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Following table gives data on tourists from different countries visiting India in the year2011.
Which two countries contributed to the one third of the total number of tourists who visited India in 2011
USA and Japan
Japan and Australia
England and France
USA and Australia
All engineering students should learn mechanics, mathematics and how to docomputation.
I II III IV Which of the above underlined parts of the sentence is not appropriate
I
III
IV
II
Consider the following transfer function Gp(s) = 5/
(2s +
1)4 (Note: The unit of the process time constant is inseconds.
) For the computation of Ziegler-Nichols settings, the ultimate period (in s/cycle) and the ultimate gain are
4π and 0.8, respectively
π and 0.8, respectively
π and 1.25, respectively
4π and 1.25, respectively
Consider the following transfer function Gp(s) = 5/
(2s +
1)4 (Note: The unit of the process time constant is inseconds.
) The crossover frequency (in rad/s) of the process is
20
0.1
0.5
0.05
Liquid reactant A decomposes as follows A --> R rR = k1C2A k1 = 0.5 m3/mol-s A --> S rS = k2CA k2 = 1 s-1 An aqueous feed of composition CA0 = 30 mol/m3, CR0 = 2 mol/m3 and CS0 = 1 mol/m3 enters a CSTR in which the above reactionsoccur.
Assume isothermal and steady stateconditions.
What is the % conversion of A, to the nearest integer, so that the concentration of S in the exit stream is 11.8 mol/m3? _________
30
50
90
80
Liquid reactant A decomposes as follows A --> R rR = k1C2A k1 = 0.5 m3/mol-s A --> S rS = k2CA k2 = 1 s-1 An aqueous feed of composition CA0 = 30 mol/m3, CR0 = 2 mol/m3 and CS0 = 1 mol/m3 enters a CSTR in which the above reactionsoccur.
Assume isothermal and steady state conditions If the conversion of A is 80 %, the concentration of R in the exit stream in mol/m3, to the nearest integer, is _________
20
32
25
31
The purchase cost of a heat exchanger of 20 m2 area was Rs. 500000 in2006.
What will be the estimated cost (in Rs. to the nearest integer) of a similar heat exchanger of 50 m2 area in the year 2013? Assume the six-tenths factor rule for scaling and the cost index for 2006 as430.
2. The projected cost index for the year 2013 is512.
6. _________
1010000 to 1050000
10100000 to 10500000
1010100 to 1050500
1110000 to 1240000
A unit gain 2nd order underdamped process has a period of oscillation 1 second and decay ratio 0.25. The transfer function of the process is
1/(0.024 s2 +0.067 s + 1)
1/(0.1176 s2 + 0.021 s + 1)
1/(0.021 s2 + 0.1176 s + 1)
1/(0.067 s2 + 0.024 s + 1)
A first order liquid phase reaction is carried out isothermally at a steady state in a CSTR and 90% conversion isattained.
With the same inlet conditions and for the same overall conversion, if the CSTR is replaced by two smaller and identical isothermal CSTRs in series, the % reduction in total volume, to the nearest integer, is ____________
55
54
53
52
The gas phase decomposition of azomethane to give ethane and nitrogen takes place according to the following sequence of elementaryreactions.
Using the pseudo-steady-state-approximation for [
(CH3)2 N2], the order with respect to azomethane in the rate expression for the formation of ethane, in the limit of high concentrations of azomethane, is ___________
6
3
1
7
The vapor-liquid equilibrium curve of a binary mixture A-B, may be approximated by a linear equation over a narrow range of liquid mole fractions ( 0.2 < xA < 0.3) as follows y*A = 1.325 xA + 0.121 Here y*A is the mole fraction of A in thevapor.
100 moles of a feed (xA, F = 0.28) is batch distilled to a final residue (xA, W = 0.2). Using the Rayleigh equation, the number of moles of the residue left behind in the distillation unit, up to 2 digits after the decimal point, is ____________
45 to 46
85 to 86
55 to 56
66 to 67
In the elutriation leg of a commercial crystallizer containing a mixture of coarse and very fine crystals of the same material, a liquid is pumped verticallyupward.
The liquid velocity is adjusted such that it is slightly lower than the terminal velocity of the coarse crystalsonly.
Hence
the coarse crystals will be carried upward and the very fine crystals will settle
the very fine and coarse crystals will both settle at the bottom of the tube
the very fine crystals will be carried upward and the coarse crystals will settle
the very fine and coarse crystals will both be carried upward by the liquid
A binary liquid mixture is in equilibrium with its vapor at a temperature T = 300 K. The liquid mole fraction x1 of species 1 is 0.4 and the molar excess Gibbs free energy is 200 J/mol.
The value of the universal gas constant is 8.314 J/mol-K, and ϒi denotes the liquid-phase activity coefficient of species
i. If ln(ϒ1) = 0.09, then the value of ln(ϒ2), up to 2 digits after the decimal point, is ________
1.22 to 1.23
0.01 to 0.03
0.06 to 0.08
0.09 to 0.11
The solution of the differential equation dy/dx - y2 = 0, given y = 1 at x = 0 is
1/(1 + x)
1/(1 - x)2
1/(1 - x)
x3/3 + 1
For the function f(z) = 1/[
(2 - z)(z + 2] the residue at z = 2 is _________
-0.25
-0.22
-0.23
-0.24
An isothermal liquid phase zero order reaction A --> B (k = 0.5 mol/m3 -s) is carried out in a batchreactor.
The initial concentration of A is 2 mol/m3. At 3 seconds from the start of the reaction, the concentration of A in mol/m3 is __________
0.3
0.2
0.4
0.5
The exit age distribution for a reactor is given by E(t) = δ(t -
4), where t is inseconds.
A first order liquid phase reaction (k = 0.25 s-1) is carried out in this reactor under steady state and isothermalconditions.
The mean conversion of the reactant at the exit of the reactor, up to 2 digits after the decimal point, is __________
0.62 to 0.64
0.07 to 0.09
1.00 to 1.02
0.66 to 0.68
In the Tyler standard screen scale series, when the mesh number increases from 3 mesh to 10 mesh, then
the clear opening decreases
the wire diameter increases
the clear opening is unchanged
the clear opening increases
An incompressible Newtonian fluid, filled in an annular gap between two concentric cylinders of radii R1 and R2 as shown in the figure, is flowing under steady stateconditions.
The outer cylinder is rotating with an angular velocity of Ω while the inner cylinder isstationary.
Given that (R2 - R1)
(r + R1)/(R2 + R1) R1Ω
(r - R1)/(R2 - R1) R2Ω
(r - R2)/(R2 - R1) rΩ
R2 Ω
Evaluate ( Note: C is a constant ofintegration.
)
ex/(ex - 1) + C
ln (ex - 1)/ex + C
ln[ex/(ex - 1)] + C
ln(1 - e-x) + C
1
2
3
6
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