Chemical Engineering

The velocity profile for a fully developed laminar flow of an incompressible Newtonian fluid, at steady state, through a horizontal infinitely wide and long sli

Cyclohexane (C_6H_12) is produced from benzene (C_6H_6) and hydrogen (H_2) according to the following reaction: … In this process, the overall and single-pass c

The data given in the table are fitted to the equation y = mx using the method of least squares. The value of m is ______ (rounded off to one decimal place). x:

Consider the differential equation: … With the initial conditions at x = 1: … … The value of y at x = 2 is ______ (rounded off to two decimal places).

The flooding velocity curves for two different structured packings are shown in the figure. The ratio of mass velocities of liquid (G_x) to that of the gas (G_y

Consider a two-dimensional, steady, laminar flow of an incompressible fluid with zero pressure gradient, over a thin horizontal flat plate of length 2 m. The fr

When a cylindrical capillary glass tube, open at both ends, is vertically inserted in a pool of water, the water level in the tube rises to 7 cm relative to the

A gas mixture of 50 wt. % argon and 50 wt. % helium flowing through a horizontal tube of uniform diameter at a rate of 1 kg s^-1 is heated from 300 K to 400 K a

A feed containing 10 mol % propylene, 15 mol % ammonia and rest air is charged into a reactor to produce acrylonitrile (C_3H_3N) according to the following reac

A first-order homogeneous liquid-phase reaction (A B) occurs in a non-ideal isothermal reactor operating at steady state. The variance (^2) of residence time di

A first-order homogeneous liquid-phase reaction (A B) occurs in an adiabatic, ideal mixed flow reactor operating at steady state. The volumetric flow rate of th

Methanol is formed by the following gas phase homogeneous reaction: … The standard Gibbs free energies of formation at 298 K for CO and CH_3OH are -137 kJ mol^-

A pipe with outer diameter of 0.02 m, carries hot water. The temperature at the outer surface of the pipe is 70 ^C. This pipe is covered with two concentric lay

In a double pipe cocurrent heat exchanger, operating at steady state, oil (specific heat capacity = 2100 J kg^-1 ^C^-1) entering at 7 kg s^-1 at 100 ^C is used

A thermometer initially at a steady temperature of 30 ^C is inserted in a water bath maintained at 90 ^C. The initial rate of temperature rise of the thermomete

Consider three identical non-interacting first order processes in series, each having unit gain and a time constant of 2 min. Tuning of proportional controller

Laboratory filtration is conducted at constant pressure drop of 200 kPa on a slurry of CaCO_3 in water at room temperature. The time taken to collect filtrate i

A gas stream with 2.01 mol % ammonia is to be scrubbed in a counter-current isothermal packed bed absorber using pure water to reduce its concentration to 0.01

A continuous distillation column is used to separate an equimolar mixture of diethylamine (DEA) and methanol. The feed enters the column as saturated liquid at

In a certain project, 15% of the total investment is the working capital. The minimum acceptable rate of return is 4.95% and the period of evaluation is 15 year

The gross energy requirement, to reduce a very large feed of coal to such a size that 80% of the product passes through a 100 m screen, is 13 kWh per ton of fee

A control valve with hyperbolic characteristics has a turndown ratio (ratio of maximum flow to minimum controllable flow) of 50. The flow rate through the valve

The reaction rate constants of two reactions follow Arrhenius’ law. The activation energies of Reaction 1 and Reaction 2 are E_1 and E_2, respectively and E_1 <

Consider the following homogeneous isothermal liquid-phase parallel reactions carried out in three reactor configurations (having identical volumes and same ope

Consider the following curve in polar coordinates: … Which one of the following is the area enclosed by the curve for 0 2?

Consider the following complex numbers: … … where r_1, r_2 are real numbers, 0 _1 2, 0 _2 2, and i = -1. If |z_1 + z_2| = |z_1| + |z_2|, which one of the follow

A volatile organic compound (VOC) is to be adsorbed from air onto a bed of activated carbon. The equilibrium capacity of activated carbon at the feed conditions

Vapor pressure of water at various temperatures is given in the table below: … An air and water vapor mixture at 100 kPa with a relative humidity of 20% has a d

Consider a flow with the following velocity field: … where i, j and k are the unit vectors in the x, y and z directions, respectively. Which one of the followin

K value is defined as the ratio of mole fraction of a component in the vapor phase to that in the liquid phase. The K values of propane and iso-butane at 293 K

Using the single-step trapezoidal rule, the value of … is ______ (rounded off to two decimal places).

