GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Code: 3140110 Date: 09/02/2021
Subject Name: Fluid Mechanics
Time: 02:30 PM TO 04:30 PM Total Marks: 56
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BE- SEMESTER-IV (NEW) EXAMINATION - WINTER 2020Subject Code: 3140110 Date: 09/02/2021
Subject Name: Fluid Mechanics
Time: 02:30 PM TO 04:30 PM Total Marks: 56
Instructions:
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- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Marks | |
| Q.1 (a) Define: Specific Gravity, Density, Specific Volume. | 03 |
| (b) Define the following: e Newtonian & Non-Newtonian Fluid --- Content provided by FirstRanker.com --- e Compressibility & bulk Modulus | 04 |
| (c) Classify different types of Manometer. Make use of Pascal’s law to explain working of U-tube manometer. | 07 |
| Q.2 (a) Define: Total Pressure, Centre of Pressure and buoyancy. | 03 |
| (b) Define Surface Tension. Show its relationship with pressure for liquid droplet. | 04 |
| (c) Identify the conditions for stability of floating body. | 07 |
| Q.3 (a) Define Metacenter, Metacentric height. | 03 |
| (b) A cylindrical block weighs 22kN having diameter of 2m and height 2.5m is to float in sea water having specific gravity 1.025. Show that it does not float vertically. | 04 |
| (c) Classify different types of fluid flow. | 07 |
| Q.4 (a) Compare Eulerian and Lagrangian frame of reference. | 03 |
| (b) Differentiate Ideal and Real Fluids. | 04 |
| (c) Derive Continuity equation for 2-D & 3-D flow in Cartesian coordinate system. | 07 |
| Q.5 (a) Explain terms Circulation and Vorticity. | 03 |
| (b) Evaluate an expression for Discharge over a Triangular notch. | 04 |
| (c) Explain Velocity potential and Potential flow. | 07 |
| Q.6 (a) Explain Bernoulli’s equation for real fluid. | 03 |
| (b) Explain working of Pitot Tube. | 04 |
| (c) Explain Buckingham’s p theorem in detail. | 07 |
| Q.7 (a) What is Reynold’s Number? Explain its physical significance. | 03 |
| (b) Derive an expression for power absorbed in Journal bearing. | 04 |
| (c) Derive an expressions shear stress and velocity for HAGEN-POISEVILLE LAW. | 07 |
| Q.8 (a) Define Laminar Sub layer. | 03 |
| (b) Explain Laminar and Turbulent boundary layer. | 04 |
| (c) A pipe of diameter 20 cm and length 2000 m connects two reservoirs having difference of water levels as 20 m. Determine the discharge through pipe. If an additional pipe of diameter 20 cm and length 1200 m is attached to the 1200 m length of the existing pipe, find the increase in the discharge. Take f= 0.015 and neglect minor losses. | 07 |
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