GATE CH discipline:chemical-engineering PYQs & Answers — Page 2

Questions 11–20 of 650. Imported answers require independent review unless marked reviewed.

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

Your answerChoose one option.

apron conveyor

bucket conveyor

scraper conveyor

screw conveyor

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

Diagram for Chemical Engineering question 12

Your answerChoose one option.

to maintain a constant pressure in the vessel by throttling the pump outlet

to alert when high pressure is detected in the tank

to measure the average pressure in the vessel and display it locally

to regulate the flow from the vessel to downstream users

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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 following is equal to the emissivity of the body at a given wavelength?

Your answerChoose one option.

absorptivity of the body at the same wavelength

reflectivity of the body at the same wavelength

Stefan-Boltzmann constant

zero

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Which one of the following ratios does a Gashof number represent?

Your answerChoose one option.

buoyancy force to inertia force

buoyancy force to viscous force

viscous force to capillary force

viscous force to inertia force

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Consider a closed system of one mole of an ideal gas undergoing a polytropic process. The process follows

, where P is the pressure, V is the volume and n is a constant. If the process is isobaric, which one of the following is the value of n?

Your answerChoose one option.

the ratio of specific heat capacity at constant pressure to specific heat capacity at constant volume

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

Your answerChoose one option.

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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 is 120 kJ mol⁻¹. The activation energy of diffusion is 10 kJ mol⁻¹. Assuming Arrhenius temperature dependency for both reaction and diffusion, which one of the following is the true activation energy (in kJ mol⁻¹) of the reaction?

Your answerChoose one option.

110

130

230

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In a traditional continuous Kraft (Sulfate) pulping process, consider the following major steps:

Bleaching (BL), Chiping (CH), Debaking (DE), Digestion (DI), and Pulp Washing (WA).

Which one of the following is the CORRECT sequence of steps for this process?

Your answerChoose one option.

DE → BL → WA → DI → CH

DE → CH → DI → WA → BL

DE → CH → WA → DI → BL

DE → BL → WA → CH → DI

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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?

Your answerChoose one option.

Recycle eliminates the need for a purge stream.

Recycle reduces the concentration of inerts in the system.

Recycle increases the overall conversion.

Recycle decreases the overall conversion.

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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 does for butane. Consider the distillation sequence shown in the figure.

Diagram for Chemical Engineering question 20

Match the component labels in Group I with chemical species in Group II.

Group I	Group II
P. Component X	1. Butane
Q. Component Y	2. Butadiene
R. Component Z	3. Furfural

Your answerChoose one option.

P-1, Q-2, R-3

P-1, Q-3, R-2

P-2, Q-1, R-3

P-2, Q-3, R-1

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GATE CH discipline:chemical-engineering PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20