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Name of the College : Mahatma Gandhi University
Department : Mechanical Engineering
Subject Code/Name : MMETP 103/Advanced Heat and Mass Transfer
Sem : I
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5067-MMETP%20103.pdf

MGU Mass Transfer Question Paper

M-Tech Degree Examination :
First Semester :
Model question paper I :

Related / Similar Question Paper : MGU M.Tech Computer Integrated Manufacturing Question Paper

Branch: Mechanical Engineering
Specialization: Thermal Power Engineering
MMETP 103 – Advanced Heat and Mass Transfer
Answer All Questions
(Use of heat and mass transfer table is permitted)
Time: 3 hrs
Max. Marks: 100
1. Three sides of a thin rectangular plate are maintained at a constant temperature T1, while the fourth side is maintained at a constant temperature of T2 which is different form T1. Derive a general equation for temperature distribution along the plate. 25 Marks
OR

2. An iron plate (k= 60 W/mK), C= 0.46 kJ/kgK, a=1.6 x 10-5 m2/s) of 50 mm thickness is initially at 2250C. Suddenly, both surfaces are exposed to an ambient temperature of 250C with a a heat transfer coefficient of 500 W/m2K.

Calculate
a). The centre temperature at 2 min. after start of cooling
b). The temperature at a depth of 1 cm from the surface at two minute after the start of cooling and
c). The energy removed from the plate per sq.m. during this time. 25 Marks

3. Derive a correlation between Colburn’s j-factor and the local friction coefficient for flow over a flat plate for a Prandtl number equal to unity. 25 Marks
OR

4. Air at 200C and a pressure of 1bar is moving over a flat plate at a velocity of 3 m/s. If the plate is 280mm wide and at 560C, estimate the following quantities at x=280mm when the bulk mean temperature of air is 380C;

a). Boundary layer thickness,
b). Local friction coefficient,
c). Shear stress due to friction,
d). Thickness of thermal boundary layer,
e).Local convective heat transfer coefficient,
f). Rate of heart transfer by convection and
g). Total mass flow through the boundary. 25 Marks

5. A diffuse circular disc of diameter D and area Aj is kept parallel to a plane diffuse surface of area Ai <<Aj. Ai is located at a distance of L from the centre of Aj. Obtain an expression for the view factor Fij 25 Marks
OR

6. A spherical vessel of diameter 0.4 m encloses a gas mixture at a total pressure of P=2 atm. The gas mixture contains nitrogen at a partial pressure of 1 atm., water vapor at a partial pressure of 0.4 atm., and carbon dioxide at a partial pressure of 0.6 atm.

The gas is at a temperature of 800K, while the sphere surface is at 400K. The sphere is gray with an emissivity of e=0.5. Determine the radiant heat transfer to the shell. 25 Marks

7.Based on Nusselt’s assumptions, derive a correlation for the velocity profile of the condensate across its thickness, for film condensation process of pure vapors on a vertical plate. 25 Marks
OR

8. Helium gas is stored at 200C in a spherical container of fused silica (SiO2) which has a diameter of 0.20m and a wall thickness of 2mm. If the container is charged to an initial pressure of 4 bars, what is the rate at which this pressure decreases with time?.

Properties of helium fused silica at 293K are, a). Mass diffusion coefficient = 0.4x 10-13 m2/s and b). Solubility S= 0.45 x 10-3 kmol/m3 bar. ` 25 Marks

M-Tech Degree Examination :
First Semester :
Model question paper I :
Branch : Mechanical Engineering
Specialization : Thermal Power Engineering
MMETP 106 – 4 Cogeneration and Waste Heat Recovery : (Regular -2013 Admission )
Answer All Questions
Time : 3 hrs
Max. Marks : 100
1. a) What is mean by cogeneration, how it is different from combined cycle system.? 15 Marks
b) Classify cogeneration system based on the energy use and operating scheme. 10 Marks
OR
2. What are the sources of waste heat recovery? 25 Marks

3. Write notes on factors influencing cogeneration choice. 25 Marks
OR
4. Explain the following cogeneration system. 25 Marks
a) Steam turbine cogeneration system.
b) Gas turbine cogeneration system.
c) Reciprocating IC engine cogeneration system.