Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2153507 Elements Of Fluid Flow Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2153507 Date: 02/12/2019
Subject Name: Elements of Fluid Flow
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a)
Define Buckingham?s pi theorem?
03
(b)
What is the relationship between absolute, atmospheric and gauge pressure?
04
(c)
Mention the physical significance of Reynolds number. Calculate the Reynolds
number for flow for water flowing at 20?C in a pipe of 40 mm ID at the rate of 500
kg/min
07
Q.2 (a)
What is Newton?s law of Viscosity?
03
(b)
Explain Hydrodynamic Boundary layer.
04
(c)
Differentiate laminar and turbulent flow
07
OR
(c)
Discuss friction loss from sudden expansion and sudden expansion of cross section
of pipe through which incompressible fluid is flowing.
07
Q.3 (a)
Mention the different types of notches with the specific applications where they are
utilized.
03
(b)
What is drag? Mention the case of drag on a flat plate when it is aligned parallel to
the direction of flow of fluid.
04
(c)
Write the various representational forms of Bernoullis equation with corresponding
statements and units
07
OR
Q.3 (a) What is meant by sub sonic and supersonic flow? 03
(b) How U tube manometer is used to measure pressure difference across a pipe? 04
(c)
Explain Buckingham Pi theorem with an example for dimensional analysis
07
Q.4 (a) What is meant by streamlines? How it is different from streamtubes? 03
(b) Discuss the different states of equilibrium regarding the stability of floating
bodies
04
(c) Derive the equation of discharge for Venturimeter. 07
OR
Q.4 (a) What is static head, dynamic head & total head? 03
(b) Describe different hydraulic coefficients of Orifice. Develop a relationship
between them.
04
(c) Water is flowing through a pipe of 80mm diameter under a gauge pressure of
60 kPa with a mean velocity of 2m/s. Neglecting friction find the total head
if the pipe is 7m above datum line.
07
Q.5 (a) Describe any three properties of fluids with their respective units. 03
(b)
Write about (i) Steady flow (ii) Unsteady flow (iii) Compressible flow (iv) Potential
flow
04
(c)
Water is flowing through a pipe of 300mm in diameter branches into two
pipes of 200 mm and 100 mm respectively. If the average velocities in 300mm
and 200 mm diameter pipe is 2.5m/s and 1.6 m/s, determine the velocity in
100 mm diameter pipe.
07
OR
Q.5 (a) Describe principle, construction and working of rotameter. 03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2153507 Date: 02/12/2019
Subject Name: Elements of Fluid Flow
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a)
Define Buckingham?s pi theorem?
03
(b)
What is the relationship between absolute, atmospheric and gauge pressure?
04
(c)
Mention the physical significance of Reynolds number. Calculate the Reynolds
number for flow for water flowing at 20?C in a pipe of 40 mm ID at the rate of 500
kg/min
07
Q.2 (a)
What is Newton?s law of Viscosity?
03
(b)
Explain Hydrodynamic Boundary layer.
04
(c)
Differentiate laminar and turbulent flow
07
OR
(c)
Discuss friction loss from sudden expansion and sudden expansion of cross section
of pipe through which incompressible fluid is flowing.
07
Q.3 (a)
Mention the different types of notches with the specific applications where they are
utilized.
03
(b)
What is drag? Mention the case of drag on a flat plate when it is aligned parallel to
the direction of flow of fluid.
04
(c)
Write the various representational forms of Bernoullis equation with corresponding
statements and units
07
OR
Q.3 (a) What is meant by sub sonic and supersonic flow? 03
(b) How U tube manometer is used to measure pressure difference across a pipe? 04
(c)
Explain Buckingham Pi theorem with an example for dimensional analysis
07
Q.4 (a) What is meant by streamlines? How it is different from streamtubes? 03
(b) Discuss the different states of equilibrium regarding the stability of floating
bodies
04
(c) Derive the equation of discharge for Venturimeter. 07
OR
Q.4 (a) What is static head, dynamic head & total head? 03
(b) Describe different hydraulic coefficients of Orifice. Develop a relationship
between them.
04
(c) Water is flowing through a pipe of 80mm diameter under a gauge pressure of
60 kPa with a mean velocity of 2m/s. Neglecting friction find the total head
if the pipe is 7m above datum line.
07
Q.5 (a) Describe any three properties of fluids with their respective units. 03
(b)
Write about (i) Steady flow (ii) Unsteady flow (iii) Compressible flow (iv) Potential
flow
04
(c)
Water is flowing through a pipe of 300mm in diameter branches into two
pipes of 200 mm and 100 mm respectively. If the average velocities in 300mm
and 200 mm diameter pipe is 2.5m/s and 1.6 m/s, determine the velocity in
100 mm diameter pipe.
07
OR
Q.5 (a) Describe principle, construction and working of rotameter. 03
2
(b) Define hydrostatic law and derive the equation for hydrostatic law. 04
(c) With a neat diagram explain the working principle of Rotameter 07
*************
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This post was last modified on 20 February 2020