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Question 1 of 65
1. Question
1 pointsCategory: APTITUDE“In spite of being warned repeatedly, he failed to correct his __________ behavior”. The word that best fills the blank in the above sentence is
Correct
Inspite of being warned repeatedly shows negativity – only negative word in options is errant .
errant – offending , misbehaving
rational – based on or in accordance with reason or logic.
reasonable having sound judgement; fair and sensible.
Incorrect
Inspite of being warned repeatedly shows negativity – only negative word in options is errant .
errant – offending , misbehaving
rational – based on or in accordance with reason or logic.
reasonable having sound judgement; fair and sensible.

Question 2 of 65
2. Question
1 pointsCategory: APTITUDE(x2)² = 2x1 , find the minimum value of x, satisfying the given condition.
Correct
CHECK OPTIONS.. 5 IS NOT GIVEN ..SO 1 IS THE ANSWER .. NOT NEED TO CHECK DOUBLE DERIVATIVE FOR WHICH PINT IS MINIMA OR WHICH IS MAXIMA
Incorrect
CHECK OPTIONS.. 5 IS NOT GIVEN ..SO 1 IS THE ANSWER .. NOT NEED TO CHECK DOUBLE DERIVATIVE FOR WHICH PINT IS MINIMA OR WHICH IS MAXIMA

Question 3 of 65
3. Question
1 pointsCategory: APTITUDEArrange the following threedimensional objects in the descending order of their volumes:
(i) A cuboid with dimensions 10 cm. 8 cm and 6 cm
(ii) A cube of side 8 cm
(iii) A cylinder with base radius 7 cm and height 7 cm
(iv) A sphere of radius 7 cmCorrect
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 4 of 65
4. Question
1 pointsCategory: APTITUDEThe area of an equilateral triangle is √3 . What is the perimeter of the triangle?
Correct
1ST EXPLANATION
Area of equilateral triangle = √3/4 ×(side)²
(Side=2)
Perimeter
= 3×2 = 62ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
Area of equilateral triangle = √3/4 ×(side)²
(Side=2)
Perimeter
= 3×2 = 62ND EXPLANATION
3RD EXPLANATION

Question 5 of 65
5. Question
1 pointsCategory: APTITUDEFor 0 ≤x ≤ 2π ,sin x and cos x are both decreasing functions in the interval ________.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 6 of 65
6. Question
2 pointsCategory: APTITUDETo pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 candidates. Question B was answered correctly by 2,50,000 candidates. Question C was answered correctly by 2,60,000 candidates. Both questions A and B were answered correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. If the number of students answering all questions correctly is the same as the number answering none, how many candidates failed to clear the test?
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 7 of 65
7. Question
1 pointsIn a detailed study of annual crow births in India, it was found that there was relatively no growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another unrelated study, it was found that the revenue from cracker sales in India which remained fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006.The solid line in the graph below refers to annual sale of crackers and the dashed line refers to the annual crow births in India. Choose the most appropriate inference from the above data.
Correct
1ST EXPLANATION
From the given graph; it is clear that there is a strong correlation between crow birth and cracker sales
2ND EXPLANATION
Incorrect
1ST EXPLANATION
From the given graph; it is clear that there is a strong correlation between crow birth and cracker sales
2ND EXPLANATION

Question 8 of 65
8. Question
1 pointsCategory: APTITUDECorrect
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 9 of 65
9. Question
1 pointsAn automobile travels from city A to city B and returns to city A by the same route. The speed of the vehicle during the onward and return journeys were constant at 60 km/h and 90 km/h, respectively. What is the average speed in km/h for the entire journey?
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 10 of 65
10. Question
1 pointsCategory: APTITUDEA set of 4 parallel lines intersect with another set of 5 parallel lines, How many parallelograms are formed?
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 11 of 65
11. Question
1 pointsA venturimeter is installed to measure the flow rate of water in a 178 mm diameter (ID)pipe. The throat diameter is 102 mm. The differential pressure measured using a manometer is 154.3 kN/m² . The data given are: discharge coefficient = 0.98; water density = 1000 kg/m³ . The volumetric flow rate of water in m³/s is ________.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 12 of 65
12. Question
1 pointsCategory: PROCESS CALCULATIONSThe ammonia (NH3) oxidation process occurs over a catalyst as 4NH3 + 5O2 → 6H2O + 4NO . Air is supplied such that oxygen (O2) is 20% in excess of that required for complete conversion of NH3 . The mole fraction of O2 in inlet gas mixture (NH3 + air) is _________ (rounded off to third decimal place)
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 13 of 65
13. Question
1 pointsCategory: MECHANICAL OPERATIONSCritical speed of a ball mill depends on
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 14 of 65
14. Question
1 pointsCategory: THERMODYNAMICSConsider the following properties:
(P) temperature (Q) specific gravity (R) chemical potential (S) volume
The option which lists ALL the intensive properties isCorrect
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 15 of 65
15. Question
1 pointsCategory: CHEMICAL TECHNOLOGYThe molecular formula of the predominant chemical compound in commercial sugar is
Correct
Incorrect

