Metallurgical Engineering
GATE MT concept:mass-transfer-coefficients PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:mass-transfer-coefficients
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–2 of 2. Imported answers require independent review unless marked reviewed.
Question 8
Open questionMTMCQ1 markNeeds review
Consider electrodeposition of copper on a copper electrode from an aqueous solution containing
CuSO₄. Given: Faraday constant,
per gram equivalent. Assume transport of reactant is rate limiting, and mass transfer coefficient is
. The limiting current density (in
) isYour answerChoose one option.
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Open questionMTNAT2 marksNeeds review
A 50 mm (diameter) sphere of solid nickel is oxidized in a gas mixture containing 60% argon and 40% oxygen by volume. The rate of oxidation of nickel is controlled by the rate of transport of oxygen through the concentration boundary layer. The rate of oxidation (in moles of nickel per minute (mol/min), rounded off to two decimal places) is ________.
Given: Total pressure = 1 atm, Temperature = 1173 K; Concentration of oxygen at the surface of the solid = 0; Boundary layer mass transfer coefficient = 0.03
; Universal gas constant,
= 8.205
. Assume ideal gas behavior.Log in to check the answer
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