GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-IV(NEW) — EXAMINATION — SUMMER 2019
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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:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.No. | Question | Marks |
|---|---|---|
| Q.1 (a) | Briefly explain laminar and turbulent flow. | 03 |
| Q.1 (b) | Explain Steady-Unsteady and Uniform-Non uniform flow. | 04 |
| Q.1 (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 |
| Q.2 (b) | Explain briefly pilot tube for flow rate measuring equipment. | 04 |
| Q.2 (c) | Derive differential mass balance equation. | 07 |
| OR | ||
| Q.2 (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/m³ is flowing with velocity of 2 m/sec. | 03 |
| Q.3 (b) | Explain briefly venturimeter for flow rate measuring equipment. | 04 |
| Q.3 (c) | Derive differential equation of motion in rectangular coordinate system. | 07 |
| OR | ||
| Q.3 (a) | What is conduction? With example explain it. | 03 |
| Q.3 (b) | State Fourier law of heat conduction and derive unit of conductivity. | 04 |
| Q.3 (c) | Derive generalized equation of heat conduction in cartesian coordinate system. | 07 |
| Q.4 (a) | Define thermal resistance and get its units. | 03 |
| Q.4 (b) | Calculate heat flux if k is 0.23 W/m² for refractory wall of 46 mm thick having temperature difference of 100 degree celsius. | 04 |
| Q.4 (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 |
| Q.4 (b) | Differentiate between free and forced convection. | 04 |
| Q.4 (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 |
| Q.5 (b) | Define or explain emissivity, emissive power, black body and white body. | 04 |
| Q.5 (c) | Explain Plank’s and Wein’s law. | 07 |
| OR | ||
| Q.5 (a) | What is mass transfer and different modes of mass transfer? | 03 |
| Q.5 (b) | Explain Fick’ first law of diffusion and define diffusivity and get its units. | 04 |
| Q.5 (c) | Derive generalized mass diffusion equation. | 07 |
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