Question 16 of 65
16. Question
1 pointsCategory: THERMODYNAMICSFor a chemical reaction. the ratio of rate constant at 500 K to that at 400 K is 2.5. Given R= 8.314 J mol¹K¹ , the value of activation energy (in kJ/mol) is
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 17 of 65
17. Question
1 pointsCategory: CHEMICAL TECHNOLOGYIn connection with petroleum refining, identify the incorrect statement among the following options.
Correct
Cetane number indicates the quality of diesel
Incorrect
Cetane number indicates the quality of diesel

Question 18 of 65
18. Question
1 pointsCategory: CHEMICAL TECHNOLOGYChoose the correct statement
In viscose rayon manufacturing process,Correct
Incorrect

Question 19 of 65
19. Question
1 pointsCategory: MATHEMATICSA watch uses two electronic circuits (ECs). Each EC has a failure probability of 0.1 in one year of operation. Both ECs are required for functioning of the watch. The probability of the watch functioning for one year without failure is
Correct
1ST EXPLANATION
0.9×0.9 = 0.81
2ND EXPLANATION
Incorrect
1ST EXPLANATION
0.9×0.9 = 0.81
2ND EXPLANATION

Question 20 of 65
20. Question
1 pointsCategory: MASS TRANSFERAccording to the surface renewal theory, the unit of fractional rate of surface renewal is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 21 of 65
21. Question
1 pointsCategory: MASS TRANSFERTwo packed towers are designed for the same mass velocity of the gas. The first has liquid and gas flow rates of 30 kg/s and 1.2 kg/s, respectively, while the corresponding flow rates in the second tower are 67.5 kg/s and 1.8 kg/s. The ratio of the design diameter of the wider tower to that of the narrower tower is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 22 of 65
22. Question
1 pointsThe initial water level in a tank is 4 m. When the valve located at the bottom is opened, therate of change of water level (L) with respect to time (t) is The level of water (in m) in the tank at time 0.5 s after opening the valve is____________ (rounded off to second
decimal place).Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 23 of 65
23. Question
1 pointsCategory: PROCESS CONTROLA first–order process having a transfer function, is controlled by a proportional controller with gain of 3.2. The process time constant is in minutes. Addition of the integral control action with an integral time constant of 5 minutes leads to increase in
Correct
1ST EXPLANATION
On adding of PI controller the overall system order will increase.
If an integral controller is added, it will increase the order of a closed loop system.Option (C) is correct
2ND EXPLANATION
Incorrect
1ST EXPLANATION
On adding of PI controller the overall system order will increase.
If an integral controller is added, it will increase the order of a closed loop system.Option (C) is correct
2ND EXPLANATION

Question 24 of 65
24. Question
1 pointsCategory: CHEMICAL TECHNOLOGYPolyvinyl chloride is produced by
Correct
PVC follows addition type kinetics and formed by reacting ethylene and chlorine
Incorrect
PVC follows addition type kinetics and formed by reacting ethylene and chlorine

Question 25 of 65
25. Question
1 pointsCategory: HEAT TRANSFERSegmental baffles in a 2–4 shell and tube heat exchanger
Correct
1ST EXPLANATION
Because battle will increase turbulence in shell side & will increase HTC in shell side
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Because battle will increase turbulence in shell side & will increase HTC in shell side
2ND EXPLANATION

