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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (Old) EXAMINATION - WINTER 2019
Subject Code: 130602 Date: 28/11/2019 --- Content provided by FirstRanker.com ---
Subject Name: Fluid Mechanics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
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(a) What is orifice? Explain different methods to determine the coefficient of orifice. [07]
(b) What is mouthpiece? Explain convergent-divergent mouthpiece. [07]
Q.2
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(a) What is the difference between notch and weir? Classify the weirs based on geometry of flow section and based on sharpness of the crest. [07]
(b) Derive Darcy-Weisbach formula for the loss of head due to friction in the pipe line. [07]
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OR
(b) What is the difference between hydraulic gradient line and total energy line? Explain different types of losses for pipe flow. [07]
Q.3
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(a) What is hydro kinematics? Explain methods of describing fluid motion. [07]
(b) What is flow net? Describe different methods to obtain flow net in brief. [07]
OR
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Q.3
(a) State and derive Bernoulli’s theorem. Write its limitations. [07]
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(b) What is venturihead? Obtain the discharge equation for venturimeter. [07]
Q.4
(a) Explain different properties of fluid in brief. [07]
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(b) Differentiate between manometer and barometer. Explain different types of manometer. [07]
OR
Q.4
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(a) What is meant by centre of pressure? Obtain an expression for the depth of centre of pressure when the lamina is immersed in a liquid and is at an angle with the horizontal. [07]
(b) What is buoyancy? Define centre of buoyancy and metacenter. [07]
Q.5
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(a) Explain how the metacentric height of a floating body can be determined theoretically and experimentally. [07]
(b) Derive an continuity equation for three dimensional flow. [07]
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OR
Q.5
(a) What is compressible fluid flow? Derive an expression for velocity of pressure wave in the fluid. [07]
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(b) Explain the different cases of pressure wave propagation in compressible fluid. [07]
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