Chemical Engineering GATE 2017 Questions with Answer

Ques 1 Chemical Engineering Economics

The cost of a new pump (including installation) is 24,000 Rupees. The pump has a 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

Ques 2 Chemical Engineering Economics

A 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

Ques 3 Chemical Engineering Economics

The total cost (C_T) of an equipment in terms of the operating variables x and y is C_T = 2x + 12000/(xy) + y + 5 The optimal value of C_T, rounded to 1 decimal place, is

Ques 4 Chemical Reaction Engineering

The following reaction rate curve is shown for a reaction A → P. Here, (-r_A) and X_A 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)?

Ques 5 Chemical Reaction Engineering

Consider a first order catalytic reaction in a porous catalyst pellet. Given R - characteristic length of the pellet; D_e - effective diffusivity; k_c - mass transfer coefficient; k₁ - rate constant based on volume of the catalyst pellet; C_s - concentration of reactant on the pellet surface. The expression for Thiele modulus is

Ques 6 Chemical Reaction Engineering

For a solid-catalyzed gas phase reversible reaction, which of the following statements is ALWAYS TRUE?

Ques 7 Chemical Reaction Engineering

Reaction 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 325°C. 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 flowrate of B leaving the reactor, rounded to 2 decimal places, is

Ques 8 Chemical Reaction Engineering

The C-curve 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.

Ques 9 Chemical Reaction Engineering

The following liquid phase second-order reaction is carried out in an isothermal CSTR at steady state
A → R (-r_A) = 0.005 C_A² mol/m³.hr
where C_A is the concentration of the reactant in the CSTR. The reactor volume is 2 m³, the inlet flowrate 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

Ques 10 Chemical Reaction Engineering

The following gas-phase reaction is carried out in a constant-volume isothermal batch reactor
A + B → R + S
The reactants A and B as well as the product S are non-condensable 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 C_A,0 = C_B,0 = 12.5 mol/m³. The rate of reaction is given by (-r_A) = 0.08 C_A C_B mol/m³.s. The time at which R just starts condensing, rounded to 1 decimal place, is

Ques 11 Chemical Technology

The DCDA (Double Contact Double Absorption) process is used for the manufacture of

Ques 12 Chemical Technology

The purpose of methanation reaction used in ammonia plants is to

Ques 13 Chemical Technology

Match the equipment in Group-1 with the process in Group-2 Group-1