Quizsummary
0 of 65 questions completed
Questions:
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
Information
You must specify a text. 

You must specify a text. 
Information
Chemical Engineering Gate 2017
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 65 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score 

Your score 

Categories
 Not categorized 0%
 APTITUDE 0%
 CHEMICAL REACTION ENGINEERING 0%
 CHEMICAL TECHNOLOGY 0%
 ECONOMICS 0%
 FLUID MECHANICS 0%
 HEAT TRANSFER 0%
 INSTRUMENTATION 0%
 MASS TRANSFER 0%
 MATHEMATICS 0%
 MECHANICAL OPERATIONS 0%
 PROCESS CALCULATIONS 0%
 PROCESS CONTROL 0%
 THERMODYNAMICS 0%

Congratulations you have completed the test.
Thanks for choosing us.
Happy learning … Have a nice day
Pos.  Name  Entered on  Points  Result 

Table is loading  
No data available  
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 Answered
 Review

Question 1 of 65
1. Question
1 pointsCategory: FLUID MECHANICSIn a venturimeter, ΔP1 and ΔP2 are the pressure drops corresponding to volumetric flowrates Q1 and Q2 . If Q2/Q1 =2, then ΔP2/ΔP1 equals
Hint

Question 2 of 65
2. Question
1 pointsCategory: THERMODYNAMICSThe volumetric properties of two gases M and N are described by the generalized compressibility chart which expresses the compressibility factor (Z) as a function of reduced pressure and reduced temperature only. The operating pressure (P) and temperature (T) of two gases M and N along with their critical properties ( Pc,Tc) are given in the table below.
Zm and Zn are the compressibility factor of the gases M and N under the given operating conditions respectively.The relation between Zm and Zn is
Correct
Incorrect
Hint

Question 3 of 65
3. Question
1 pointsCategory: CHEMICAL TECHNOLOGYMatch the polymerization process in Group1 with the polymers in Group2.
Group1 Group2
P) Free radical polymerization I) Nylon 6.6
Q) Ziegler Natta polymerization II) Polypropylene
R) Condensation polymerization III) Poly vinyl chloride
Choose the correct set of combinations.Correct
P. Free Radical Polymerisation III) Poly Vinyl Chloride
Q. Zeigler Natta Polymerisation II) Polypropylene
R. condensation Polymerisation I) Nylon 6, 6PIII, QII, RI
Incorrect
P. Free Radical Polymerisation III) Poly Vinyl Chloride
Q. Zeigler Natta Polymerisation II) Polypropylene
R. condensation Polymerisation I) Nylon 6, 6PIII, QII, RI

Question 4 of 65
4. Question
1 pointsCategory: INSTRUMENTATIONAn LVDT (Linear Variable Differential Transformer) is a transducer used for converting
Correct
LVDT converts displacement to voltage.
DISPLACEMENT TO VOLTAGE.
Incorrect
LVDT converts displacement to voltage.
DISPLACEMENT TO VOLTAGE.
Hint

Question 5 of 65
5. Question
1 pointsCategory: INSTRUMENTATIONMatch the variables in Group1 with the instruments in Group2.
Group1 Group2
P) Temperature I) Capacitance probe
Q) Liquid level II) McLeod gauge
R) Vacuum III) Chromatograph
S) Concentration IV) Thermistor
Choose the correct set of combinations.Correct
Correct option is (C)
Temperature → Thermistor  Liquid level → Capacitance probe.
Vacuum → McLeod gauge  Concentration → Chromatograph.
EXPALANATION: THERMISTOR It is a type of resistor whose resistance is dependent on temperature. Measure temperature in the range of −90 °C to 130 °C.
 CAPACITANCE PROBE It is a point level indicator, commonly used for high or low level detection in a bin, tank or silo.
 McLEOD GAUGE Purpose is to measure gas pressure at very small pressures, down to near vacuum,on the same principle of manometer.
 CHROMATOGRAPH In chromatography chroma means “color” & graphein means “ to write”, thus it is a laboratory technique to separate mixture. So chromatograph are instrument to determine concentration. Types are, gas chromatographic or liquid chromatographic
PIV, QI, RII, SIII
Incorrect
Correct option is (C)
Temperature → Thermistor  Liquid level → Capacitance probe.
Vacuum → McLeod gauge  Concentration → Chromatograph.
EXPALANATION: THERMISTOR It is a type of resistor whose resistance is dependent on temperature. Measure temperature in the range of −90 °C to 130 °C.
 CAPACITANCE PROBE It is a point level indicator, commonly used for high or low level detection in a bin, tank or silo.
 McLEOD GAUGE Purpose is to measure gas pressure at very small pressures, down to near vacuum,on the same principle of manometer.
 CHROMATOGRAPH In chromatography chroma means “color” & graphein means “ to write”, thus it is a laboratory technique to separate mixture. So chromatograph are instrument to determine concentration. Types are, gas chromatographic or liquid chromatographic
PIV, QI, RII, SIII

