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CHEMICAL ENGINEERING GATE 2003
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 HEAT TRANSFER 0%
 INSTRUMENTATION 0%
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Question 1 of 90
1. Question
1 pointsCategory: MATHEMATICSA box contains 6 red balls and 4 green balls, one ball is randomly picked and then a second ball is picked without replacement of the first ball. The probability that both the balls are green is :–
Correct
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1ST EXPLANATION

Question 2 of 90
2. Question
1 pointsCategory: MATHEMATICSThe directional derivative of f (x, y, z) = x² + y² + z² at the point (1, 1, 1) in the direction i – k is
Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 3 of 90
3. Question
1 pointsCategory: MATHEMATICSThe Taylor series expansion of the function : F(x) = x / (1 + x) around x = 0 is
Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 4 of 90
4. Question
1 pointsCategory: THERMODYNAMICSFor estimation of heat capacity of a solid compound, one can use
Correct
Incorrect

Question 5 of 90
5. Question
1 pointsCategory: THERMODYNAMICSFor organic compounds, Group Contribution Method can be used for estimation of
Correct
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Question 6 of 90
6. Question
1 pointsCategory: THERMODYNAMICSWhen dilute aqueous solutions of two salts are mixed, the process is associated with
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Question 7 of 90
7. Question
1 pointsCategory: THERMODYNAMICSIn Joule’s experiments, an insulated container contains 20 kg of water initially at 25ºC. It is stirred by an agitator, which is made to turn by a slowly failing body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 m s2. Neglecting the heat capacity of agitator, the temperature of water (inºC) is
Correct
1ST EXPLANATION
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1ST EXPLANATION

Question 8 of 90
8. Question
1 pointsCategory: THERMODYNAMICSOne mole of Nitrogen at 8 bar and 600 K is contained in a pistoncylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is :–
Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 9 of 90
9. Question
1 pointsCategory: THERMODYNAMICSFor water at 300 ºC, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa. Under these conditions, one mole of water in liquid phase has a volume 25.28 cm³, and that in vapour phase 391.1 cm³. Fugacity of water (in kPa) at 9000 kPa will be
Correct
1ST EXPLANATION
Incorrect
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Question 10 of 90
10. Question
1 pointsCategory: FLUID MECHANICSA lubricant 1000 times more viscous than water would have a viscosity (in Pas)
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1ST EXPLANATION
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Question 11 of 90
11. Question
1 pointsCategory: FLUID MECHANICSThe velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is
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1ST EXPLANATION
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Question 12 of 90
12. Question
1 pointsCategory: MECHANICAL OPERATIONSEnergy requirement (per unit mass of material crushed/ground) is highest for
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Question 13 of 90
13. Question
1 pointsCategory: HEAT TRANSFERThree solid objects of the same material and of equal mass – a sphere, a cylinder (length = diameter) and a cube – are at 500ºC initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change of temperature is smallest for
Correct
1ST EXPLANATION
Incorrect
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Question 14 of 90
14. Question
1 pointsA dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed because :–
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Question 15 of 90
15. Question
1 pointsCategory: HEAT TRANSFERThe units of resistance to heat transfer are :–
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Question 16 of 90
16. Question
1 pointsCategory: MASS TRANSFERThe diffusion coefficient, in m²/s, of Acetic acid in Benzene (liquid in liquid) is
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Question 17 of 90
17. Question
1 pointsCategory: MASS TRANSFERComponent A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular diffusion if
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Question 18 of 90
18. Question
1 pointsCategory: MASS TRANSFERMinimum reflux ratio in a distillation column results in
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Question 19 of 90
19. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGFor a series of reactions having k1 << k2, the reaction system can be approximated as
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Question 20 of 90
20. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGAn elementary liquid phase decomposition reaction A → B is to be carried out in a CSTR. The design equation is
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Question 21 of 90
21. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGFind a mechanism that is consistent with the rate equation and reaction given below
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Question 22 of 90
22. Question
1 pointsCategory: INSTRUMENTATIONMatch the measured process variables with the list of measuring devices given below :
Measured process variables with the list of measuring devices given below :
Measured process variables Measuring devices
P Temperature 1. Bourdon tube element
Q Pressure 2. Orifice plates
R Flow 3. Infrared analyzer
S Liquid level 4. Displacer devices
T Composition 5. PyrometerCorrect
Incorrect

