Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2160602 Applied Fluid Mechanics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2160602 Date:14/05/2019
Subject Name:Applied Fluid Mechanics
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) Explain the terms: Hydraulic gradient line and Total energy line. 03
(b) Derive an expression for the loss of head due to sudden
enlargement of a pipe.
04
(c) Prove that the velocity distribution for viscous flow between two
parallel plates when both plates are fixed across a section is
parabolic in nature.
07
Q.2 (a) Explain the terms: Pipes in parallel and Equivalent pipe. 03
(b) Derive an expression for the loss of head due to friction in pipe. 04
(c) Explain the term hydraulic jump. Derive an expression for the
depth of hydraulic jump in terms of the upstream Froude number.
07
OR
(c) Draw specific energy curve. Also derive expressions for critical
depth and critical velocity.
07
Q.3 (a) Explain laminar boundary layer. 03
(b) Derive an expression for the momentum thickness (?) of boundary
layer flow.
04
(c) Explain Froude model law. Obtain scale ratio for time, acceleration
and discharge for the Froude model law.
07
OR
Q.3 (a) Define: Inertia force, Viscous force and Gravity force. 03
(b) Explain the Buckingham?s ?-theorem in dimensional analysis. 04
(c) Explain boundary layer separation. Also discuss the effect of
pressure gradient on boundary layer separation.
07
Q.4 (a) What is priming? Why it is necessary. 03
(b) Draw a layout of hydroelectric plant and explain different
components of hydroelectric plant.
04
(c) A Francis turbine of 1.2 metre runner diameter working under a
head of 5 metres at a speed of 200 rpm develops 70 kW when the
rate of flow of water is 2 m
3
/s. If the head on the turbine is
increased to 17 metre, determine the new speed, discharge and
power.
07
OR
Q.4 (a) Explain the efficiencies of turbine. 03
(b) Explain the principal and working of a centrifugal pump with a neat
sketch.
04
(c) A centrifugal pump delivers water against a net head of 15 m and
a design speed of 1000 rpm. The vanes are curved back to an angle
of 30
?
with the periphery. The impeller diameter is 250 mm and
outlet width 50 mm. determine the discharge of the pump if
manometric efficiency is 95%.
07
Q.5 (a) Explain the terms: affux, back water curve, unsteady flow. 03
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2160602 Date:14/05/2019
Subject Name:Applied Fluid Mechanics
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) Explain the terms: Hydraulic gradient line and Total energy line. 03
(b) Derive an expression for the loss of head due to sudden
enlargement of a pipe.
04
(c) Prove that the velocity distribution for viscous flow between two
parallel plates when both plates are fixed across a section is
parabolic in nature.
07
Q.2 (a) Explain the terms: Pipes in parallel and Equivalent pipe. 03
(b) Derive an expression for the loss of head due to friction in pipe. 04
(c) Explain the term hydraulic jump. Derive an expression for the
depth of hydraulic jump in terms of the upstream Froude number.
07
OR
(c) Draw specific energy curve. Also derive expressions for critical
depth and critical velocity.
07
Q.3 (a) Explain laminar boundary layer. 03
(b) Derive an expression for the momentum thickness (?) of boundary
layer flow.
04
(c) Explain Froude model law. Obtain scale ratio for time, acceleration
and discharge for the Froude model law.
07
OR
Q.3 (a) Define: Inertia force, Viscous force and Gravity force. 03
(b) Explain the Buckingham?s ?-theorem in dimensional analysis. 04
(c) Explain boundary layer separation. Also discuss the effect of
pressure gradient on boundary layer separation.
07
Q.4 (a) What is priming? Why it is necessary. 03
(b) Draw a layout of hydroelectric plant and explain different
components of hydroelectric plant.
04
(c) A Francis turbine of 1.2 metre runner diameter working under a
head of 5 metres at a speed of 200 rpm develops 70 kW when the
rate of flow of water is 2 m
3
/s. If the head on the turbine is
increased to 17 metre, determine the new speed, discharge and
power.
07
OR
Q.4 (a) Explain the efficiencies of turbine. 03
(b) Explain the principal and working of a centrifugal pump with a neat
sketch.
04
(c) A centrifugal pump delivers water against a net head of 15 m and
a design speed of 1000 rpm. The vanes are curved back to an angle
of 30
?
with the periphery. The impeller diameter is 250 mm and
outlet width 50 mm. determine the discharge of the pump if
manometric efficiency is 95%.
07
Q.5 (a) Explain the terms: affux, back water curve, unsteady flow. 03
2
(b) Differentiate between: (1) uniform flow and non-uniform flow (2)
laminar flow and turbulent flow
04
(c) A trapezoidal channel has side slopes of 3 horizontal to 4 vertical
and slope of its bed is 1 in 2000. Determine the optimum
dimensions of the channel if it is to carry water at 0.7 m
3
/s. Take
Chezy?s constant as 60.
07
OR
Q.5 (a) Explain the terms: open channel flow, steady flow, critical flow. 03
(b) Show that for trapezoidal channel of most economical section (1)
half of top width = length of one of the slopping side (2) hydraulic
mean depth =
1
2
depth of flow.
04
(c) The discharge of water through a rectangular channel of width 7.5
m is 20 m
3
/s when depth of flow of water is 1.5 m. Calculate: (1)
specific energy of the flowing water (2) critical depth and critical
velocity (3) value of minimum specific energy.
07
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This post was last modified on 20 February 2020