Question 6 of 65
6. Question
1 pointsCategory: HEAT TRANSFERThe thickness of laminar boundary layer over a flat plate varies along the distance from the leading edge of the plate. As the distance increases, the boundary layer thickness
Correct
Correct option is (A)
Explanation:
δ/x=c/(√Rex) , Rex = ρ*v*x/μ
=> δ∝ x^0.5
as x increases δ also increases .Incorrect
Correct option is (A)
Explanation:
δ/x=c/(√Rex) , Rex = ρ*v*x/μ
=> δ∝ x^0.5
as x increases δ also increases . 
Question 7 of 65
7. Question
1 pointsCategory: MATHEMATICSThe marks obtained by a set of students are 38, 84, 45,70, 75, 60, 48.The mean and median marks, respectively, are
Correct
Mean = (38+ 84+ 45+ 70 +75+60 +48) /7 =60
In ascending order
38, 45, 48, 60, 70, 75, 84
Median = Middle most observation= 60Incorrect
Mean = (38+ 84+ 45+ 70 +75+60 +48) /7 =60
In ascending order
38, 45, 48, 60, 70, 75, 84
Median = Middle most observation= 60 
Question 8 of 65
8. Question
1 pointsCategory: HEAT TRANSFERIn a heat exchanger, the inner diameter of a tube is 25 mm and its outer diameter is 30 mm.The overall heat transfer coefficient based on the inner area is 360 W/m².ºC. Then, the overall heat transfer coefficient based on the outer area, rounded to the nearest integer, is ___W/m².ºC.
Correct
Di=25 mm
Do=30 mm
Vi=360 W/m²ºC
ViAi = VoAo
Incorrect
Di=25 mm
Do=30 mm
Vi=360 W/m²ºC
ViAi = VoAo

Question 9 of 65
9. Question
1 pointsCategory: ECONOMICSThe cost of a new pump (including installation) is 24,000 Rupees. The pump has useful life of 10 years. Its salvage value is 4000 Rupees. Assuming straight line depreciation, the book value of the pump at the end of 4th year, rounded to the nearest integer, is ___ Rupees.
Correct
Cost of new pump = Rs. 24000
Useful life of pump = 10 years
Salvage value of pump at the end of service life = 4000
Annual Depreciation using straight line method = (240004000)/10 = 2000 Rs
Book Value at the end of 4th year = Cost of equipment – Accumulated Depreciation till the end of 4th year
= 24000 (4*Annual depreciation)
= 24000(4*2000)
=240008000
= 16000 RsALTERNATIVE EXPLANATION :
V0,V0D,V02D,V03D,V04D,…………V0nD
n=10
Vn=4000
V0=24000
Vn=V0nD
Solving,
4000=2400010D
∴D=2000
V4= V04D
V4=240004×2000
∴V4=16000Incorrect
Cost of new pump = Rs. 24000
Useful life of pump = 10 years
Salvage value of pump at the end of service life = 4000
Annual Depreciation using straight line method = (240004000)/10 = 2000 Rs
Book Value at the end of 4th year = Cost of equipment – Accumulated Depreciation till the end of 4th year
= 24000 (4*Annual depreciation)
= 24000(4*2000)
=240008000
= 16000 RsALTERNATIVE EXPLANATION :
V0,V0D,V02D,V03D,V04D,…………V0nD
n=10
Vn=4000
V0=24000
Vn=V0nD
Solving,
4000=2400010D
∴D=2000
V4= V04D
V4=240004×2000
∴V4=16000 
Question 10 of 65
10. Question
1 pointsCategory: MECHANICAL OPERATIONSA gas bubble (gas density ρg = 2 kg /m³ ; bubble diameter D=104 m³ ) is rising vertically through water (density r =1000 kg /m³ ;viscosity μ = 0.001 Pa.s ). Force balance on the bubble leads to the following equation,
Where n is the velocity of the bubble at any given time t. Assume that the volume of the rising bubble does not change. The value of g = 9.81 m/s² .The terminal rising velocity of the bubble (in cm/s), rounded to 2 decimal places, is ___ cm/s.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 11 of 65
11. Question
1 pointsCategory: THERMODYNAMICSWater is heated at atmospheric pressure from 40ºC to 80ºC using two different processes. In process I, the heating is done by a source at 80ºC. In process II, the water is first heated from 40ºC to 60ºC by a source at 60ºC, and then from 60ºC to 80ºC by another source at 80ºC. Identify the correct statement.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 12 of 65
12. Question
1 pointsCategory: CHEMICAL TECHNOLOGYThe DCDA (Double Contact Double Absorption) process is used the manufacture of
Correct
1ST EXPLANATION
The contact process is the current method of producing sulphuric acid in the high concentrations needed for industrial processes. Platinum used to be the catalyst for this reaction; however, as it is susceptible to reacting with arsenic impurities in the sulphuric feedstock, vanadium (V) oxide (V2O5) is now preferred.
2ND EXPLANATION
SULPHURIC ACID
Incorrect
1ST EXPLANATION
The contact process is the current method of producing sulphuric acid in the high concentrations needed for industrial processes. Platinum used to be the catalyst for this reaction; however, as it is susceptible to reacting with arsenic impurities in the sulphuric feedstock, vanadium (V) oxide (V2O5) is now preferred.
2ND EXPLANATION
SULPHURIC ACID

