Download GTU BE/B.Tech 2019 Winter 4th Sem New 2141307 Basics Of Environmental Hydraulics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 4th Sem New 2141307 Basics Of Environmental Hydraulics Previous Question Paper

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2141307 Date: 12/12/2019

Subject Name: Basics of Environmental Hydraulics

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

Figures to the right indicate full marks.

Q.1 (a) Compare steady, unsteady, uniform and non-uniform flow. 03
(b) Write a short note on differential U-Tube Manometer.

04
(c) Explain the different types of fluids with figure. 07

Q.2 (a) Derive equation for Newton?s Law of Viscosity. 03
(b) State and prove Pascal?s Law. 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) Define: (i) Specific Weight (ii) Rotational Flow (ii) Atmospheric Pressure 03
(b) Discuss the concept of center of pressure. 04
(c) Give the classification of various energy (Major & Minor) losses in pipe. 07
OR
Q.3 (a) Define: (i) Mass density (ii) Laminar flow (iii) Absolute Pressure 03
(b) A vertical isosceles (two sides are same) triangular gate with its vertex up has
a base width 1 m and height 1.5 m. If the vertex of the gate is 1 m below the
free water surface, find (i) pressure force (ii) center of pressure.
04
(c) Derive the formula for loss of head due to sudden enlargement. 07

Q.4 (a) Explain the EGL and HGL. 03
(b) A rectangular channel of width 4 m is having a bed slope of 1in 1500. Find the
maximum discharge through the channel. Take value of C=50.
04
(c) The water is flowing through a tapering pipe having diameter 250mm and
125mm 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 450kN/m
2
.
07
OR
Q.4 (a) What is mouthpiece? Give the classification of mouthpiece. 03
(b) Explain the concept of velocity approach. 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

Q.5 (a) A rectangular notch 2 m wide has a constant head of 500 mm. Find the
discharge over the notch, if Cd=0.62.
03
(b) What are the differences between closed and open channel flow? 04
(c) Define large orifice. How is the discharge is calculated through large orifice? 07
OR
Q.5 (a) Determine the time required to lower the water level form 4 m to 3 m in a
reservoir of dimensions 80 m X 80 m, by a rectangular notch of length 1 m.
Take Cd= 0.62.
03
(b) Differentiate between Notch & Weir. 04
(c) Derive an expression for discharge over a triangular notch. 07

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