Question 23 of 90
23. Question
1 pointsCategory: PROCESS CONTROLSuppose that the gain, time constant, and dead time of a process with the following transfer function
are known with a possible error of + 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated by taking the value of process gain, time constant and dead time as
Correct
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Question 24 of 90
24. Question
1 pointsCategory: PROCESS CONTROLWater is flowing through a series of four tanks and getting heated as shown in Figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the Tank 4 as thee is a disturbance in the temperature of a second stream entering the Tank 2. Select the best place to take the secondary measurement for the secondary loop.
Correct
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Question 25 of 90
25. Question
1 pointsCategory: ECONOMICSDirect costs component of the fixed capital consists of
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Question 26 of 90
26. Question
1 pointsCategory: ECONOMICSA series of equal payments (e.g. deposit or cost) made at equal intervals of time is known as
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Question 27 of 90
27. Question
1 pointsCategory: ECONOMICSThe variables required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are –
P) inlet pressure Q) compressor RPM
R) delivery pressure S) volumetric flow rate at inletCorrect
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Question 28 of 90
28. Question
1 pointsCategory: CHEMICAL TECHNOLOGY‘Nylon 66’ is so named because
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Question 29 of 90
29. Question
1 pointsCategory: CHEMICAL TECHNOLOGYThe catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between
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Question 30 of 90
30. Question
2 pointsCategory: CHEMICAL TECHNOLOGYThe composition of fresh feed to the high temperature high pressure urea autoclave is
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Question 31 of 90
31. Question
2 pointsCategory: MATHEMATICSThe range of values for a constant ‘K’ to yield a stable system in the following set of time dependent differential equations is
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Question 32 of 90
32. Question
2 pointsCategory: MATHEMATICSThe value of y as t → ∞ for the following differential equation for an initial value of y (1) = 0 is
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Question 33 of 90
33. Question
2 pointsCategory: MATHEMATICSThe equilibrium data of component A in the two phases B and C are given below :
The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = m X² for the above data is
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Question 34 of 90
34. Question
2 pointsCategory: MATHEMATICSThe most general complex analytical function f (z) = u (x, y) + iv (x, y) for u = x² – y² is
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Question 35 of 90
35. Question
2 pointsCategory: MATHEMATICSThe fluid element has a velocity . The motion at (x, y) = is
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Question 36 of 90
36. Question
2 pointsCategory: MATHEMATICSThe differential equation , will have a solution of the form
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Question 37 of 90
37. Question
2 pointsCategory: MATHEMATICSFind the Laplace transform of the following input function shown in Figure.
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Question 38 of 90
38. Question
2 pointsCategory: PROCESS CALCULATIONS6 g of carbon is burnt with an amount of air containing 18 g oxygen. The product contain 16.5 g CO2 and 2.8 g CO besides other constituents. What is the degree of conversion on the basis of disappearance of the limiting reactant ?
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Question 39 of 90
39. Question
2 pointsCategory: PROCESS CALCULATIONSAn aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is
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Question 40 of 90
40. Question
2 pointsCategory: MASS TRANSFERAir at a temperature of 20ºC & 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity ? Vapour pressure of water at 20ºC is 17.5 mm Hg.
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Question 41 of 90
41. Question
2 pointsCategory: PROCESS CALCULATIONSNa2SO4.10 H2O crystals are formed by cooling 100 kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is
Correct
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Incorrect
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Question 42 of 90
42. Question
2 pointsCategory: PROCESS CALCULATIONSA sample of natural gas containing 80% Methane (CH4 ) and the rest Nitrogen (N2 ) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO the Orsat analysis in volume percent is
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Question 43 of 90
43. Question
2 pointsCategory: PROCESS CALCULATIONSHeat capacity of air can be approximately expresses as Cp = 26.693 + 7.365 x 10³ T where Cp is in J/(mol)(K) and T is in K. The heat given off by 1 mole of air when cooled at 1 atmospheric pressure from 500ºC to 100ºC is
Correct
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Question 44 of 90
44. Question