Question 13 of 65
13. Question
1 pointsCategory: MATHEMATICSThe real part of is ___.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 14 of 65
14. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGConsider a first order catalytic reaction in a porous catalyst pellet.
Given R – characteristic length of the pellet: De – effective diffusivity; kc – mass transfer coefficient: k1 – rate constant based on volume of the catalyst pellet; Cs – concentration of reactant on the pellet surface.
Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 15 of 65
15. Question
1 pointsCategory: MASS TRANSFERWhich of the following conditions are valid at the plait point?
P) Density difference between the extract and raffinate phases is zero
Q) Interfacial tension between the extract and raffinate phases is zero
R) Composition difference between the extract and raffinate phases is zeroCorrect
1ST EXPLANATION
Plait point signifies the condition at which the composition of two liquid phases in equilibrium become identical and indeed transforms to a single phase. At this point interfacial tension and density difference between extract and raffinate phase is zero as both phases united to form one phase.
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Plait point signifies the condition at which the composition of two liquid phases in equilibrium become identical and indeed transforms to a single phase. At this point interfacial tension and density difference between extract and raffinate phase is zero as both phases united to form one phase.
2ND EXPLANATION
Hint
plait point, when the tie line disappears. single point left where the two conjugate phases are mutually soluble.

Question 16 of 65
16. Question
1 pointsCategory: CHEMICAL TECHNOLOGYThe purpose of the mathanation reaction used in ammonia plants is to
Correct
Incorrect
1ST EXPLANATION
Methanation reaction used in ammonia plants. CO is harmful so methanation reaction converts it to methane to non harmful product. that is purpose of methanation reaction
Ammonia systhesis process
2ND EXPLANATION
REMOVE CO AS IT IS A CATALYST POISON
Hint
Methanation reaction used in ammonia plants

Question 17 of 65
17. Question
1 pointsCategory: MECHANICAL OPERATIONSWhich of the following is the correct sequence of equipment for size reduction of solids?
Correct
1ST EXPLANATION
Solid is crushed into intermediate by jaw crusher after which grinding of solid is done by hammer mill. Ultrafine grinding is done by fluid energy mill.
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Solid is crushed into intermediate by jaw crusher after which grinding of solid is done by hammer mill. Ultrafine grinding is done by fluid energy mill.
2ND EXPLANATION

Question 18 of 65
18. Question
1 pointsCategory: MATHEMATICSLet i and j be the unit vectors in the x and y directions, respectively. For the function F (x,y) = x³ + y² the gradient of the function i.e..∇F is given by
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 19 of 65
19. Question
1 pointsCategory: MASS TRANSFERConsider steady state mass transfer of a solute A from a gas phase to a liquid phase. The gas phase bulk and interface mole fractions are YA,G and YA,i respectively. The liquid phase bulk and interface mole fractions are XA,L and XA,i , respectively. The ratio is very close to zero.The implies that mass transfer resistance is
Correct
1ST EXPLANATION
=0
XA,i – XA,L =0
XA,i = XA,L
Mole fraction of liquid phase interface is equal to mole fraction of liquid phase bulk.
It means resistance in the liquid phase is negligible.
Option (B) is correct2ND EXPLANATION
Incorrect
1ST EXPLANATION
=0
XA,i – XA,L =0
XA,i = XA,L
Mole fraction of liquid phase interface is equal to mole fraction of liquid phase bulk.
It means resistance in the liquid phase is negligible.
Option (B) is correct2ND EXPLANATION

