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Chemical Engineering Gate 2014
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Categories
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 CHEMICAL TECHNOLOGY 0%
 ECONOMICS 0%
 FLUID MECHANICS 0%
 HEAT TRANSFER 0%
 MASS TRANSFER 0%
 MATHEMATICS 0%
 MECHANICAL OPERATIONS 0%
 PLANT DESIGN 0%
 PROCESS CALCULATIONS 0%
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Question 1 of 65
1. Question
1 pointsCategory: APTITUDEA student is required to demonstrate a high level of comprehension of the subject, especially in the social sciences.
The word closest in meaning to comprehension isCorrect
Incorrect

Question 2 of 65
2. Question
1 pointsCategory: APTITUDEChoose the most appropriate word from the options given below to complete the following sentence.
One of his biggest ______ was his ability to forgive.Correct
Incorrect

Question 3 of 65
3. Question
1 pointsCategory: APTITUDERajan was not happy that Sajan decided to do the project on his own. On observing his unhappiness, Sajan explained to Rajan that he preferred to work independently.Which one of the statements below is logically valid and can be inferred from the above sentences?
Correct
Incorrect

Question 4 of 65
4. Question
1 pointsCategory: MATHEMATICSIf y=5x² + 3, then the tangent at x = 0, y = 3
Correct
1st explanation
y=5x²+3 ,
Slope of tangent=10×0 = 0
Slope = 0 ⇒ tangent is parallel to xaxis.
2nd explanation
Incorrect
1st explanation
y=5x²+3 ,
Slope of tangent=10×0 = 0
Slope = 0 ⇒ tangent is parallel to xaxis.
2nd explanation

Question 5 of 65
5. Question
1 pointsCategory: ECONOMICSA foundry has a fixed daily cost of Rs 50,000 whenever it operates and a variable cost of Rs 800Q, where Q is the daily production in tonnes. What is the cost of production in Rs per tonne for a daily production of 100 tonnes?
Correct
1st explanation
Fixed cost = Rs. 50,000
Variable cost = Rs. 800Q
Q = daily production in tones
For 100 tonnes of production daily, total cost of production
= 50,000+800×100 = 130,000
So, cost of production per tonne of daily production=130,000/100=Rs.13002nd explanation
Incorrect
1st explanation
Fixed cost = Rs. 50,000
Variable cost = Rs. 800Q
Q = daily production in tones
For 100 tonnes of production daily, total cost of production
= 50,000+800×100 = 130,000
So, cost of production per tonne of daily production=130,000/100=Rs.13002nd explanation

Question 6 of 65
6. Question
1 pointsCategory: APTITUDEFind the odd one in the following group: ALRVX, EPVZB, ITZDF, OYEIK
Correct
ALRVX→only one vowel
EPVZB→only one vowel
ITZDF→only one vowel
OYEIK→three vowelsIncorrect
ALRVX→only one vowel
EPVZB→only one vowel
ITZDF→only one vowel
OYEIK→three vowels 
Question 7 of 65
7. Question
2 pointsCategory: APTITUDEAnuj, Bhola, Chandan, Dilip, Eswar and Faisal live on different floors in a sixstoreyed building (the ground floor is numbered 1, the floor above it 2, and so on). Anuj lives on an evennumbered floor. Bhola does not live on an odd numbered floor. Chandan does not live on any of the floors below Faisal’s floor. Dilip does not live on floor number 2. Eswar does not live on a floor immediately above or immediately below Bhola. Faisal lives three floors above Dilip. Which of the following floorperson combinations is correct?
Correct
(a) Anuj: Even numbered floor (2,4,6)
(b) Bhola: Even numbered floor (2,4,6)
(c) Chandan lives on the floor above that of Faisal.
(d) Dilip: not on 2nd floor.
(e) Eswar: does not live immediately above or immediately below Bhola
From the options its clear, that only option (B) satisfies condition (e).
So, correct Ans is (B).Incorrect
(a) Anuj: Even numbered floor (2,4,6)
(b) Bhola: Even numbered floor (2,4,6)
(c) Chandan lives on the floor above that of Faisal.
(d) Dilip: not on 2nd floor.
(e) Eswar: does not live immediately above or immediately below Bhola
From the options its clear, that only option (B) satisfies condition (e).
So, correct Ans is (B). 
Question 8 of 65
8. Question
1 pointsCategory: APTITUDEThe smallest angle of a triangle is equal to two thirds of the smallest angle of a quadrilateral. The ratio between the angles of the quadrilateral is 3:4:5:6. The largest angle of the triangle is twice its smallest angle. What is the sum, in degrees, of the second largest angle of the triangle and the largest angle of the quadrilateral?
Correct
1st explanation
Let the angles of quadrilateral are 3x, 4x, 5x, 6x
So, 3x+4x+5x+6x = 360
x = 20
Smallest angle of quadrilateral = 3×20 = 60°
Smallest angle of triangle =2/3 ×60º =40ºLargest angle of triangle = 2×40° = 60°
Three angles of triangle are 40°, 60°, 80°
Largest angle of quadrilateral is 120°
Sum (2nd largest angle of triangle + largest angle of quadrilateral)
= 60°+120°=180°.2nd explanation
Incorrect
1st explanation
Let the angles of quadrilateral are 3x, 4x, 5x, 6x
So, 3x+4x+5x+6x = 360
x = 20
Smallest angle of quadrilateral = 3×20 = 60°
Smallest angle of triangle =2/3 ×60º =40ºLargest angle of triangle = 2×40° = 60°
Three angles of triangle are 40°, 60°, 80°
Largest angle of quadrilateral is 120°
Sum (2nd largest angle of triangle + largest angle of quadrilateral)
= 60°+120°=180°.2nd explanation