2 pointsCategory: THERMODYNAMICSA solid metallic block weighing 5 kg has an initial temperature of 500ºC ; 40 kg of water initially at 25ºC is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ kg¹ K¹. Ignoring the effect of expansion and contraction, and also the heat capacity of tank, the total entropy change in kJ kg¹ K¹is
Correct
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Question 45 of 90
45. Question
2 pointsCategory: THERMODYNAMICSThe following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperatures. The rate at which heat is absorbed from the hot reservoir is
Correct
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Question 46 of 90
46. Question
2 pointsCategory: THERMODYNAMICSA steam turbine operates with a superheated steam flowing at 1 kg s¹. This steam is supplied at 441 bar and 500 ºC, and discharges at 1.01325 bar and 100 ºC.
The maximum power output (in kW) will be
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Question 47 of 90
47. Question
2 pointsCategory: THERMODYNAMICSAt 60ºC, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60ºC exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole factions of methanol are 0.1686 and 0.5714 respectively. Activity coefficient of methanol is
Correct
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Question 48 of 90
48. Question
2 pointsCategory: MASS TRANSFEROne kg of saturated steam at 100 ºC and 1.01325 bar is contained in a rigid walled vessel. It has a volume 1.673 m³. It cools to 98 ºC, the saturation pressure is 0.943 bar; one kg of water vapour under these conditions has a volume of 1.789 m³.
48) The amount of water vapour condensed (in kg) isCorrect
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Question 49 of 90
49. Question
2 pointsCategory: MASS TRANSFEROne kg of saturated steam at 100 ºC and 1.01325 bar is contained in a rigid walled vessel. It has a volume 1.673 m³. It cools to 98 ºC, the saturation pressure is 0.943 bar; one kg of water vapour under these conditions has a volume of 1.789 m³.
49) The latent heat of condensation (kJ kg ¹) under these conditions is
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Question 50 of 90
50. Question
2 pointsCategory: FLUID MECHANICSA pipe has a porous section of length L as shown in the figure. Velocity at the start of this section is Vo. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q (x/L)², what will be the axial velocity in the pipe at any x? Assume incompressible onedimensional flow i.e., no gradients in the radial direction.
Correct
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Question 51 of 90
51. Question
2 pointsCategory: FLUID MECHANICSA centrifugal pump is used to pump water through a horizontal distance of 150 m and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D. of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³ /s? The Fanning friction factor, f is 0.0062
Correct
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Incorrect
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Question 52 of 90
52. Question
2 pointsCategory: FLUID MECHANICSMatch the following dimensionless numbers with the appropriate ratio of forces
Dimensionless Number Ratio of forces
P Froude Number 1. Shear force / inertial force
Q Reynolds Number 2. Convective heat transfer/conductive heat transfer
R Friction factor 3. Inertial force/viscous fource
S Nusselt Number 4. Inertial force/viscous force
5 Inertial force/gravitational forceCorrect
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Question 53 of 90
53. Question
2 pointsCategory: FLUID MECHANICSA bed of spherical particles (sp. Gr. 2.5) of uniorm size 1500 μm is 0.5 in diameter and 0.5 m high . In the packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above particle –fluid system (in SI) units is given below :
53.) If water is to be used as the fluidizing medium, the minimum fluidization velocity, VOM is
Correct
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Question 54 of 90
54. Question
2 pointsCategory: FLUID MECHANICSA bed of spherical particles (sp. Gr. 2.5) of uniorm size 1500 μm is 0.5 in diameter and 0.5 m high . In the packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above particle –fluid system (in SI) units is given below :
54.) In actual operation, the above bed has a beight = 1 m. What is the porosity of the fluidized bed ?
Correct
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Question 55 of 90
55. Question
2 pointsCategory: FLUID MECHANICSThe basic filtration equation is given as Where V is volume of the filtrate, A is the filtration area; α is specific cake resistance,μ is viscosity of the filtrate, and C is the concentration of solids in the feed slurry.
In a 20 min. constant rate filtration, 5 m³ of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes will it take for another 5 m³ of filtrate to be produced ? Neglect filter medium resistance, Rmi assume incompressible cakeCorrect
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Question 56 of 90
56. Question
2 pointsCategory: FLUID MECHANICSA process stream of dilute aqueous solution flowing at the rate of 10 kg s¹ is to be heated. Steam condensate at 95ºC is available for heating purpose, also at a rate of 10 kg s¹. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is
Correct
Incorrect