Question 20 of 65
20. Question
1 pointsCategory: MATHEMATICSThe value of is _____ .
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 21 of 65
21. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGFor a solidcatalyzed gas phase reversible reaction, which of the following statements is ALWAYS TRUE?
Correct
1ST EXPLANATION
Solid catalyst does not effect the equilibrium conversion.
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Solid catalyst does not effect the equilibrium conversion.
2ND EXPLANATION

Question 22 of 65
22. Question
1 pointsCategory: HEAT TRANSFERThe onedimensional unsteady heat conduction equation is
Where, T – temperature, t – time, r – radial position, k – thermal conductivity, ρ density, and Cp – specific heat.For the cylindrical coordinate system, the value of n in the above equation is
Correct
1ST EXPLANATION
n =1 for cylindrical coordinate system
2ND EXPLANATION
Incorrect
1ST EXPLANATION
n =1 for cylindrical coordinate system
2ND EXPLANATION

Question 23 of 65
23. Question
1 pointsCategory: MASS TRANSFERThe composition of vapour entering a tray in a distillation column is 0.47. The average composition of the vapour leaving the tray is 0.53. The equilibrium composition of the vapour corresponding to the liquid leaving this tray is 0.52. All the compositions are expressed in mole fraction of the more volatile component.
The Murphree efficiency based on the vapour phase, rounded to the nearest integer, is ___ %.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 24 of 65
24. Question
1 pointsCategory: MATHEMATICSThe number of positive roots of the function f (x) shown below in the range 0 < x < 6 is ___________.
Correct
1ST EXPLANATION
The graph of the function cuts x – axis in 3 times in 0 < x < 6
∴ The no. of positive roots=32ND EXPLANATION
Incorrect
1ST EXPLANATION
The graph of the function cuts x – axis in 3 times in 0 < x < 6
∴ The no. of positive roots=32ND EXPLANATION

Question 25 of 65
25. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe following reaction rate curve is shown for a reaction A→P. Here, (−rA) and xA represent reaction rate and conversion, respectively. The feed is pure A and 90% conversion is desired
Which amongst the following reactor configurations gives the lowest total volume of the reactor (s)?
Correct
1ST EXPLANATION
The following options give the following volumes
 CSTR followed by PFR → Area of rectangle from 0 to 0.5 and area under curve from 0.5 to 1
 Two CSTRs in series → Area of two rectangles (from 0 to 0.5 and 0.5 to 1)
 PFR followed by CSTR → Area under curve from 0 to 0.5 and area of rectangle from 0.5 to 1
 A single PFR → Area under the curve.
Its clearly shown the combination of CSTR followed by PFR
Hence answer is Option (A).2ND EXPLANATION
Incorrect
1ST EXPLANATION
The following options give the following volumes
 CSTR followed by PFR → Area of rectangle from 0 to 0.5 and area under curve from 0.5 to 1
 Two CSTRs in series → Area of two rectangles (from 0 to 0.5 and 0.5 to 1)
 PFR followed by CSTR → Area under curve from 0 to 0.5 and area of rectangle from 0.5 to 1
 A single PFR → Area under the curve.
Its clearly shown the combination of CSTR followed by PFR
Hence answer is Option (A).2ND EXPLANATION

Question 26 of 65
26. Question
1 pointsCategory: ECONOMICSThe total cost (Cτ) of an equipment in terms of the operation variables x and y is
The optimal value of Cτ , rounded to 1 decimal place, is ____.
Correct
1ST EXPLANATION
Hence the optimum value of Cτ is 91.5
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Hence the optimum value of Cτ is 91.5
2ND EXPLANATION