Question 9 of 65
9. Question
1 pointsCategory: APTITUDEOne percent of the people of country X are taller than 6 ft. Two percent of the people of country Y are taller than 6 ft. There are thrice as many people in country X as in country Y. Taking both countries together, what is the percentage of people taller than 6 ft?
Correct
1st explanation
Let number of people in country y = 100
So, number of people in country x = 300
Total number of people taller than 6ft in both the countries% of people taller than 6ft in both the countries=
2nd explanation
Incorrect
1st explanation
Let number of people in country y = 100
So, number of people in country x = 300
Total number of people taller than 6ft in both the countries% of people taller than 6ft in both the countries=
2nd explanation

Question 10 of 65
10. Question
2 pointsCategory: APTITUDEThe monthly rainfall chart based on 50 years of rainfall in Agra is shown in the following figure. Which of the following are true? (k percentile is the value such that k percent of the data fall below that value)
(i) On average, it rains more in July than in December
(ii) Every year, the amount of rainfall in August is more than that in January
(iii) July rainfall can be estimated with better confidence than February rainfall
(iv) In August, there is at least 500 mm of rainfallCorrect
In the question the monthly average rainfall chart for 50 years has been given.
Let us check the options.
(i) On average, it rains more in July than in December ⇒ correct.
(ii) Every year, the amount of rainfall in August is more than that in January.
⇒ may not be correct because average rainfall is given in the question.
(iii) July rainfall can be estimated with better confidence than February rainfall.
⇒ From chart it is clear the gap between 5 percentile and 95 percentile from average is
higher in February than that in July ⇒correct.
(iv) In August at least 500 mm rainfall
⇒ May not be correct, because its 50 year average.
So correct option (B) (i) and (iii).Incorrect
In the question the monthly average rainfall chart for 50 years has been given.
Let us check the options.
(i) On average, it rains more in July than in December ⇒ correct.
(ii) Every year, the amount of rainfall in August is more than that in January.
⇒ may not be correct because average rainfall is given in the question.
(iii) July rainfall can be estimated with better confidence than February rainfall.
⇒ From chart it is clear the gap between 5 percentile and 95 percentile from average is
higher in February than that in July ⇒correct.
(iv) In August at least 500 mm rainfall
⇒ May not be correct, because its 50 year average.
So correct option (B) (i) and (iii). 
Question 11 of 65
11. Question
1 pointsCategory: MATHEMATICSGradient of a scalar variable is always
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 12 of 65
12. Question
1 pointsCategory: MATHEMATICSFor the time domain function, f(t) = t² ,which ONE of the following is the Laplace transform of
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 13 of 65
13. Question
1 pointsCategory: MATHEMATICSIf f*(x) is the complex conjugate of f(x) = cos(x) + i sin(x), then for real a and b, is ALWAYS
Correct
1st explanation
f(x) = cos(x) + i sin(x),
f*(x) = cos(x) – i sin(x),
Real for real a &b.
2nd explanation
Incorrect
1st explanation
f(x) = cos(x) + i sin(x),
f*(x) = cos(x) – i sin(x),
Real for real a &b.
2nd explanation

