% vapour ?

     (ans: -1.5)

5- what will be mole fraction of benzene in vapour phase when vapour pressure of benzene is 3 atm and toluene is 4/3 atm, and mole fraction of benzene in liquid phase is .4 ?

     (ans: 0.6)

6- which one of the following shows ultimate analysis ?

7- in which heat transfer coefficient will be high ?

     (case 1- cooling from 80 to 30 centigrade. case 2- heating from 30 to 80 centigrade.)

8- Biot no is defined as ?

9- Nusselt no. is defined as ?

10-Prandtl no. is defined for non ideal reactor as ?

11- which no is defined as the ratio of temperature difference at wall to the overall temperature difference ?

      (ans: Nusselt no.)

12- what is the dispersion no. of ideal PFR ?

       (ans: 0)

13- what will be outlet concentration of absorption column if column efficiency is 50% and     inlet gas composition is 0.1 and equilibrium relation is y*=x , pure water is used as solvent and gas to liquid ratio is 2.

14- alloy which contains 69% nickel is called ?

       (ans: monel)

15- Chromel is alloy of which of following ?

       (ans: 90% nickel & 10% chromium)

16- Toughness of material is area under the curve of ....... and strain.

        

17- In 10% Oleum has 10% free ?

       (ans: SO3)

18- A system shows negative gain margin it means system is ?

       (options 1-stable, 2- unstable, 3-Critically stable, 4- not)

19- How the rate of drying effects when Nitriding of surface take place ?

20- What will be degree of freedom when condensation of steam is done in air atmosphere ?

21- What is the temperature profile of cylinder when heat transfer from inside to outside ?

22-The ratio of diffusivity of liquid and gas is the order of following ?

23-The boundary between liquid and Solid+ liquid region of phase diagram is called ?

       (ans: Liquidus, Ref. NPTEL)

24-which of the following system is unstable ?

      (Options: 1-AR<1 & ф=-90, 2- AR<1 ф=-180, 3-AR<1 ф=-270, 4- none of above)

25-What will be thickness of insulation when required outside temperature is 50 C (K of         material=.12 W/m.K). If the inside temperature is 800 and outside temperature is 450 C       of wall amd thermal conductivity is 10 W/mK ?

26- What will be conversion of CSTR whem rate expression is 0.5C² . the inlet concentration is 1 mol/m3 and molar flow  rate is 5 mol/ltr and volume of reactor is 100 ltr ?

27-Statement on second law of thermodynamics ?

28-What is the velocity of water flowing in pipe if stagnation pressure is 7.83 bar and static   pressure is 6 bar, the flow coefficient is 0.97 ?

29-Condensation no. is defined as the ration of ?

30-What will be the ration of heat transfer coefficient with fin and without fin ?

       (Options: 1-<1 2->1, 3=1  4-none of the above)

31-What happens in the region of transition boiling (h is proportional to T to power n, what   is the value of n) ?

      (options: 1-=0, 2-<0, 3->0, 4->>1)

32-Capillary number is the ratio of ?

      (ans: viscous forces to the surface tension forces)

33-Steady state equilibrium temperature reached by adiabatically cooled thermometer in huge amount of air is called ?

34-Thiele mudulus is defined as (It is the ratio of) ?

      (Thiele modulus and is the ratio of the intrinsic chemical reaction rate in the absence of mass transfer limitation to the rate of diffusion through the particle. )

35-Pipe nominal diameter refers to ?
      (Outer dia)

36-For equal percentage valve the relation between flow and valve stem position is related as ?
         (F=Fo(x)^(1-x))