Question 27 of 65
27. Question
1 pointsCategory: THERMODYNAMICSThe vapour pressure of a pure substance at a temperature T is 30bar. The actual and ideal gas values of g / RT for the saturated vapour at this temperature T and 30 bar are 7.0 and 7.7 respectively. Here, g is the molar Gibbs free energy and R is the universal gas constant.The fugacity of the saturated liquid at these conditions, rounded to 1 decimal place, is ___bar.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 28 of 65
28. Question
1 pointsThe Sherwood number (ShL) correlation for laminar flow over a flat plate of length L is given by
Where ReL and Sc represent Reynolds number and Schmidt number, respectively.This correlation, expressed in the form of ChiltonColburn jD factor, is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 29 of 65
29. Question
1 pointsCategory: PROCESS CONTROLFor the initial value problem
the value of x at t=π/3,is ____ .
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 30 of 65
30. Question
1 pointsCategory: MASS TRANSFERIn a counter current stripping operation using pure steam the mole ratio of a solute in the liquid stream is reduced from 0.25 to 0.05. The liquid feed flow rate, on a solutefree basis, is 3mole/s. The equilibrium line for the system is given in the figure below.
The MINIMUM flowrate of pure steam for this process, rounded to 1 decimal place, is ___mol/s.
Correct
1ST EXPLANATION
Equation of equilibrium line can be written as y = mX
m=slope of equilibrium line =0.15/0.25 =0.6y=0.6X
Material balance of solute gives
Here, L =3mol/sec, G = minimum flow rate of pure steam
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Equation of equilibrium line can be written as y = mX
m=slope of equilibrium line =0.15/0.25 =0.6y=0.6X
Material balance of solute gives
Here, L =3mol/sec, G = minimum flow rate of pure steam
2ND EXPLANATION

Question 31 of 65
31. Question
1 pointsCategory: MATHEMATICSThe Laplace transform of a function is .The initial and final values, respectively, of the function are
Correct
1st explanation
For initial value, finding
For final value, finding
2nd explanation
Incorrect
1st explanation
For initial value, finding
For final value, finding
2nd explanation

Question 32 of 65
32. Question
2 pointsCategory: FLUID MECHANICSThe following table provides four sets of Fanning friction factor data, for different values of Reynolds number (Re) and roughness factor (K/D).
Which of the above sets of friction factor data is correct?
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION
Hint

Question 33 of 65
33. Question
1 pointsCategory: MASS TRANSFERIn a batch adsorption process, 5 g of fresh adsorbent is used to treat 1 litre of an aqueous phenol solution. The initial phenol concentration is 100 mg/litre. The equilibrium relation is given by q* =1.3C Where, q* is the amount of phenol adsorbed in mg of phenol per gram of adsorbent: and C is
the concentration of phenol in mg/litre in the aqueous solution.When equilibrium is attained between the adsorbent and the solution, the concentration of phenol in the solution, rounded to 1 decimal place is ___________ mg/litre.Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 34 of 65
34. Question
1 pointsCategory: ECONOMICSA bond has a maturity value of 20,000 Rupees at the end of 4 years. The interest is compounded at the rate of 5% per year.The initial investment to be made, rounded to the nearest integer, is _______ Rupees.
Correct
1ST EXPLANATION
Maturity value = 20000
Bond life = 4 years
Interest rate = 5%
Amount of investment to be made can be found from present worth formula
= 20000/(1+0.05)^4=16454.04=16454 Rs2ND EXPLANATION
Incorrect
1ST EXPLANATION
Maturity value = 20000
Bond life = 4 years
Interest rate = 5%
Amount of investment to be made can be found from present worth formula
= 20000/(1+0.05)^4=16454.04=16454 Rs2ND EXPLANATION

Question 35 of 65
35. Question
1 pointsCategory: MECHANICAL OPERATIONSSize analysis was carried out on a sample of gravel. The data for mass fraction (xi) and average particle diameter (Dpi) of the fraction is given in the table below :
The mass mean diameter of the sample, to the nearest integer, is ________mm.
Correct
1ST EXPLANATION
Mass mean diameter of sample
2ND EXPLANATION
Incorrect
1ST EXPLANATION
Mass mean diameter of sample
2ND EXPLANATION

Question 36 of 65
36. Question
1 pointsCategory: MECHANICAL OPERATIONSA propeller (diameter D = 15 m) rotates at N = 1 revolution per second (rps). To understand the flow around the propeller, a labscale model is made. Important parameters to study the flow are velocity of the propeller tip (V = πND) , diameter D and acceleration due to gravity (g). The labscale model is 1/100th of the size of the actual propeller.The rotation speed of the labscale model, to the nearest integer, should be _________ rps.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 37 of 65
37. Question
1 pointsCategory: PROCESS CONTROLThe transfer function of a system is
For a unit step increase in the input, the fractional overshoot, rounded to 2 decimal places, is ______.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 38 of 65
38. Question
1 pointsA fluid over a heated horizontal plate maintained at temperature Tw . The bulk temperature of the fluid is T∞ . The temperature profile in the thermal boundary layer is given by:
Here, y is the vertical distance from the plate, δt is the thickness of the thermal boundary layer and k is the thermal conductivity of the fluid.The local heat transfer coefficient is given by
Correct
1ST EXPLANATIONS
2ND EXPLANATION
Incorrect
1ST EXPLANATIONS
2ND EXPLANATION