Question 14 of 65
14. Question
1 pointsCategory: MATHEMATICSIf f(x) is a real and continuous function of x, the Taylor series expansion of f(x) about its minima will NEVER have a term containing
Correct
1st explanation
For a real valued function y = f(x)
Taylor series expansion about ‘a’
For minima at x=a , f′(a) =0.
So, Taylor series expansion of f(x) about ‘a’ will never contain first derivative term.
2nd explanation
Incorrect
1st explanation
For a real valued function y = f(x)
Taylor series expansion about ‘a’
For minima at x=a , f′(a) =0.
So, Taylor series expansion of f(x) about ‘a’ will never contain first derivative term.
2nd explanation

Question 15 of 65
15. Question
1 pointsCategory: THERMODYNAMICSFrom the following list, identify the properties which are equal in both vapour and liquid phases at equilibrium
P. Density Q. Temperature
R. Chemical potential S. EnthalpyCorrect
1st explanation
For phase equilibrium
Temperature;
Pr essure;
Chemical potential;
2nd explanation
Incorrect
1st explanation
For phase equilibrium
Temperature;
Pr essure;
Chemical potential;
2nd explanation

Question 16 of 65
16. Question
1 pointsCategory: THERMODYNAMICSIn a closed system, the isentropic expansion of an ideal gas with constant specific heats is represented by
Correct
1st explanation
For isentropic expansion,
∴ ϒ is positive slope of lnP vs lnV is negative.
2nd explanation
Incorrect
1st explanation
For isentropic expansion,
∴ ϒ is positive slope of lnP vs lnV is negative.
2nd explanation

Question 17 of 65
17. Question
1 pointsCategory: THERMODYNAMICSMatch the following :
Correct
Incorrect

Question 18 of 65
18. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGIn order to achieve the same conversion under identical reaction conditions and feed flow rate for a nonautocatalytic reaction of positive order, the volume of an ideal CSTR is
Correct
1st explanation
For CSTR, volume
For PFR volume
From plot it is clear that volume of ideal CSTR (area) is higher than that of the ideal PFR.
2nd explanation
Incorrect
1st explanation
For CSTR, volume
For PFR volume
From plot it is clear that volume of ideal CSTR (area) is higher than that of the ideal PFR.
2nd explanation

Question 19 of 65
19. Question
1 pointsCategory: PROCESS CONTROLIntegral of the timeweighted absolute error (ITAE) is expressed as
Correct
Incorrect

Question 20 of 65
20. Question
1 pointsCategory: PROCESS CONTROLA unit IMPULSE response of a first order system with time constant t and steady state gain Kp is given by
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 21 of 65
21. Question
1 pointsCategory: HEAT TRANSFERIn a completely opaque medium, if 50% of the incident monochromatic radiation is absorbed, then which of the following statements are CORRECT?
Correct
1st explanation
For a completely opaque system τ = 0 ⇒ S
Given ∝ = 0.5
∝+ τ +γ= 1
So, γ = 0.5 ⇒ P
Final Ans is (A) P and S only.2nd explanation
Incorrect
1st explanation
For a completely opaque system τ = 0 ⇒ S
Given ∝ = 0.5
∝+ τ +γ= 1
So, γ = 0.5 ⇒ P
Final Ans is (A) P and S only.2nd explanation

Question 22 of 65
22. Question
1 pointsCategory: FLUID MECHANICSIn case of a pressure driven laminar flow of a Newtonian fluid of viscosity (μ) through a horizontal circular pipe, the velocity of the fluid is proportional to
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 23 of 65
23. Question
1 pointsCategory: FLUID MECHANICSWhich of the following statements are CORRECT?
(P) For a rheopectic fluid, the apparent viscosity increases with time under a constant applied shear stress
(Q) For a pseudoplastic fluid, the apparent viscosity decreases with time under a constant applied shear stress
(R) For a Bingham plastic, the apparent viscosity increases exponentially with the deformation rate
(S) For a dilatant fluid, the apparent viscosity increases with increasing deformation rateCorrect
Incorrect