Question 26 of 65
26. Question
1 pointsCategory: MATHEMATICSConsider the following two equations:
The above set of equations is represented byCorrect
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 27 of 65
27. Question
1 pointsCategory: PROCESS CALCULATIONSThe reactant (M) is converted into product (N) in the presence of the catalyst in a fixed bed reactor. All
the flow rates (F, G, H, P, and R) in mol/s, and mole fraction of reactant (M) in these streams
(xF, xG, xH, xP and xR) are shown in the diagram.Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 28 of 65
28. Question
1 pointsCategory: FLUID MECHANICSPitot tube is used to measure
Correct
A Pitot tube is a device widely used in fluid dynamics for measuring the rate of flow of gases or liquids. For liquids, the device used is generally a manometer, with one open end facing upstream and the other end out of the stream. The different pressures at the two ends cause a liquid to shift position within the two arms of the tube. For gases, a Pitot tube is generally Lshaped, with one end open and pointing towards the flow of gas and the other end connected to a pressuremeasuring device. This compares the pitottube pressure with the static stream pressure, the difference being a measure of the fluid velocity. This type of pitot tube is commonly used as an airspeed indicator in aircraft.
Incorrect
A Pitot tube is a device widely used in fluid dynamics for measuring the rate of flow of gases or liquids. For liquids, the device used is generally a manometer, with one open end facing upstream and the other end out of the stream. The different pressures at the two ends cause a liquid to shift position within the two arms of the tube. For gases, a Pitot tube is generally Lshaped, with one end open and pointing towards the flow of gas and the other end connected to a pressuremeasuring device. This compares the pitottube pressure with the static stream pressure, the difference being a measure of the fluid velocity. This type of pitot tube is commonly used as an airspeed indicator in aircraft.

Question 29 of 65
29. Question
1 pointsT he Annual Fixed Charges (AFC) and Annual Utilities Costs (AUC) of a distillation column being designed are expressed in terms of the reflux ratio (R) as
The reflux ratio (Ropt) for optimizing the total cost of the distillation column may be found by solving
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 30 of 65
30. Question
1 pointsCategory: MECHANICAL OPERATIONSThe terminal velocity of a spherical particle in gravitational settling under Stokes’ regime varies
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 31 of 65
31. Question
1 pointsCategory: MATHEMATICSThe figure which represents y = (sin x)/x (x in radians) is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 32 of 65
32. Question
1 pointsCategory: HEAT TRANSFEREconomy of evaporators used for concentrating sugarcane juice is
Correct
Incorrect

Question 33 of 65
33. Question
1 pointsCategory: MATHEMATICST he fourth order RungeKutta (RK4) method to solve an ordinary differential equation is given as
For a special case when the function f depends solely on x, the above RK4 method reduces to
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 34 of 65
34. Question
2 pointsCategory: MASS TRANSFERFor absorption of H2S from a mixture with hydrocarbon vapour into an aqueous alkanolamine solution, the liquid phase mass transfer resistance is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 35 of 65
35. Question
2 pointsCategory: MASS TRANSFERL iquid phase isomerization of oxylene to pxylene using a zeolite catalyst was carried out in a CSTR. Three sets of kinetic data at different temperatures and stirring speeds were obtained as shown below.
The operating condition at which the reaction rate is not controlled by external mass transfer resistance is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 36 of 65
36. Question
1 pointsCategory: HEAT TRANSFERThe wall of a pipe of radius 1 in is at a uniform temperature of 200ºC, and is covered by insulation of thickness 0.1 m. The ambient air outside the insulated pipe is at 20ºC and has heat transfer coefficient of 10 Wm²K¹ . The thermal conductivity of the insulation material is 0.05 W m¹ K¹ . If the heat transfer occurs at steady state, the temperature (inºC) of the outer surface of insulation is ___________ (rounded off to second decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 37 of 65
37. Question
1 pointsIn a roll crusher, rolls of diameter 1 m each are set in such a manner that minimum clearance between the crushing surfaces is 15 mm. If the angle of nip is 31º, the maximum diameter of the particle (in mm) which can be crushed is ______________ (rounded off to third decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 38 of 65
38. Question
2 pointsCategory: PROCESS CONTROLF or a closedloop system, consider the following transfer functions: process Gp(s), controller Gc(s), measuring device Gm(s), and final control element Gf(s)
The offset in the closed loop response due to a unit step change introduced in the set point of the output variable is ________.
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 39 of 65
39. Question
2 pointsCategory: FLUID MECHANICSThe volume of liquid filled in a spherical storage tank of radius R is computed from height of liquid, h, in the outside tube (neglecting the volume of liquid in the outside tube) as
The estimate of liquid height (in m) to store V=30 m³ of water in R = 3 m tank, after performing ONE iteration of Secant method, using 1 m and 3 m as two initial guesses of liquid height is _____________ (rounded off to second decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 40 of 65
40. Question
1 pointsCategory: MATHEMATICSCorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 41 of 65
41. Question
1 pointsCategory: THERMODYNAMICSAn azeotropic mixture of ethanol and water is to be separated in a distillation column using benzene as an entrainer. At the column operating conditions, two liquid phases are formed on a tray. The degree(s) of freedom of the system for the choice of intensive properties at equilibrium is(are) ____________.
Correct
1ST EXPLANATION
F =C – P+ 2r – s
r = 0
S = 1
= 2 – 2 +2 – 1
= 12ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
F =C – P+ 2r – s
r = 0
S = 1
= 2 – 2 +2 – 1
= 12ND EXPLANATION
3RD EXPLANATION