Question 57 of 90
57. Question
2 pointsCategory: HEAT TRANSFERThe inner wall of a furnace is at a temperature of 700 ºC. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W m¹ ºC¹ respectively. The ambient air is at 30 ºC and the heat transfer coefficient between the outer surface of wall and air is 20 W m² ºC¹. The rate of heat loss from the outer surface in W m² is
Correct
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Question 58 of 90
58. Question
2 pointsCategory: HEAT TRANSFERSteam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the hat. Heat transfer coefficient for the cooling water, whether on shell side or tube side, is made. The best arrangement is
Correct
Incorrect

Question 59 of 90
59. Question
2 pointsCategory: FLUID MECHANICSA fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer coefficient for turbulent flow conditions is proportional to
Correct
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Question 60 of 90
60. Question
2 pointsCategory: HEAT TRANSFERAir is to be heated by condensing steam. Two heat exchangers are available : (i) a shell and tube heat exchanger, and (ii) a finned tube heat exchanger. Tube side heat transfer area is equal in both cases. The recommended arrangement is
Correct
Incorrect

Question 61 of 90
61. Question
2 pointsCategory: HEAT TRANSFERFor a given ambient air temperature with increase in the thickness of insulation of a hot cylindrical pipe, the rate of heat loss from the surface would
Correct
Incorrect

Question 62 of 90
62. Question
2 pointsCategory: MASS TRANSFERExperiments were conducted to determine the flux of a species A in a stagnant medium across a gasliquid interface. The overall mass transfer coefficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10³ kg.mol/m² s . The equilibrium data for the sytem is given as y = 2x. The flux across the interface (in kg mol/m² s ) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01, respectively is
Correct
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Question 63 of 90
63. Question
2 pointsCategory: MASS TRANSFERH2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data given by y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by y = 5 x + 0.001 is
Correct
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Incorrect
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Question 64 of 90
64. Question
2 pointsCategory: MASS TRANSFERThe Reynolds Number of the liquid was increased 100 fold for a laminar falling film used for gasliquid contacting. Assuming penetration theory is applicable, the fold – increase in the mass transfer coefficient (ke) for the same system is
Correct
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Question 65 of 90
65. Question
2 pointsCategory: MASS TRANSFERA pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is
Correct
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Question 66 of 90
66. Question
2 pointsCategory: MASS TRANSFERA solid is being dried in the linear drying rate regime from moisture content X0 to XF . The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture, X0. The drying time for M = (LS/LC) is
where LS : total mass of dry solids, A : total surface area for drying, RC : constant maximum drying rate per unit area, and X : moisture content (in mass of water/mass of dry solids)
Correct
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Question 67 of 90
67. Question
2 pointsCategory: MASS TRANSFERThe following plot gives the saturated humidity (He) versus Temperature (T)
Line joining (HI, TI) and (H2, T2) is the constant enthalpy line. Choose the correct one from among the alternatives A, B, C and D
Correct
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Question 68 of 90
68. Question
2 pointsCompound A is extracted from a solution of A + B into a pure solvent S. A cocurrent unit is used for the liquid–liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr m²and the solvent flow rate is 400 moles of S/hr m². The equilibrium data is represented by Y = 3 X² where Y is in moles of A/moles of B and X is in moles of A/moles of S. The maximum percentage extraction achieved in the unit is
Correct
Incorrect

