Download GTU BE/B.Tech 2019 Summer 3rd Sem Old 130101 Fluid Mechanics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 3rd Sem Old 130101 Fluid Mechanics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III(OLD) EXAMINATION ? SUMMER 2019
Subject Code: 130101 Date: 01/06/2019

Subject Name: Fluid Mechanics

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) Explain the following terms: (Any SEVEN)
1. Surface Tension 2. Cavitation
3. Non-Newtonian Fluid 4. Continuum
5. Buoyancy 6. Metacentre
7. Vorticity 8. Dynamic Similarity.
07
(b) Define and explain Viscosity and state Newtonian law of visicosity. 07

Q.2 (a) Enlist different types of manometers and explain the working of a differential
U-tube manometer.
07
(b) State and Prove Pascal?s law. 07
OR
(b) Derive an equation of pressure variation with respect to vertical axis in a fluid
under the gravity- Hydrostatic law.
07

Q.3 (a)
Define buoyant force, center of buoyancy, metacenter and metacentric height.
Also describe conditions of equilibrium for floating and submerged bodies.
07
(b) Derive equations for total force and center of pressure for vertical plane surface
immersed in a static liquid.
07
OR
Q.3 (a) Obtain an expression for continuity equation for a three dimensional flow. 07
(b)
Discuss different similarity conditions for the model similitude.
07

Q.4 (a) Derive Euler?s equation of motion along a stream line for an ideal fluid and
integrate it to get the Bernoulli?s equation.
07
(b)
Explain the construction and working of a Venturimeter and also derive an
expression for the discharge through it.
07

OR
Q.4 (a) Derive and sketch the velocity distribution for viscous flow through a circular
pipe. Using that prove that the ratio of maximum velocity to the average
velocity is 2.
07
(b) Define: Reynolds number and explain ?Reynolds? Experiment. 07

Q.5 (a) Derive an expression for the velocity of sound wave in a compressible fluid in 07
terms of change of pressure and change of density.
07
(b)
Explain: Mach cone, Zone of silence, stagnation pressure, adiabatic process.
Derive the energy equation for compressible flow in an adiabatic process.
07
OR

Q.5 (a) Derive Darcy-Weisbach equation for the loss of head due to friction in pipes. 07
(b) Differentiate between following fluid flow:
a) Steady and unsteady flow
b) Uniform and Non Uniform flow
c) Laminar and Turbulent flow
07
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