Question 42 of 65
42. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGA set of standard stainless steel pipes, each of internal diameter 26.65 mm and 6000 mm length, is used to make a plug flow reactor by joining them in series to carry out degradation of polyethylene. Seven such pipes are required to obtain a conversion of 66%at 450 K. The minimum number of standard 8000 mm long pipes of the same internal diameter to be procured for obtaining at least 66% conversion under the same reaction conditions is
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 43 of 65
43. Question
1 pointsCategory: PROCESS CONTROLMatch the items in Column A with the items in Column B
Here, φ denotes the phase shift, K1 and K2 the process gains, τ the time constant, and AR the amplitude ratio.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 44 of 65
44. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGHydrogenation of benzene is to be carried out using Ni (density = 8910 kg/m³ ) as catalyst, cast in the form of nonporous hollow cylinders, as shown below. The reaction occurs on all the surfaces of the hollow cylinder. During an experiment, one such cylinder is suspended in the reactant stream. If the observed rate of reaction is 0.39 mol (kg of catalyst surface)¹ min¹, then the rate of reaction in mol (kg of catalyst)¹ min¹ is ________________ (rounded off to three decimal places).
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 45 of 65
45. Question
1 pointsIt is decided to extract A from a feed containing 20 mol% A and 80 mol% B in two ideal crosscurrent stages as shown below, using equal amount of pure solvent C in each stage.
Components B and C are immiscible. 60% of A in the feed is extracted in Stage 1. The equilibrium relation is given by Y* = 1.5 X where,
X = moles of A per mole of B in raffinate
Y* = moles of A per mole of C in extract in equilibrium with raffinate
The mol % of A in raffinate from Stage 2 is __________ (rounded off to second decimal place).Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 46 of 65
46. Question
2 pointsCategory: THERMODYNAMICSCorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 47 of 65
47. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe elementary secondorder liquid phase reaction A+B→C+Dis carried out in an isothermal plug flow reactor of 2 m³ volume. The inlet volumetric flow rate is 10 m³/ h . The initial concentrations of both A and B are 2 kmol /m³ . The rate constant is given as 2.5 m³ kmol¹ h¹ .The percentage conversion of A is _________.
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 48 of 65
48. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGA CSTR and a PFR of equal volume are connected in series as shown below to carry out a first–order, isothermal, liquid phase reaction
The rate constant is 0.2 s¹ . The spacetime is 5 s for both the reactors. The overall fractional conversion of A is ____________ (rounded off to third decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 49 of 65
49. Question
1 pointsCategory: PROCESS CONTROLConsider the following transfer function:
Where, the natural period of oscillation is in mm. The amplitude ratio at a frequency of 0.5rad/min is____________ (rounded off to second decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 50 of 65
50. Question
1 pointsCategory: MATHEMATICSCorrect
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 51 of 65
51. Question
1 pointsCategory: MASS TRANSFERA binary distillation column is designed by McCabeThiele method to get a distillate mole fraction of 0.9. The enriching section operating line has an intercept with yaxis at 0.3 mole fraction. The ratio of liquid to vapour molar flow rate in the enriching section is____________ (rounded off to third decimal place).

Question 52 of 65
52. Question
1 pointsMatch the equipment in Column A with the corresponding process in Column B
Column–A Column–B
(P) Centrifugal sifter (I) Mixing
(Q) Bowl mill (II) Sedimentation
(R) Gravity thickener (III) Screening
(S) Twoarm kneader (IV) Grinding
Correct
Incorrect

