Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 3131307 Basics Of Environmental Hydraulics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3131307 Date: 3/12/2019
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.
Q.1 (a) Define & Explain (i) Mass density (ii) Specific Weight (iii) Viscosity 03
(b) Write a short note on Piezometer. 04
(c) Explain the different types of fluids with figure. 07
Q.2 (a) State Bernoulli?s theorem and write down the assumptions for it. 03
(b) Explain with sketch the relationship between various types of pressure. 04
(c) Derive an expression for equation of continuity in a 3D flow in Cartesian co-
ordinates system.
07
OR
(c) Derive an expression for Euler?s equation of motion. 07
Q.3 (a) Give the classification of Orifices. 03
(b) Specific gravity of a liquid is 0.7 Find i) Mass density ii) specific weight.
Also find the mass and weight of 10 Liters of liquid.
04
(c) State and explain the Pascal?s law. 07
OR
Q.3 (a) Give the classification of mouthpieces. 03
(b) An oil is used for lubrication between a
square plate of size 0.9 m X 0.9 m and an
inclined plane with angle of inclination
30
0
as shown in figure. The weight of the
square plate is 400 N and its slides down
the inclined plane with a uniform
velocity of 0.4 m/s. the thickness of oil
film is 1.5 mm. Determine the dynamic
viscosity of an oil.
04
(c) State and explain the Hydrostatic law. 07
Q.4 (a) What is vena-contracta and how does it occur? 03
(b) Give the classification of the various energy (Major & Minor) losses in pipe. 04
(c) A horizontal venturimeter with inlet diameter 150 mm and throat diameter 75
mm is employed to measure the discharge of water. The differential
manometer connected to the inlet gives reading of 150 mm of mercury.
Determine the rate of flow if the co-efficient of discharge is 0.98.
07
OR
Q.4 (a) Compare steady, unsteady, rotational and irrotational flow. 03
(b) Explain EGL and HGL. 04
(c) The water is flowing through a tapering pipe having diameter 250 mm and
125 mm at section 1 and 2 respectively. The discharge through the pipe is
30liters/sec. the section 1 is 9m above datum and section 2 is 5m above
datum. Determine the intensity of pressure at section 2 if that at section 1 is
440 kN/m
2
.
07
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Page 1 of 2
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3131307 Date: 3/12/2019
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.
Q.1 (a) Define & Explain (i) Mass density (ii) Specific Weight (iii) Viscosity 03
(b) Write a short note on Piezometer. 04
(c) Explain the different types of fluids with figure. 07
Q.2 (a) State Bernoulli?s theorem and write down the assumptions for it. 03
(b) Explain with sketch the relationship between various types of pressure. 04
(c) Derive an expression for equation of continuity in a 3D flow in Cartesian co-
ordinates system.
07
OR
(c) Derive an expression for Euler?s equation of motion. 07
Q.3 (a) Give the classification of Orifices. 03
(b) Specific gravity of a liquid is 0.7 Find i) Mass density ii) specific weight.
Also find the mass and weight of 10 Liters of liquid.
04
(c) State and explain the Pascal?s law. 07
OR
Q.3 (a) Give the classification of mouthpieces. 03
(b) An oil is used for lubrication between a
square plate of size 0.9 m X 0.9 m and an
inclined plane with angle of inclination
30
0
as shown in figure. The weight of the
square plate is 400 N and its slides down
the inclined plane with a uniform
velocity of 0.4 m/s. the thickness of oil
film is 1.5 mm. Determine the dynamic
viscosity of an oil.
04
(c) State and explain the Hydrostatic law. 07
Q.4 (a) What is vena-contracta and how does it occur? 03
(b) Give the classification of the various energy (Major & Minor) losses in pipe. 04
(c) A horizontal venturimeter with inlet diameter 150 mm and throat diameter 75
mm is employed to measure the discharge of water. The differential
manometer connected to the inlet gives reading of 150 mm of mercury.
Determine the rate of flow if the co-efficient of discharge is 0.98.
07
OR
Q.4 (a) Compare steady, unsteady, rotational and irrotational flow. 03
(b) Explain EGL and HGL. 04
(c) The water is flowing through a tapering pipe having diameter 250 mm and
125 mm at section 1 and 2 respectively. The discharge through the pipe is
30liters/sec. the section 1 is 9m above datum and section 2 is 5m above
datum. Determine the intensity of pressure at section 2 if that at section 1 is
440 kN/m
2
.
07
Page 2 of 2
Q.5 (a) Differentiate between Notch and Weir 03
(b) Find the discharge through a trapezoidal notch which is 1.2 m wide at the top
and 0.5 m at the bottom and is 0.4 m in height. The head of water on the notch
is 0.3 m. Cd for rectangular = 0.62 and Cd for triangular=0.6.
04
(c) What do you mean by ?Most economical section? of an open channel? How
it is determined? What are the conditions for the rectangular channel for best
conditions?
07
OR
Q.5 (a) Give the advantages of triangular notch over a rectangular notch. 03
(b) A rectangular orifice of 1.6 m width and 1 m deep is fitted in one side of a
large tank. The water level on one side of the orifice is 3.5 m above the top
edge of the orifice, while on the other side of the orifice, the water level is 0.4
m below its top edge. Find the discharge through the orifice if Cd = 0.63.
04
(c) Explain the different types of open channel flow in detail. 07
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This post was last modified on 20 February 2020