Question 69 of 90
69. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGA CSTR is to be designed in which an exothermic liquid phase first order reaction of the type A → R is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given
CA0 = 5 kmol/m³ ; XA = 0.5; feed temperature = reactor temperature = 40 ºC; rate constant at 40 ºC = 1 min¹ (ΔH) = 40 kJ/mol; ρ = 1000 kg/m³; Cp = 4 J/gm ºC; q = 10³ m³ /min (ρ and Cp are same for the reactant and product streams). The amount of heat to be removed isCorrect
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Question 70 of 90
70. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGA liquid phase reaction is to be carried out under isothermal conditions. The reaction rate as a function of conversion has been determined experimentally and is shown in Figure given below. What choice of reactor or combination of reactors will require the minimum overall reactor volume, if a conversion of 0.9 is desired ?
Correct
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Question 71 of 90
71. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGThe following gas phase reactions are carried out isothermally in a CSTR
A → 2R , r1 = k1pA , k1 = 20 mol/(sec.m³ bar)
A → 3S , r2 = k2pA , k2 = 40 mol/(sec.m³ bar)
Total pressure = 1 bar; FA0 = 1 mol/sec; feed is pure A
What is the maximum possible value of FR (mol/sec) ?Correct
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Question 72 of 90
72. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGThe following gas phase reactions are carried out isothermally in a CSTR
A → 2R , r1 = k1pA , k1 = 20 mol/(sec.m³ bar)
A → 3S , r2 = k2pA , k2 = 40 mol/(sec.m³ bar)
Total pressure = 1 bar; FA0 = 1 mol/sec; feed is pure AThe volume of a CSTR required for a fractional conversion of A equal to 0.3 due to the first reaction is
Correct
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Question 73 of 90
73. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGA step input tracer test is used to explore the flow pattern of fluid through a vessel of total volume equal to 1 m³ having a feed rate of 1 m³ /min.
Identify for each curve in Group 1 a suitable flow model from the list given under Group 2
Group 1 Group 2
P Curve 1 1 PFR and CSTR in series
Q Curve 2 2 CSTR with dead space
3 PFR in series with a CSTR and dead space
4 CSTRCorrect
Incorrect

Question 74 of 90
74. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGFollowing isothermal kinetic data are obtained in a busket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes.
Correct
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Question 75 of 90
75. Question
2 pointsCategory: FLUID MECHANICSThe pressure differential across a vertical venturimeter (shown in Figure) is measured with the help of a mercury manometer to estimate flow rate of water flowing through it. The expression for the velocity of water at the throat is
Correct
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Question 76 of 90
76. Question
1 pointsCategory: PROCESS CONTROLWater is entering a storage tank at a temperature To and flow rate Qo and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. L The area of cross section of the tank is Ac. The model that describes the dynamic variation of water temperature in the tank with time is given as
Correct
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Incorrect
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Question 77 of 90
77. Question
2 pointsCategory: PROCESS CONTROLFind the ultimate gain and frequency for a proportional controller in the case of a process having the following transfer function.
Correct
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2ND EXPLANATION
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2ND EXPLANATION

Question 78 of 90
78. Question
2 pointsCategory: PROCESS CONTROLCorrect
Incorrect

