Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2141307 Basics Of Environmental Hydraulics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2141307 Date:15/05/2019
Subject Name: Basics of Environmental Hydraulics
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.
MARKS
Q.1 (a) Define: (i) specific gravity (ii) viscosity (iii) mass density 03
(b) Differentiate between: (i) ideal fluid and real fluid
(ii) cohesion and adhesion
()
04
(c) Explain phenomena of capillarity. Obtain an expression of capillary
rise of a liquid.
07
Q.2 (a) Define the term Total pressure and centre of pressure. 03
(b) A cylinder container has a diameter of 0.5 m and a height of 1 m. If it
is to be filled with a liquid having a specific weight of 2000 N/m
3
, how
many kg of this liquid must be added?
04
(c) Derive an Expression for the depth of centre of pressure when lamina
is immersed in a liquid at an angle with horizontal.
07
OR
(c) Discuss and derive an expression of discharge through partially
submerged orifice.
07
Q.3 (a) Differentiate between simple manometer and differential manometer. 03
(b) Explain with sketch the relationship between various types of pressure. 04
(c) Two tanks A and B have 70 m difference in water levels, and are
connected by a pipe 0.25 m diameter and 6 km long with 0.002 friction
coefficient. The pipe is tapped at its mid point to leak out 0.04 m3/s
flow rate. Minor losses are ignored. Determine the discharge leaving
tank A? Find the discharge entering tank B?
07
OR
Q.3 (a) State limitations in use of piezometer and simple u-tube manometer. 03
(b) Derive Euler?s equation of motion along streamline. Also state
assumption made.
04
(c) Two reservoirs have 6 m difference in water levels, and are connected
by a pipe 60 cm diameter and 3000 m long. Then, the pipe branches
into two pipes each 30 cm diameter and 1500 m long. The friction
coefficient is 0.01. Neglecting minor losses, determine the flow rates
in the pipe system?
07
Q.4 (a) Define: (i) Orifice, (ii) Notch and (iii) Weir 03
(b) Derive the equation for coefficient of discharge. 04
(c) Water is discharging through an external cylindrical mouthpiece of
diameter 120 mm under a constant head of 5 m. Calculate discharge
and absolute pressure head of water at vena-contracta. Take
atmospheric pressure head = 10.3 m of water, Cd = 0.855, Cc for vena
contracta = 0.62
07
OR
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2141307 Date:15/05/2019
Subject Name: Basics of Environmental Hydraulics
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.
MARKS
Q.1 (a) Define: (i) specific gravity (ii) viscosity (iii) mass density 03
(b) Differentiate between: (i) ideal fluid and real fluid
(ii) cohesion and adhesion
()
04
(c) Explain phenomena of capillarity. Obtain an expression of capillary
rise of a liquid.
07
Q.2 (a) Define the term Total pressure and centre of pressure. 03
(b) A cylinder container has a diameter of 0.5 m and a height of 1 m. If it
is to be filled with a liquid having a specific weight of 2000 N/m
3
, how
many kg of this liquid must be added?
04
(c) Derive an Expression for the depth of centre of pressure when lamina
is immersed in a liquid at an angle with horizontal.
07
OR
(c) Discuss and derive an expression of discharge through partially
submerged orifice.
07
Q.3 (a) Differentiate between simple manometer and differential manometer. 03
(b) Explain with sketch the relationship between various types of pressure. 04
(c) Two tanks A and B have 70 m difference in water levels, and are
connected by a pipe 0.25 m diameter and 6 km long with 0.002 friction
coefficient. The pipe is tapped at its mid point to leak out 0.04 m3/s
flow rate. Minor losses are ignored. Determine the discharge leaving
tank A? Find the discharge entering tank B?
07
OR
Q.3 (a) State limitations in use of piezometer and simple u-tube manometer. 03
(b) Derive Euler?s equation of motion along streamline. Also state
assumption made.
04
(c) Two reservoirs have 6 m difference in water levels, and are connected
by a pipe 60 cm diameter and 3000 m long. Then, the pipe branches
into two pipes each 30 cm diameter and 1500 m long. The friction
coefficient is 0.01. Neglecting minor losses, determine the flow rates
in the pipe system?
07
Q.4 (a) Define: (i) Orifice, (ii) Notch and (iii) Weir 03
(b) Derive the equation for coefficient of discharge. 04
(c) Water is discharging through an external cylindrical mouthpiece of
diameter 120 mm under a constant head of 5 m. Calculate discharge
and absolute pressure head of water at vena-contracta. Take
atmospheric pressure head = 10.3 m of water, Cd = 0.855, Cc for vena
contracta = 0.62
07
OR
2
Q.4 (a) Define following terms.: (1) Hydraulic gradient line, (2) Energy
gradient line, (3) Equivalent pipe
03
(b) Differentiate between triangular notch and rectangular notch. 04
(c) Derive an expression for time of emptying a circular horizontal tank
with an orifice at its bottom.
07
Q.5 (a) What is mouthpiece? Enlist the classification of mouthpiece. 03
(b) Derive an expression for time of emptying a tank with rectangular
weir.
04
(c) Determine the time required to lower the water level from 3 m to 2 m
in a reservoir of dimension 60m x 60m, by (i) a rectangular notch of
length 1m, (ii) a right angled V-notch. Take Cd = 0.62.
07
OR
Q.5 (a) Define open channel flow. Explain its types in detail. 03
(b) Compare the Open Channel Flow & Pipe Flow 04
(c) What do you mean by ?Most economical section? of an open channel?
How it is determine? What are the conditions for the rectangular
channel for best conditions?
07
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This post was last modified on 20 February 2020