Download GTU BE/B.Tech 2019 Summer 4th Sem New 2142105 Heat And Mass Transfer In Metallurgy Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2142105 Heat And Mass Transfer In Metallurgy Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2142105 Date:15/05/2019
Subject Name: Heat and Mass Transfer in Metallurgy
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Briefly explain laminar and turbulent flow. 03
(b) Explain Steady-Unsteady and Uniform-Non uniform flow. 04
(c) Explain Newton?s law of viscosity and get unit for proportionality constant.
Also classify and explain different fluids.
07

Q.2 (a) Define discharge and derive its units. 03
(b) Explain briefly pilot tube for flow rate measuring equipment. 04
(c) Derive differential mass balance equation. 07
OR
(c) Derive Bernoulli?s equation by integration of Navier - Stokes equation. 07
Q.3 (a) Calculate discharge through pipe of 25 mm diameter through which water
of 1000 kg/m
3
is flowing with velocity of 2 m/sec.
03
(b) Explain briefly venturimeter for flow rate measuring equipment. 04
(c) Derive differential equation of motion in rectangular coordinate system. 07
OR
Q.3 (a) What is conduction? With example explain it. 03
(b) State Fourier law of heat conduction and derive unit of conductivity. 04
(c) Derive generalized equation of heat conduction in cartesian coordinate
system.
07
Q.4 (a) Define thermal resistance and get its units. 03
(b) Calculate heat flux if k is 0.23 w/m
2
for refractory wall of 46 mm thick
having temperature difference of 100 degree celsius.
04
(c) Derive equation for temperature profile in one dimension. 07
OR
Q.4 (a) State Newton?s law of cooling and get proportionality constant unit. 03
(b) Differentiate between free and forced convection. 04
(c) Derive relation for heat transfer between two bodies by radiation. 07
Q.5 (a) What is radiative heat transfer? Give example of radiative heat transfer. 03
(b) Define or explain emissivity, emissive power, black body and white body. 04
(c) Explain Plank?s and Wein?s law. 07
OR

Q.5 (a) What is mass transfer and different modes of mass transfer? 03
(b) Explain Fick? first law of diffusion and define diffusivity and get its units. 04
(c) Derive generalized mass diffusion equation. 07


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