Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 6th Sem 2160602 Applied Fluid Mechanics Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VI (NEW) EXAMINATION ? WINTER 2020
Subject Code:2160602 Date:22/01/2021
Subject Name:Applied Fluid Mechanics
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1
(a) Explain the terms: Pipes in parallel, Pipes in series and Equivalent
03
pipe.
(b) Write the differences between pipe flow and open channel flow.
04
(c)
Derive Darcy Weisbach formula for the loss of head due to
07
friction in pipe line.
Q.2
(a) Define the most economical channel section. Derive the condition
03
for rectangular channel of best section
(b) Derive Chezy's formula to calculate the velocity in case of a
04
channel.
(c)
Three pipes have been connected between the points A and B.
07
Total discharge between A and B is 200 lt/sec. Physical
characteristics of the pipes are,
f1 = f2 = f3 = 0.02
L1 = L2 = L3 = 1000 m
D1 = 0.10 m, D2 = 0.20 m, D3 = 0.30 m
Calculate the discharges of each pipe and calculate the head loss
between the points A and B. Draw the energy line of the system.
Q.3
(a) Enlist the important applications of Navier-stoke equations
03
(b) Discuss the phenomenon of boundary layer separation
04
(c) Explain with diagram the Specific Energy Curve and Discharge
07
Curve and derive the mathematical expression for minimum
specific energy and maximum discharge in terms of depth of flow
Q.4
(a) Differentiate between: (1) uniform flow and non-uniform flow (2)
03
laminar flow and turbulent flow
(b) Show that for trapezoidal channel of most economical section (1)
04
half of top width = length of one of the slopping side (2) hydraulic
mean depth = ? depth of flow.
1
(c) What is displacement Thickness? Derive the expression for
07
displacement thickness of boundary layer flow
Q.5
(a) Explain Froude model law
03
(b) Compare Impulse turbine and Reaction Turbine.
04
(c) What is afflux? Derive the expression for length of Back water
07
curve.
Q.6
(a) Explain various types of open channels with sketch
03
(b) What is cavitation? What are its effects? Give necessary
04
precaution against cavitations in pumps.
(c) Draw a general layout of a Hydroelectric power plant using an
07
impulse turbine and define the following:
1) Gross Head
2) Net Head
3) Hydraulic Efficiency
4) Overall Efficiency of Impulse turbine
Q.7
(a) Define: Inertia force, Viscous force and Gravity force.
03
(b) Explain the efficiencies of turbine.
04
(c) Explain the Buckingham's - theorem for dimensional analysis.
07
Q.8
(a) What are distorted and undistorted models? What are the
03
advantages of using distorted model?
(b) Explain the working of a pelton wheel
04
(c) Explain the term hydraulic jump. Derive an expression for the
07
depth of hydraulic jump in terms of the upstream Froude number.
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This post was last modified on 04 March 2021