GATE CH topic:process-engineering PYQs & Answers — Page 24

Questions 231–240 of 650. Imported answers require independent review unless marked reviewed.

An exhibition was held in a hall on 15 August 2022 between 3 PM and 4 PM during which any person was allowed to enter only once. Visitors who entered before 3:40 PM exited the hall exactly after 20 minutes from their time of entry. Visitors who entered at or after 3:40 PM, exited exactly at 4 PM. The probability distribution of the arrival time of any visitor is uniform between 3 PM and 4 PM. Two persons

and

entered the exhibition hall independent of each other. Which one of the following values is the probability that their visits to the exhibition overlapped with each other?

Your answerChoose one option.

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Simpson’s one-third rule is used to estimate the definite integral

with an interval length of 0.5. Which one of the following is the CORRECT estimate of

obtained using this rule?

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Match the products in Group 1 with the manufacturing processes in Group 2 listed in the table below.

Group 1	Group 2
P) Acetaldehyde	I) Sulfate process
Q) Sulfuric acid	II) Electric furnace process
R) Pulp	III) Wacker process
S) Phosphorus	IV) Contact process

Your answerChoose one option.

P-III, Q-IV, R-I, S-II

P-III, Q-I, R-IV, S-II

P-IV, Q-I, R-II, S-III

P-I, Q-IV, R-II, S-III

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Match the reactions in Group 1 with the catalysts in Group 2 listed in the table below.

Group 1	Group 2
P)	I) Mixed oxide of Mo and Fe
Q)	II)
R)	III)
S) Naphthalene Phthalic Anhydride	IV)

Your answerChoose one option.

P-III, Q-IV, R-II, S-I

P-III, Q-IV, R-I, S-II

P-IV, Q-II, R-I, S-III

P-IV, Q-III, R-I, S-II

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Water in a container at 290 K is exposed to air containing 3 %

by volume. Air behaves like an ideal gas and is maintained at 100 kPa pressure. The liquid phase comprising of dissolved

in water behaves like an ideal solution. Use Henry’s constant of

dissolved in water at 290 K as 12 MPa. Under equilibrium conditions, which one of the following is the CORRECT value of the mole fraction of

dissolved in water?

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The enthalpy (

, in J.mol

) of a binary liquid system at constant temperature and pressure is given as

where

and

represent the mole fractions of species 1 and 2 in the liquid, respectively. Which one of the following is the CORRECT value of the partial molar enthalpy of species 1 at infinite dilution,

(in J.mol

Your answerChoose one option.

100

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Which one of the following represents the CORRECT effects of concentration polarization in a reverse osmosis process?

Your answerChoose one option.

Reduced water flux and reduced solute rejection

Increased water flux and increased solute rejection

Reduced water flux and increased solute rejection

Increased water flux and reduced solute rejection

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CO and H

participate in a catalytic reaction. The partial pressures (in atm) of the reacting species CO and H

in the feed stream are

and

, respectively. While CO undergoes molecular adsorption, H

adsorbs via dissociative adsorption, that is, as hydrogen atoms. The equilibrium constants (in atm

) corresponding to adsorption of CO and H

to the catalyst sites are

and

, respectively. Total molar concentration of active sites per unit mass of the catalyst is

(in mol.(g cat)

). Both the adsorption steps are at equilibrium. Which one of the following expressions is the CORRECT ratio of the concentration of catalyst sites occupied by CO to that by hydrogen atoms?

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A cascade control strategy is shown in the figure below. The transfer function between the output (

) and the secondary disturbance (

) is defined as

Which one of the following is the CORRECT expression for the transfer function

Diagram for Chemical Engineering question 44

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Level (

) in a steam boiler is controlled by manipulating the flow rate (

) of the make-up (fresh) water using a proportional (P) controller. The transfer function between the output and the manipulated input is

. The measurement and valve transfer functions are both equal to 1. A process engineer wants to tune the controller so that the closed-loop response gives decaying oscillations under servo mode. Which one of the following is the CORRECT value of the controller gain to be used by the engineer?

Your answerChoose one option.

0.25

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GATE CH topic:process-engineering PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45