An experiment is performed by rolling an unbiased die once. Events A and B are defined as follows: Event A: The outcome of the rolled die is a prime number. Eve

Consider a non-reactive binary mixture of two ideal gases A and B in an isothermal horizontal closed tube. Due to the concentration difference at the two ends o

Water is discharged from vertical side of a tank through a circular orifice of diameter 2 cm under laminar flow conditions. The water surface in the tank is mai

Consider a homogeneous gas phase reaction, A + 2B 2C + 3D, occurring at constant temperature and pressure in a varying volume batch reactor. The vessel is initi

Consider two successive screen sizes in the Tyler standard screen scale, viz. 150 meshes per inch and 200 meshes per inch. Their linear sizes of the openings ar

Which of the following methods for calculating profitability does/do NOT consider the time value of money?

In which of the following condition(s), Bernoulli’s equation is applicable?

Which of the following statements regarding the heat of reaction is/are CORRECT?

Urea has its major use as a solid fertilizer for nitrogen fixation. Which of the following is/are other application(s) of urea?

A process exhibits an inverse response to a step input. Which of the following statements is/are necessarily TRUE about the process?

Which one of the following is produced by catalytic reforming of straight run gasoline and naphtha?

Which one of the following is the pair of eigenvalues of the matrix [matrix-3 44 3matrix] ?

Which one of the following is the value of _x 0 e^x - x - 1 x - 1 ?

A two-dimensional temperature profile is given as T = 2x^2 + 3xy + y^2 are the unit vectors along x and y directions, respectively, which one of the following i

A binary mixture of butane and butadiene is to be separated in an extractive distillation using furfural. Furfural lowers the activity of butadiene more than it

For an irreversible reaction containing inerts in the feed, single-pass conversion in a reactor is 70%. Which one of the following statements is CORRECT?

In a traditional continuous Kraft (Sulfate) pulping process, consider the following major steps: Bleaching (BL), Chipping (CH), Debarking (DE), Digestion (DI),

An irreversible chemical reaction occurs on a porous catalyst. All the pores are of same size. In strong pore diffusion regime, the observed activation energy i

According to the phase rule, which one of the following is the number of degrees of freedom for pure water at its triple point?

Consider a closed system of one mole of an ideal gas undergoing a polytropic process. The process follows P V^n = constant, where P is the pressure, V is the vo

Which one of the following ratios does Grashof number represent?

A body is placed inside a perfectly black enclosure and is allowed to reach thermal equilibrium. According to the Kirchhoff’s identity, which one of the followi

In the P&ID shown below, which one of the following is the function of PAH in the process?

Which one of the following is NOT a type of chain conveyor?

“He often _____ the numbers. False claims are not going to help. Honesty _____ trust”, said the manager. Choose the option with the correct order of words to fi

In the sequence of tiles shown below, the missing tile indicated by the question mark should be …

A school has 100 students distributed among 1st to 10th standards. Based on this, which one of the following statements is always correct?

How many 3-digit numbers can be formed using three distinct single digit prime numbers?

In a group of students, 10 students like Mathematics, 12 students like English, 4 students like both Mathematics and English, and 6 students like neither Mathem

Charity : P :: Retaliation : Q Choose the appropriate pair of words P and Q that fit the analogy.

A paper shown in Panel I is folded along the dashed lines (- - -) to construct a cube. The shaded regions shown in Panel I appear on the outer surface of the cu

Consider the cube shown below with its 8 corners labelled a, b, c, d, e, f, g, and h. The figure is representative. All corners are to be colored such that any

Four hills H1, H2, H3, and H4 are present in an area. The following observations are made about them: i. Neither H2 nor H3 is the easternmost hill. ii. Neither

As shown in the figure, circle C_1 with center O_1 and radius r_1 touches the square VWXY at points P and Q while circle C_2 with center O_2 and radius r_2 touc