Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2160602 Applied Fluid Mechanics Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2160602 Date:20/11/2018
Subject Name:Applied 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 various types of open channels with sketch 03
(b) Write the differences between pipe flow and open channel flow?
04
(c) Enlist the major and minor loses in pipes. Derive the expression for
loss of head due to sudden contraction.
07
Q.2 (a) Explain hydraulically smooth and rough pipes 03
(b) Define boundary layer, laminar sub-layer, displacement thickness
and momentum thickness
04
(c) Derive Darcy Weisbach formula for the loss of head due to
friction in pipe line.
07
OR
(c) Calculate the head loss due to friction using Darcy Equation and
power required to maintain 60 liters per second of liquid flow
through a steel pipe 0.08 m radius and 900 m long. Take Sp. Gravity
of the liquid = 0.85 and co-efficient of friction f=0.0025.
07
Q.3 (a) Write the assumptions made in derivation of the Dynamic Equation
of the Gradually varied flow
03
(b) Explain the Manning?s formula in open channel flow 04
(c) Explain with diagram the Specific Energy Curve and Discharge
Curve and derive the mathematical expression for minimum
specific energy and maximum discharge in terms of depth of flow
07
OR
Q.3 (a) Define
(i) Cavitation (ii) Prandtl Mixing length (iii) Water Hammer
03
(b) Enlist the important applications of Navier-stoke equations 04
(c) A trapezoidal channel is 4.5 m wide at bottom and has a side slope
of 0.5H: 1V. The bed slope of the channel is 0.0003. Find the
discharge of the most economical section. Assume Manning?s
coefficient n = 0.02
07
Q.4 (a) What is priming? Why is it necessary in centrifugal pump? 03
(b) Discuss the phenomenon of boundary layer separation. 04
(c) Define the most economical channel section. Derive the condition
for trapezoidal channel of best section
07
OR
Q.4 (a) Derive the expression for displacement thickness. 03
(b) Define hydraulic jump? Discuss the types of jump based on
Froude number
04
(c) A Francis turbine of 0.8 metre runner diameter working under a
head of 3.0 metres at a speed of 150 rpm develops 80 kW when the
rate of flow of water is 1.6 m
3
/s. If the head on the turbine is
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2160602 Date:20/11/2018
Subject Name:Applied 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 various types of open channels with sketch 03
(b) Write the differences between pipe flow and open channel flow?
04
(c) Enlist the major and minor loses in pipes. Derive the expression for
loss of head due to sudden contraction.
07
Q.2 (a) Explain hydraulically smooth and rough pipes 03
(b) Define boundary layer, laminar sub-layer, displacement thickness
and momentum thickness
04
(c) Derive Darcy Weisbach formula for the loss of head due to
friction in pipe line.
07
OR
(c) Calculate the head loss due to friction using Darcy Equation and
power required to maintain 60 liters per second of liquid flow
through a steel pipe 0.08 m radius and 900 m long. Take Sp. Gravity
of the liquid = 0.85 and co-efficient of friction f=0.0025.
07
Q.3 (a) Write the assumptions made in derivation of the Dynamic Equation
of the Gradually varied flow
03
(b) Explain the Manning?s formula in open channel flow 04
(c) Explain with diagram the Specific Energy Curve and Discharge
Curve and derive the mathematical expression for minimum
specific energy and maximum discharge in terms of depth of flow
07
OR
Q.3 (a) Define
(i) Cavitation (ii) Prandtl Mixing length (iii) Water Hammer
03
(b) Enlist the important applications of Navier-stoke equations 04
(c) A trapezoidal channel is 4.5 m wide at bottom and has a side slope
of 0.5H: 1V. The bed slope of the channel is 0.0003. Find the
discharge of the most economical section. Assume Manning?s
coefficient n = 0.02
07
Q.4 (a) What is priming? Why is it necessary in centrifugal pump? 03
(b) Discuss the phenomenon of boundary layer separation. 04
(c) Define the most economical channel section. Derive the condition
for trapezoidal channel of best section
07
OR
Q.4 (a) Derive the expression for displacement thickness. 03
(b) Define hydraulic jump? Discuss the types of jump based on
Froude number
04
(c) A Francis turbine of 0.8 metre runner diameter working under a
head of 3.0 metres at a speed of 150 rpm develops 80 kW when the
rate of flow of water is 1.6 m
3
/s. If the head on the turbine is
07
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2
increased to 10.5 metres determine the new speed, discharge and
power.
Q.5 (a) Discuss the types of the similarities. 03
(b) Compare Impulse turbine and Reaction Turbine. 04
(c) Explain construction and working of a pelton wheel 07
OR
Q.5 (a) Define: Mechanical efficiency and Hydraulic efficiency 03
(b) Discuss the Distorted and Undistorted Models. What are the merits
and demerits of Distorted Models?
04
(c) Explain the Buckingham?s ?- theorem for dimensional analysis 07
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This post was last modified on 20 February 2020