Question 24 of 65
24. Question
1 pointsCategory: PROCESS CONTROLAssume that an ordinary mercuryinglass thermometer follows first order dynamics with a time constant of 10s. It is at a steady state temperature of 0°C. At time t = 0, the thermometer is suddenly immersed in a constant temperature bath at 100°C. The time required (in s) for the thermometer to read 95°C, approximately is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 25 of 65
25. Question
1 pointsCategory: MASS TRANSFERPacked towers are preferred for gasliquid mass transfer operations with foaming liquids because
Correct
Incorrect

Question 26 of 65
26. Question
1 pointsCategory: MASS TRANSFERA spherical storage vessel is quarter–filled with toluene. The diameter of the vent at the top of the vessel is 1/20th of the diameter of the vessel. Under the steady state condition, the diffusive flux of toluene is maximum at
Correct
1st explanation
Diffusive flux is maximum at the vent and remains same throughout the vent line at steady state.
2nd explanation
Incorrect
1st explanation
Diffusive flux is maximum at the vent and remains same throughout the vent line at steady state.
2nd explanation

Question 27 of 65
27. Question
1 pointsCategory: MECHANICAL OPERATIONSIn order to produce fine solid particles between 5 and 10 μm, the appropriate size reducing equipment is
Correct
Incorrect

Question 28 of 65
28. Question
1 pointsCategory: FLUID MECHANICSSlurries are most conveniently pumped by a
Correct
Incorrect

Question 29 of 65
29. Question
1 pointsCategory: MASS TRANSFERAssuming the mass transfer coefficients in the gas and the liquid phases are comparable, the absorption of CO2 from reformer gas (CO2+H2) into an aqueous solution of diethanol amine is controlled by
Correct
Incorrect

Question 30 of 65
30. Question
1 pointsCategory: MASS TRANSFERWhich ONE of the following statements is CORRECT for the surface renewal theory?
Correct
Incorrect

Question 31 of 65
31. Question
1 pointsCategory: HEAT TRANSFERSteam economy of a multiple effect evaporator system is defined as
Correct
Incorrect

Question 32 of 65
32. Question
1 pointsCategory: PROCESS CALCULATIONSDecomposition efficiency (ηD) of an electrolytic cell used for producing NaOH is defined as
Correct
Incorrect

Question 33 of 65
33. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe vessel dispersion number for an ideal CSTR is
Correct
1st explanation
Dispersion number =
For an ideal CSTR ,
2nd explanation
Incorrect
1st explanation
Dispersion number =
For an ideal CSTR ,
2nd explanation

Question 34 of 65
34. Question
1 pointsCategory: CHEMICAL TECHNOLOGYCatalytic cracking is
Correct
Incorrect

Question 35 of 65
35. Question
1 pointsCategory: CHEMICAL TECHNOLOGYWhich ONE of the following statements is CORRECT?
Correct
Incorrect

Question 36 of 65
36. Question
1 pointsCategory: MATHEMATICSConsider the following differential equation
The solution of this equation at x = 0.4 using Euler method with a step size of h= 0.2 is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 37 of 65
37. Question
2 pointsCategory: MATHEMATICSThe integrating factor for the differential equation
is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 38 of 65
38. Question
2 pointsCategory: MATHEMATICSThe differential equation is a
Correct
Given equation
This is clearly a linear differential equation
Order = 2
Degree = 1.Incorrect
Given equation
This is clearly a linear differential equation
Order = 2
Degree = 1. 
Question 39 of 65
39. Question
1 pointsCategory: MATHEMATICSConsider the following two normal distributions
If μ and σ denote the mean and standard deviation, respectively, then
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 40 of 65
40. Question
2 pointsCategory: MATHEMATICSIn rolling of two fair dice, the outcome of an experiment is considered to be the sum of the numbers appearing on the dice. The probability is highest for the outcome of ________
Correct
Incorrect

