Download DBATU B.Tech 2019 Oct-Nov Chemical Engineering-CHEM 3rd Sem Mass Transfer Operation I Question Paper

DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE

Mid Semester Examination – Oct 2019

Course: B. Tech in - Chemical

--- Content provided by‍ FirstRanker.com ---

Subject Name: Mass Transfer Operation-I

Sem: III

Subject Code: BTCHC 502

Max Marks: 20

Duration: 1 Hr.

--- Content provided by​ FirstRanker.com ---

Date:- 24/09/2019

Instructions to the Students:

1. All questions are compulsory.
2. Question one are compulsory.
3. Assume suitable data wherever required.

--- Content provided by⁠ FirstRanker.com ---

4. Solve any two from question 2 and solve any one from question 3.
5. Attempt following Questions.

1. Ordinary diffusion process is also called ______ diffusion. A) pressure b) thermal c) concentration d) forced (Evaluation) (6 Marks)
2. Schmidt number is given by-----a) b) Re.Pec) Sh x Pe d) Re/Pe (Application)
3. The reciprocal of stripping factor is termed as a) selectivity index b) relative volatility c) absorption factor d) Murphree efficiency (Analysis)

--- Content provided by‍ FirstRanker.com ---

4. (Nre. Nsc) is termed in mass transfer operation as the ______ number a) Stanton b) Sherwood c) Peclet d) none of these (Remember)
5. The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an ______ law a) exponential b) parabolic c) linear d) cubic (Understand)
6. Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as a) K? Db) K&Dº5 c) K & D¹.5 d) K x D² (Understand)

2 Solve Any Two of the following.

1. What is process to Choose solvent for Absorption operation? (Remember)

--- Content provided by​ FirstRanker.com ---

2. Derive JA = -JB (Understand)
3. Explain term Cascade with their types. (Application) (32 Marks)

Q.3 Solve Any One of the following.

1. Derive Material Balance Equation for countercurrent flow Absorption Operation (Application)
2. Oxygen (A) is diffusing through carbon monoxide (B) under steady state conditions with carbon monoxide non diffusing. The total pressure is 1 * 105 N/m² and temperature 0°C. The partial pressure of oxygen at two planes 2 mm apart is respectively, 13000 and 6500 N/m². The diffusivity for the mixture is 1.87 * 105 m²/s. Calculate the rate of diffusion of oxygen in Kmol/s through each square meter of two planes. (Evaluation) (8 Marks)

--- Content provided by​ FirstRanker.com ---

*** End ***

Firstranker.com

Firstranker's choice

Co-Qus. Mapping

--- Content provided by⁠ FirstRanker.com ---