Question 79 of 90
79. Question
2 pointsCategory: PROCESS CONTROLIn the case of a feed forward control scheme, which of the following is NOT true?
1 It is insensitive to modeling errors
2 Cannot cope with unmeasured disturbances
3 It waits until the effect of the disturbance has been felt by the system before control action is taken
4 Requires good knowledge of the process model
5 Requires identification of all possible disturbances and their direct MeasurementCorrect
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Question 80 of 90
80. Question
2 pointsCategory: PROCESS CONTROLTemperature control of a exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
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Question 81 of 90
81. Question
2 pointsCategory: ECONOMICSTwo pumps under consideration for installation at a plant have the following capital investment and salvage values. Pump A: C1 = Rs. 40,000, Csal = Rs. 3,900. Pump B : C1 = Rs. 50,000, Csal = Rs. 20,000. Using capitalized cost, determine what should be the common life of the pumps for both to be competitive (economically equivalent). Interest rate is 10 % per annum. Maintenance and operational costs are negligible.
Correct
1ST EXPLANATION
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1ST EXPLANATION

Question 82 of 90
82. Question
2 pointsCategory: ECONOMICSA process has fixed capital investment of Rs. 150 lakhs, working capital Rs. 30 lakhs and salvage value zero. Annual revenues from sales are Rs. 250 lakhs, manufacturing costs 145 lakhs and other expenses 10% of the revenue. Assume project life span of 11 years, tax life of 5 years and interest rate to be 10%. Tax rate is 40% and straight line depreciation, i.e. 20% per year, is applicable.
82.) Discounted value (to percent time) of the profit before tax (for the total plant life period) in rupees isCorrect
1ST EXPLANATION
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1ST EXPLANATION

Question 83 of 90
83. Question
2 pointsCategory: ECONOMICSA process has fixed capital investment of Rs. 150 lakhs, working capital Rs. 30 lakhs and salvage value zero. Annual revenues from sales are Rs. 250 lakhs, manufacturing costs 145 lakhs and other expenses 10% of the revenue. Assume project life span of 11 years, tax life of 5 years and interest rate to be 10%. Tax rate is 40% and straight line depreciation, i.e. 20% per year, is applicable.
83.) Discounted value of the depreciation benefit over the tax life in rupees is
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Question 84 of 90
84. Question
2 pointsCategory: MASS TRANSFERIn distillation column sizing calculations by short cut methods, match the following
P Underwood’s Equation 1 Number of real trays
Q Fenske’s Equation 2 Column diameter
R Gilliland’s Equation 3 Minimum number of ideal trays
S Vapour velocity at flooding 4 Actual number of ideal trays
5 Minimum reflux ratio
6 Tray efficiencyCorrect
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Question 85 of 90
85. Question
2 pointsCategory: CHEMICAL TECHNOLOGYIdentify the group in which all the polymers mentioned can be used to make fibers
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Question 86 of 90
86. Question
2 pointsCategory: CHEMICAL TECHNOLOGYThe preferred reacting system for oxidation of oxylene to phthalic anhydride is
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Question 87 of 90
87. Question
2 pointsCategory: CHEMICAL TECHNOLOGYMatch the items in Group 1 with the items in Group 2
Group – 1 Group – 2
P Calcium ammonium nitrate 1 Fertilizer industry
Q CaCl2 – NaCl liquor 2 Paper and Pulp industry
3 Soda ash industryCorrect
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Question 88 of 90
88. Question
2 pointsCategory: CHEMICAL TECHNOLOGYGroup – 1 Group – 2
P Black liquor 1 Petroleum refining
Q Activated silica alumina 2 Sugar factory
R Press mudCorrect
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Question 89 of 90
89. Question
2 pointsCategory: CHEMICAL TECHNOLOGYIn a refinery, petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction.
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Question 90 of 90
90. Question
2 pointsCategory: CHEMICAL TECHNOLOGYThe order of preference for feedstock to a catalytic reformer is
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0sincostansin^{1}cos^{1}tan^{1}πex^{y}x^{3}x^{2}e^{x}10^{x}^{y}√x^{3}√x√xlnlog()1/x%n!789+MS456–M+123×M0.EXP÷MR±RNDC=MC 
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