Chemical Engineering GATE 2024 Questions with Answer

Ques 1 Chemical Engineering

A homogeneous azeotropic distillation process separates an azeotropic AB binary feed using a heavy entrainer, E, as shown in the figure. The loss of E in the two product streams is negligible so that E circulates around the process in a closedcircuit. For a distillation column with fully specified feed(s), given operating pressure, a single distillate stream and a single bottoms stream, the steady-state degrees of freedom equals 2. For the process in the figure with a fully specified AB feed stream and given column operating pressures, the steady-state degrees of freedom equals

Ques 2 Chemical Engineering

The ratio of the activation energy of a chemical reaction to the universal gas constant is 1000 K. The temperature-dependence of the reaction rate constant follows the collision theory. The ratio of the rate constant at 600 K to that at 400 K is

Ques 3 Chemical Engineering

The rate of a reaction A → B is 0.2 mol m⁻³ s⁻¹ at a particular concentration C_A1. The rate constant of the reaction at a given temperature is 0.1 m³ mol⁻¹ s⁻¹. If the reactant concentration is increased to 10 C_A1 at the same temperature, the reaction rate, in mol m⁻³ s⁻¹, is

Ques 4 Chemical Engineering

Two parallel first-order liquid phase reactions A →_k1 B and A →_k2 C are carried out in a well-mixed isothermal batch reactor. The initial concentration of A in the reactor is 1 kmol m⁻³, while that of B and C is zero. After 2 hours, the concentration of A reduces to half its initial value, and the concentration of B is twice that of C. The rate constants k₁ and k₂, in h⁻¹, are, respectively

Ques 5 Chemical Engineering

Consider the block diagram in the figure with control input 𝑢, disturbance 𝑑 and output 𝑦. For the feedforward controller, the ordered pair (𝐾, 𝛼⁄𝛽) is

Ques 6 Chemical Engineering

Consider the control structure for the overhead section of a distillation column shown in the figure. The composition controller (CC) controls the heavy key impurity in the distillate by adjusting the setpoint of the reflux flow controller in a cascade arrangement. The sign of the controller gain for the pressure controller (PC) and that for the composition controller (CC) are, respectively,

Ques 7 Chemical Engineering

In an ammonia manufacturing facility, the necessary hydrogen is generated from methane. The facility consists of the following process units - P: Methanator, Q: CO shift convertor, R: CO₂ stripper, S: Reformer, T: Ammonia convertor The correct order of these units, starting from methane feed is

Ques 8 Chemical Engineering

For the electrolytic cell in a chlor-alkali plant, which of the following statements is/are correct?

Ques 9 Chemical Engineering

Which of the following statements with reference to the petroleum/petrochemical industry is/are correct?

Ques 10 Chemical Engineering

Consider the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g) in a continuous flow reactor under steady-state conditions. The component flow rates at the reactor inlet are:
F_N2,0 = 100 mol s⁻¹,
F_H2,0 = 300 mol s⁻¹,
F_inert,0 = 1 mol s⁻¹.
If the fractional conversion of H₂ is 0.60, the outlet flow rate of N₂, in mol s⁻¹, rounded off to the nearest integer, is __________

Ques 11 Chemical Engineering

Consider a binary mixture of components A and B at temperature T and pressure P. Let V̄_A and V̄_B be the partial molar volumes of A and B, respectively. At a certain mole fraction of A, x_A, (∂V̄_A / ∂x_A)_T,P = 22 cm³ mol⁻¹
and
(∂V̄_B / ∂x_A)_T,P = −18 cm³ mol⁻¹ The value of x_A, rounded off to 2 decimal places, is __________

Ques 12 Chemical Engineering

The capital cost of a distillation column is Rs. 90 lakhs. The cost is to be fully depreciated (salvage value is zero) using the double-declining balance method over 10 years. At the end of two years of continuous operation, the book-value of the column, in lakhs of rupees, rounded off to 1 decimal place, is _______

Ques 13 Chemical Engineering

Alumina particles with an initial moisture content of 5 kg per kg dry solid are dried in a batch dryer. For the first two hours, the measured drying rate is constant at 2 kg m⁻² h⁻¹. Thereafter, in the falling-rate period, the rate decreases linearly with the moisture content. The equilibrium moisture content is 0.05 kg per kg dry solid and the drying area of the particles is 0.5 m² per kg dry solid. The total drying time, in h, to reduce the moisture content to half its initial value is ______