GATE CH 2024 Paper 1 — page 8

Questions 22–24 of 65. Imported answers require review unless explicitly marked reviewed.

Consider the block diagram in the figure with control input

, disturbance

and output

. For the feedforward controller, the ordered pair

Diagram for Chemical Engineering question 22

Your answerChoose one option.

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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,

Diagram for Chemical Engineering question 23

Your answerChoose one option.

negative, negative

negative, positive

positive, positive

positive, negative

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Which one of the given statements is correct with reference to gas-liquid contactors for mass transfer applications?

Your answerChoose one option.

A tray tower is more suitable for foaming systems than a packed tower.

Tray towers are preferred over packed towers for systems requiring frequent cleaning.

For a given liquid flow rate, the gas flow rate in the loading region is greater than that in the flooding region.

Flooding can never occur for counter-current contact.

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2024 · Paper 1

Question 22

Question 23

Question 24