Question 39 of 65
39. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe following liquid secondorder reaction is carried out in an isothermal CSTR at steady state A→R , (−rA) = 0.005CA² mol / m³.hr .Where,CA is the concentration of the reactant in the CSTR. The reactor volume is 2 m³,the inlet flow rate is 0.5 m³/hr and the inlet concentration of the reactant is 1000 mol /m³ .The fractional conversion, rounded to 2 decimal places, is _____.
Correct
1ST EXPLANATION
For a CSTR, The performance equation can be written as
Solving this equation yields, XA as 0.80 or 80%.
2ND EXPLANATION
Incorrect
1ST EXPLANATION
For a CSTR, The performance equation can be written as
Solving this equation yields, XA as 0.80 or 80%.
2ND EXPLANATION

Question 40 of 65
40. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGReaction A→B is carried out in a reactor operating at steady state and 1 mol/s of pure A at 425°C enters the reactor. The outlet stream leaves the reactor at 325ºC. The heat input to the reactor is 17 kW. The heat of reaction at the reference temperature of 25°C is 30 kJ/mol. The specific heat capacities (in kJ/mol.K) of A and B are 0.1 and 0.15, respectively.The molar flow rate of B leaving the reactor, rounded to 2 decimal places, is ____mol/s.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 41 of 65
41. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe Ccurve measured during a pulse tracer experiment is shown below. In the figure, C(t) is the concentration of the tracer measured at the reactor exit in mol/liter at time t seconds.
The mean residence time in the reactor, rounded to 1 decimal place, is ______ s.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 42 of 65
42. Question
2 pointsCategory: THERMODYNAMICSThe reversible reaction of tbutyl alcohol (TBA) and ethanol (EtOH) to ethyltbutyl ether (ETBE) is
TBA + EtOH ⇔ ETBE + Water
The equilibrium constant for this reaction is Kc =1. Initially, 74 g of TBA is mixed with 100g of aqueous solution containing 46 weight% ethanol. The molecular weights are:74g/mol for TBA. 46g/mol for EtOH, 102g/mol for ETBE, and 18 g/mol for water.The mass of ETBE at equilibrium, rounded to 1 decimal place, is ____g.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 43 of 65
43. Question
1 pointsLet Ibλ be the spectral black body radiation intensity per unit wavelength about the wavelength λ.The blackbody radiation intensity emitted by a blackbody over all wavelengths is
Correct
Incorrect

Question 44 of 65
44. Question
1 pointsCategory: CHEMICAL TECHNOLOGYMatch the equipment in Group1 with the process in Group2:
Group1 Group2
(P) Fluidized bed (I) Papermaking
(Q) Multistage adiabatic reactor with (II) Sodium hydroxide manufacturer
Interstage cooling
(R) Fourdrinier machine (III) SO2 oxidation
(S) Diaphragm cell (IV) Catalytic cracking
Choose the correct set of combinations.Correct
PIV, QIII, RI,SII
Incorrect
PIV, QIII, RI,SII

Question 45 of 65
45. Question
1 pointsCategory: FLUID MECHANICSOil is being delivered at a steady state flow rate through a circular pipe of a radius 1.25 ×10² m and length 10 m. The pressure drop access the pipe is 500 Pa.The shear stress at the pipe wall, rounded to 2 decimal places______ Pa
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 46 of 65
46. Question
1 pointsCategory: MATHEMATICSMatch the problem type in Group1 with the numerical method in Group2
Group1 Group2
(P) System of linear algebraic equations (I) NewtonRaphson
(Q) Nonlinear algebraic equations (II) Gaussseidel
(R) Ordinary differential equations (III) Simphson’s Rule
(S) Nemerical integrations (IV) RungeKutta
Choose the correct set of combinations.Correct
PII, Q=I, RIV,SIII
Incorrect
PII, Q=I, RIV,SIII