Question 41 of 65
41. Question
2 pointsCategory: MASS TRANSFERA spherical ball of benzoic acid (diameter = 1.5 cm) is submerged in a pool of still water. The solubility and diffusivity of benzoic acid in water are 0.03 kmol/m³ and respectively. Sherwood number is given as The initial rate of dissolution (in kmol/s) of benzoic acid approximately is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 42 of 65
42. Question
2 pointsCategory: MASS TRANSFERA wet solid of 100 kg is dried from a moisture content of 40wt% to 10wt%. The critical moisture content is 15wt% and the equilibrium moisture content is negligible. All moisture contents are on dry basis. The falling rate is considered to be linear. It takes 5 hours to dry the material in the constant rate period. The duration (in hours) of the falling rate period is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 43 of 65
43. Question
2 pointsCategory: HEAT TRANSFERA brick wall of 20 cm thickness has thermal conductivity of 0.7 W m¹ K¹. An insulation of thermal conductivity 0.2 W m¹ K¹ is to be applied on one side of the wall, so that the heat transfer through the wall is reduced by 75%. The same temperature difference is maintained across the wall before and after applying the insulation. The required thickness (in cm) of the insulation is ____________
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 44 of 65
44. Question
2 pointsCategory: HEAT TRANSFERAn oil with a flow rate of 1000 kg/h is to be cooled using water in a doublepipe counterflow heat exchanger from a temperature of 70°C to 40°C. Water enters the exchanger at 25°C and leaves at 40°C. The specific heats of oil and water are 2 kJ kg¹ K¹ and 4.2 kJ kg¹ K¹, respectively. The overall heat transfer coefficient is 0.2 kW m² K¹. The minimum heat exchanger area (in m2) required for this operation is ______________
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 45 of 65
45. Question
2 pointsCategory: THERMODYNAMICSWhich ONE of the following is CORRECT for an ideal gas in a closed system?
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 46 of 65
46. Question
2 pointsCategory: MASS TRANSFERA binary distillation column is operating with a mixed feed containing 20 mol% vapour. If the feed quality is changed to 80 mol% vapour, the change in the slope of the qline is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 47 of 65
47. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGA homogeneous reaction (R → P) occurs in a batch reactor. The conversion of the reactant R is 67% after 10 minutes and 80% after 20 minutes. The rate equation for this reaction is
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 48 of 65
48. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGA vapour phase catalytic reaction (Q + R → S) follows Rideal mechanism (R and S are not adsorbed). Initially, the mixture contains only the reactants in equimolar ratio. The surface reaction step is rate controlling. With constants a and b, the initial rate of reaction (−r0) in terms of total pressure (PT) is given by
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 49 of 65
49. Question
2 pointsCategory: FLUID MECHANICSA incompressible fluid is flowing through a contraction section of length L and has a 1D (x direction) steady state velocity distribution, If u0 = 2 m/s and L = 3 m, the convective acceleration (in m/s²) of the fluid at L is _______
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 50 of 65
50. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERINGMatch the following:
Correct
Tank in series model → PFR with axial mixing
Liquidliquid extraction → Mixer settler
Optimum temperature progression → Nonisothermal reaction
Thiele modulus → Solid catalyst reaction.Incorrect
Tank in series model → PFR with axial mixing
Liquidliquid extraction → Mixer settler
Optimum temperature progression → Nonisothermal reaction
Thiele modulus → Solid catalyst reaction. 
Question 51 of 65
51. Question
2 pointsCategory: PROCESS CALCULATIONSTwo elemental gases (A and B) are reacting to form a liquid (C) in a steady state process as per the reaction. A + B → C. The singlepass conversion of the reaction is only 20% and hence recycle is used. The product is separated completely in pure form. The fresh feed has 49 mol% of A and B each along with 2 mol% impurities. The maximum allowable impurities in the recycle stream is 20 mol%. The amount of purge stream (in moles) per 100 moles of the fresh feed is ___________
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 52 of 65
52. Question
2 pointsCategory: THERMODYNAMICSCarbon monoxide (CO) is burnt in presence of 200% excess pure oxygen and the flame temperature achieved is 2298 K. The inlet streams are at 25 °C. The standard heat of formation (at 25 °C) of CO and CO2 are 110 kJ mol¹ and 390 kJ mol¹, respectively. The heat capacities (in J mol¹ K¹) of the components are
where, T is the temperature in K. The heat loss (in kJ) per mole of CO burnt is_____________
Correct
1st explanation
Answer: 32.0 to 38.0
2nd explanation
Incorrect
1st explanation
Answer: 32.0 to 38.0
2nd explanation