Question 53 of 65
53. Question
1 pointsCategory: ECONOMICSA person is drowning in sea at location R and the lifeguard is standing at location P. The beach boundary is straight and horizontal, as shown in the figure.
The lifeguard runs at a speed of and swims at a speed of V. In order to reach to the drowning person in optimum time, the lifeguard should choose point Q such that
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 54 of 65
54. Question
1 pointsCategory: PROCESS CONTROLThe decay ratio for a system having complex conjugate poles as
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 55 of 65
55. Question
2 pointsCategory: THERMODYNAMICSCorrect
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 56 of 65
56. Question
2 pointsCategory: MASS TRANSFERA fiberboard sheet (1.5m×2.0m×15mm) is being dried by suspending it horizontally in a current of hot, dry air. the edges are insulated so that drying takes place only from the top and bottom surfaces. The wet sheet weighing 16 kg with initial moisture content of 60% loses moisture at a constant rate of 1.25 × 10^5 kgm² s¹ until the moisture content falls to 30%. All moisture contents are on dry basis. The time required for drying during constant rate period (in hour) is ___________ (rounded off to third decimal place)
Correct
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2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 57 of 65
57. Question
1 pointsCategory: ECONOMICSA furnace installed at a cost of Rs. 24 Lakh is expected to serve its useful life of 5 years. Salvage value of the furnace is Rs. 8 Lakh. The interest rate compounded annually is 8%.The estimated capitalized cost (in Lakhs of rupees) is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 58 of 65
58. Question
2 pointsCategory: ECONOMICSIn the year 2005, the cost of a shell and tube heat exchanger with 68 m² heat transfer area was Rs. 12.6 Lakh for Chemical Engineering Index for cost in 2005 was 509.4 and now the index is 575.4. Based on index of 0.6 for capacity scaling, the present cost (in Lakhs of rupees) of a similar heat exchanger having 100 m² heat transfer area is estimated to be
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 59 of 65
59. Question
1 pointsCategory: HEAT TRANSFERAn insulated storage tank contains 1000 kg liquid of specific heat 10 kJ kg¹K¹ . The liquid is heated by saturated steam, condensing in a helical coil at a temperature of 180 ºC . The heat transfer area of the coil is 0.1 m² . If the overall heat transfer coefficient is constant at 1000 W m² K¹ , then the time (in hours) required to raise the temperature of the liquid in the tank from 20 ºC to 80 ºC is _____________ (rounded off to second decimal place).
Correct
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
3RD EXPLANATION

Question 60 of 65
60. Question
1 pointsCategory: MASS TRANSFERThe humidity of air at a drybulb temperature of 65°C is 0.025 kg water/kg dry air. The latent heat of vaporization of water at 0° C is 2500 kJ/kg. The psychrometric ratio of air is 0.95 kJ (kg dry air)¹ K¹. Considering 0 0 Cas reference temperature, the enthalpy of air (in kJ/kg) at its adiabatic saturation temperature of 35 °C is _____________ (rounded off to two decimal places).
Correct
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Question 61 of 65
61. Question
2 pointsCategory: HEAT TRANSFERVapour bubbles are formed in the nucleate boiling regime at a frequency of 10 bubbles per second per nucleation site. There are 100 nucleation sites per m² of heating area. The latent heat of vapourization and the density of vapour under the operating condition are 1000 kJ/kg and 1 kg/m³ respectively. The diameter of each bubble is 10 m. Assume that the entire heat supplied is used for vapour generation. The heat flux (in Watt per m² of heating area) is ______________ (rounded off to third decimal place).
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Question 62 of 65
62. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGCorrect
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0.4 (independent of temp)
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0.4 (independent of temp)
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Question 63 of 65
63. Question
2 pointsCategory: THERMODYNAMICSU nder isothermal condition, a vertical tube of length L = 100 m contains a gas of molecular weight equal to 60. The pressure and temperature at the top of the tube are 100 kPa and 25 ºC respectively. Consider the universal gas constant and acceleration due to gravity as 8.314 J mol¹ K¹ and 9.81 m s² respectively. If the gas is ideal, the pressure (in kPa) at the bottom of the tube will be ____________ (rounded off to third decimal place).
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Question 64 of 65
64. Question
1 pointsCategory: HEAT TRANSFERA hot liquid is to be cooled in a 11 shell and tube heat exchanger from 80 ºC to 50 ºC. Cooling water enters the tube side at 30 ºC, and exits at 45 ºC. The properties of the liquids are constant. Also, the overall heat transfer coefficient is same for countercurrent and cocurrent modes. The percentage saving in heat transfer area for countercurrent option with respect to the area of cocurrent option is __________ (rounded off to third decimal place).
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Question 65 of 65
65. Question
2 pointsCategory: FLUID MECHANICSA t a shear rate of 10 s¹, the apparent viscosity of a nonNewtonian liquid was found to be 1 Pa s. At a shear rate of 100 s¹, the apparent viscosity of the same liquid was found to be 0.5 Pa s. If the liquid follows power law behavior, the apparent viscosity (in Pa s) at a shear stress of 10 N m² is _____________ (rounded off to two decimal place).
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