Question 47 of 65
47. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGThe following gasphase reaction is carried out in a constantvolume isothermal batch reactor A + B→R + S . The reactants A and B as well as the product S are noncondensable gases. At the operating temperature, the saturation pressure of the product R is 40 kPa.Initially, the batch reactor contains equimolar amounts of A and B (and no products) at a total pressure of 100 kPa. The initial concentrations of the reactants are CA,0 =CB,0=12.56 mol / m . The rate of reaction is given by (−rA) = 0.08CACB mol /m³.s .The time at which R just starts condensing, rounded to 1 decimal place, is_____
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 48 of 65
48. Question
2 pointsCategory: MASS TRANSFERThe vapor phase composition and relative volatilities (with respect to npropane) on an ideal tray of a distillation column are
The mole fraction of npropane in the liquid phase, rounded to 2 decimal places, is ____.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 49 of 65
49. Question
2 pointsCategory: PROCESS CONTROLThe Characteristic equation of a closedloop system is
Where, k > 0
The value of K beyond which the system just becomes unstable, rounded to the nearest integer, is _____.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 50 of 65
50. Question
2 pointsCategory: PROCESS CALCULATIONSA aqueous saltsolution enters a crystallizer operating at steady state at 25 ºC . The feed temperature is 90 ºC and the salt concentration in the feed is 40 weight%. The salt crystallizes as a pentahydrate. The crystals and the mother liquor leave the crystallizer. The molecular weight of the anhydrous salt is 135. The solubility of the salt at 25 ºC is 20 weight%.The feed flow rate required for a production rate of 100 kg/s of hydrated salt, rounded to the
nearest integer, is ____ kg/s.Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 51 of 65
51. Question
2 pointsCategory: THERMODYNAMICSThe pressure of a liquid is increased isothermally. The molar volume of the liquid decreases from 50.45 ×106 m³/mol to 48 × 106 m³/mol during this process. The isothermal compressibility of the liquid is 10−9 Pa−¹ , which can be assumed to be independent of pressure.The change in the molar Gibbs free energy of the liquid, rounded to nearest integer, is ___J/mol.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 52 of 65
52. Question
2 pointsCategory: PROCESS CONTROLThe open loop transfer function of a process with a proportional controller (gain Kc ) is
Based on the Bode criterion for closedloop stability, the ultimate gain of the controller, rounded to 2 decimal places, is____.
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 53 of 65
53. Question
2 pointsCategory: HEAT TRANSFERIn nucleate boiling, the pressure inside a bubble is higher than the pressure of the surrounding liquid. Assuming that both the liquid and vapour are saturated, the temperature of the liquid will ALWAYS be
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 54 of 65
54. Question
1 pointsCategory: MATHEMATICSA box has 6 red balls and 4 white balls. A ball is picked at random and replaced in the box, after which a second ball is picked. The probability of both the balls being red, rounded to 2 decimal places, is ____.
Correct
1st EXPLANATION
Required probability= (6/10) × (6/10) = 36/100 = 0.36
2ND EXPLANATION
Incorrect
1st EXPLANATION
Required probability= (6/10) × (6/10) = 36/100 = 0.36
2ND EXPLANATION

Question 55 of 65
55. Question
2 pointsCategory: THERMODYNAMICSA sparingly soluble gas (solute) is in equilibrium with a solvent at 10 bar. The mole fraction of the solvent in the gas phase is 0.01. At the operating temperature and pressure, the fugacity coefficient of the solute in the gas phase and the Henry’s law constant are 0.92 and 1000 bar, respectively. Assume that the liquid phase obeys Henry’s law.The MOLE PERCENTAGE of the solute in the liquid phase, rounded to 2 decimal places, is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 56 of 65
56. Question
1 pointsCategory: APTITUDEConsider the following sentences:
All benches are beds. No bed is a bulb. Some bulbs are lamps.
Which of the following can be inferred?(i) Some beds are lamps.
(ii) Some lamps are beds.Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 57 of 65
57. Question
1 pointsCategory: APTITUDEThe following sequence of numbers is arranged in increasing order: 1,x,x,x, y, y,9,16,18. Given that the mean and median are equal, and are also equal to twice the mode, the value of y is
Correct
1ST EXPLANATION
Incorrect
1ST EXPLANATION

Question 58 of 65
58. Question
1 pointsCategory: APTITUDEThe bacteria in milk are destroyed when it _________ heated to 80 degree Celsius.
Correct
IS
Incorrect
IS

Question 59 of 65
59. Question
1 pointsCategory: APTITUDEIf the radius of a right circular cone is increased by 50%, its volume increases by
Correct
1ST EXPLANATION
Given, radius of a right circular cone is increased by 50%.
Let, height of the circular cone =(h)2ND EXPLANATION
Incorrect
1ST EXPLANATION
Given, radius of a right circular cone is increased by 50%.
Let, height of the circular cone =(h)2ND EXPLANATION