Question 53 of 65
53. Question
2 pointsCategory: ECONOMICSA cash flow of Rs. 12,000 per year is received at the end of each year (uniform periodic payment) for 7 consecutive years. The rate of interest is 9% per year compounded annually. The present worth (in Rs.) of such cash flow at time zero is __________
Correct
1st explanation
Answer: 60000 to 61000
2nd explanation
Incorrect
1st explanation
Answer: 60000 to 61000
2nd explanation

Question 54 of 65
54. Question
2 pointsCategory: PLANT DESIGNA polymer plant with a production capacity of 10,000 tons per year has an overall yield of 70%, on mass basis (kg of product per kg of raw material). The raw material costs Rs. 50,000 per ton. A process modification is proposed to increase the overall yield to 75% with an investment of Rs. 12.5 crore. In how many years can the invested amount be recovered with the additional profit? ___________
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 55 of 65
55. Question
2 pointsCategory: PROCESS CONTROLA step change of magnitude 2 is introduced into a system having the following transfer function : . The percent overshoot is ___________________.
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 56 of 65
56. Question
2 pointsCategory: PROCESS CONTROLGiven below is a simplified block diagram of a feedforward control system.
The transfer function of the process is and the disturbance transfer function is The transfer function of the PERFECT feed forward controller,
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 57 of 65
57. Question
2 pointsCategory: HEAT TRANSFERThe bottom face of a horizontal slab of thickness 6 mm is maintained at 300ºC. The top face is exposed to a flowing gas at 30ºC. The thermal conductivity of the slab is 1.5 W m¹ K¹ and the convective heat transfer coefficient is 30 W m²K¹ At steady state, the temperature (in ºC) of the top face is __________
Correct
1st explanation
At steady state
heat flux due to conduction = heat flux due to convection2nd explanation
Incorrect
1st explanation
At steady state
heat flux due to conduction = heat flux due to convection2nd explanation

Question 58 of 65
58. Question
2 pointsCategory: FLUID MECHANICSIn a steady incompressible flow, the velocity distribution is given by where, V is in m/s and x, y, and z are in m. In order to satisfy the mass conservation, the value of the constant P (in s¹) is ____________
Correct
1st explanation
2nd explanation
Incorrect
1st explanation
2nd explanation

Question 59 of 65
59. Question
2 pointsCategory: FLUID MECHANICSMatch the following
Correct
Turbulence: Characterized by fluctuating velocity.
Ergun equation: for calculating pressure drop in packed bed.
Power number: For calculating power consumption in mixing tank.Incorrect
Turbulence: Characterized by fluctuating velocity.
Ergun equation: for calculating pressure drop in packed bed.
Power number: For calculating power consumption in mixing tank. 
Question 60 of 65
60. Question
2 pointsCategory: FLUID MECHANICSIn a steady and incompressible flow of a fluid (density = 1.25 kg m³), the difference between stagnation and static pressures at the same location in the flow is 30 mm of mercury (density = 13600 kg m³). Considering gravitational acceleration as 10 m s², the fluid speed (in m s¹) is ______________(nearest integer)

Question 61 of 65
61. Question
2 pointsCategory: THERMODYNAMICS 
Question 62 of 65
62. Question
2 pointsCategory: PROCESS CONTROL 
Question 63 of 65
63. Question
2 pointsCategory: PROCESS CONTROLConsider the following block diagram for a closedloop feedback control system
A proportional controller is being used with Kc = −4 . If a step change in disturbance of magnitude 2 affects the system, then the value of the offset is ____________

Question 64 of 65
64. Question
2 pointsCategory: CHEMICAL TECHNOLOGYDetermine the correctness or otherwise of the following Assertion [a] and Reason [r].
Assertion: Significant combustion of coke takes place only if it is heated at higher temperature in presence of air.
Reason: C + O2 → CO2 is an exothermic reaction.Correct
1st explanation
Both [a] and [r] are true but [r] is not the correct reason for [a].
2nd explanation
Incorrect
1st explanation
Both [a] and [r] are true but [r] is not the correct reason for [a].
2nd explanation

Question 65 of 65
65. Question
2 pointsCategory: CHEMICAL TECHNOLOGY
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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