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

Test: Design Of Absorption Tower (NTU, HTU, HETP) for Chemical Engineering 2024 is part of Mass Transfer 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.
Solutions of Test: Design Of Absorption Tower (NTU, HTU, HETP) questions in English are available as part of our Mass Transfer for Chemical Engineering & Test: Design Of Absorption Tower (NTU, HTU, HETP) solutions in Hindi for Mass Transfer course. Download more important topics, notes, lectures and mock test series for Chemical Engineering Exam by signing up for free. Attempt Test: Design Of Absorption Tower (NTU, HTU, HETP) | 10 questions in 20 minutes | Mock test for Chemical Engineering preparation | Free important questions MCQ to study Mass Transfer for Chemical Engineering Exam | Download free PDF with solutions
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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