Question 60 of 65
60. Question
1 pointsCategory: APTITUDE__________ with someone else’s email account is now very serious offence.
Correct
TAMPERING
Incorrect
TAMPERING

Question 61 of 65
61. Question
2 pointsCategory: APTITUDEStudents applying for hostel rooms are allotted rooms in order of seniority. Students already staying in a room will move if they get a room in their preferred list. Preferences of lower ranked applicants are ignored during allocation. Given the data below, which room will Ajit stay in?
Correct
1ST EXPLANATION
Amar→R
Akbar→S
Anthony→P
Ajit→Q
As per their preferences given2ND EXPLANATION
Incorrect
1ST EXPLANATION
Amar→R
Akbar→S
Anthony→P
Ajit→Q
As per their preferences given2ND EXPLANATION

Question 62 of 65
62. Question
2 pointsCategory: APTITUDEThe bar graph below shows the output of five carpenters over one month, each of home made different items of furniture: Chairs, tables, and beds.
Consider the following statements.
(i) The number of beds made by carpenter C2 is exactly the same as the same as the number of tables made by carpenter C3.
(ii) The total number of chairs made by all carpenters is less than the total number of tables.
Which one of the following is true?Correct
1ST EXPLANATION
The number of beds made by carpenter C2 is exactly the same as the number of tables made by carpenter C3
i.e., beds made by carpenter C2=8= tables made by carpenter C2From the bar graph
So,(i) is correct.
(ii) Total Number of tables made by all carpenters=31.
Total Number of chairs made by all carpenters=23
23 < 31
(ii) is correct2ND EXPLANATION
Incorrect
1ST EXPLANATION
The number of beds made by carpenter C2 is exactly the same as the number of tables made by carpenter C3
i.e., beds made by carpenter C2=8= tables made by carpenter C2From the bar graph
So,(i) is correct.
(ii) Total Number of tables made by all carpenters=31.
Total Number of chairs made by all carpenters=23
23 < 31
(ii) is correct2ND EXPLANATION

Question 63 of 65
63. Question
2 pointsCategory: APTITUDEThe last digit of is
Correct
1ST EXPLANATION
2ND EXPLANATION
Incorrect
1ST EXPLANATION
2ND EXPLANATION

Question 64 of 65
64. Question
2 pointsCategory: APTITUDETwo machines M1 and M2 are able to execute any of four jobs P, Q, R and S. The machines can perform one job on one object at a time. Jobs P, Q, R and S take 30 minutes, 20 minutes, 60 minutes and 15 minutes each respectively. There are 10 objects each requiring exactly 1 job. Job P is to be performed on 2 objects. Job Q on 3 objects. Job R on 1 object and Job S on 4 objects. What is the minimum time needed to complete all the jobs?
Correct
1ST EXPLANATION
OR
2ND EXPLANATION
Incorrect
1ST EXPLANATION
OR
2ND EXPLANATION

Question 65 of 65
65. Question
2 pointsCategory: APTITUDEThe old concert hall was demolished because of fears that the foundation would be affected by the construction tried to mitigate the impact of pressurized air pockets created by the excavation of large amounts of soil. But even with these safeguards, it was feared that the soil below the concert hall would not be stable. From this, one can infer that
Correct
1ST EXPLANATION
The old concert hall was demolished because of fear that the foundation would be affected by the construction of the new metro line in the area .Modern technology for underground metro construction tried to mitigate the impact of pressurized air pockets created by the excavation of large amount of soil . But even with these safeguards it was feared that the soil below the concert hall would be stable.
2ND EXPLANATION
METRO CONSTRUCTION HAS TO BE DONE CAREFULLY CONSIDERING ITS IMPACT ON THE FOUNDATION OF EXISTING BUILDINGS
Incorrect
1ST EXPLANATION
The old concert hall was demolished because of fear that the foundation would be affected by the construction of the new metro line in the area .Modern technology for underground metro construction tried to mitigate the impact of pressurized air pockets created by the excavation of large amount of soil . But even with these safeguards it was feared that the soil below the concert hall would be stable.
2ND EXPLANATION
METRO CONSTRUCTION HAS TO BE DONE CAREFULLY CONSIDERING ITS IMPACT ON THE FOUNDATION OF EXISTING BUILDINGS