Download GTU BE/B.Tech 2019 Summer 5th Sem New 2154002 Fluid Mechanics And Hydraulics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem New 2154002 Fluid Mechanics And Hydraulics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2154002 Date: 03/06/2019

Subject Name: Fluid Mechanics and 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 and explain the terms: (i) Water Hammer; (ii) Hydraulic Gradient Line;
(iii) Total Energy Line.
07
(b) Explain the phenomenon of capillarity. Obtain an expression for capillary rise
of a liquid.
07

Q.2 (a) In view of open channel flow, Differentiate: (i) Uniform and non-uniform flow;
(ii) Laminar and turbulent flow; (iii) Critical, sub-critical and supercritical flow;
(iv) Rapidly varied and gradually varied flow.
07
(b) What is manometer? Describe any one in detail. 07
OR
(b) Define pressure. Derive an expression for pressure intensity at a point in a fluid.
Why the pressure is a scalar quantity?
07

Q.3 (a) How are the weirs and notches classified? Derive the expression for the
discharge through a trapezoidal notch or weir.
07
(b) Prove that streamlines and equipotential lines are orthogonal. 07
OR
Q.3 (a) Describe the construction, operation and use of pitot tube using neat sketch. 07
(b) Explain following terms with neat sketch:
(1) Stream line (2) Path line (3) Streak line (4) Stream Tube.
07

Q.4 (a) Explain the principle of venturimeter with a neat sketch and derive the
expression for the rate of flow of fluid through venturimeter.
07
(b) What is specific energy curve for open channel flow? Draw specific energy
curve, and then derive expressions for critical depth and critical velocity.
07
OR
Q.4 (a) Elucidate the importance of hydraulic coefficients. Define: (i) Co-efficient of
velocity; (ii) Co-efficient of contraction and (iii) Co-efficient of discharge.
07
(b) Find an expression for loss of energy head for a hydraulic jump in open channel
flow.
07

Q.5 (a) Draw and discuss the operating characteristics of centrifugal pumps. 07
(b) Derive equation for head loss due to friction (Darcy-Weisbach Equation) in
flow through pipes.
07
OR
Q.5 (a) What do you mean by gross head, net head and efficiency of turbine? Explain
the different types of the efficiencies of a turbine.
07
(b) Derive an expression for the loss of head due to (i) Sudden enlargement and (ii)
Sudden contraction of a pipe.
07

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