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Chemical Engineering Exam  >  Chemical Engineering Tests  >  Test: Design Of Absorption Tower (NTU, HTU, HETP) - Chemical Engineering MCQ

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Chemical Engineering MCQ


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10 Questions MCQ Test - Test: Design Of Absorption Tower (NTU, HTU, HETP)

Test: Design Of Absorption Tower (NTU, HTU, HETP) for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Test: Design Of Absorption Tower (NTU, HTU, HETP) questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Design Of Absorption Tower (NTU, HTU, HETP) MCQs are made for Chemical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Design Of Absorption Tower (NTU, HTU, HETP) below.
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Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 1
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 For the Absorber design the plotting with mole ratio helps to find the

Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 1

Explanation: The plot with mole fraction will give an operating line as a curve; it will be very difficult to find the slope of the operating line. Therefore the use of mole ratio plot will give us a liner operating line.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 2
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The equation helps us to find the number of trays in an absorber theoretically is _________

Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 2

Explanation: Kremser brown derived an equation for determining the number of stages.

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Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 3
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Absorption factor increases equipment cost decreases

Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 3

Explanation: If absorption factor increases, the number of trays decreases. So the cost decreases.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 4
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Find the Absorption factor from the given figure,
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 4

Explanation: Absorption factor= slope of operating line /slope of equilibrium line.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 5
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Packed towers are _____________
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 5

Explanation: Packing is just to increase the contact time. Packed towers are used for both absorption and stripping process.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 6
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 Packing height in the packed tower = NTU x __________
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 6

Explanation: HETP- Height equivalent to theoretical plates. It is a packing value, to determine the packing height.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 7
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Will the Height equivalent theoretical plates changes with flow rates?
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 7

Explanation: Flow rates affect the absorption rates.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 8
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 Find the absorption tower height if
Number of gas phase transfer units 4.09
Height of gas phase transfer units 1.5 meters
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 8

Answer: Height of the absorption tower = HTUx NTU
= 4.09 x 1.5
= 6.135 meters.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 9
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Find the HTU if gas rate is 0.07 kmol/sq.m s and the Fg* a ( F type mass transfer co-efficient) is 0.06 kmol/ cu.m s.
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 9

Explanation: HTU= Gas rate/ Fg*a = 0.07/0.06 = 1.167.

Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 10
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Kremser brown equation will be invalid for gas phase transfer units if operating and equilibrium line has same slope.
Detailed Solution for Test: Design Of Absorption Tower (NTU, HTU, HETP) - Question 10

Explanation: When the operating line and equilibrium line having the same slope then absorption factor becomes 1. So kremser Brown equation for both gas and liquid phase transfer units becomes invalid.

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