Download AKTU B-Tech 7th Sem 2015-2016 EBT 701 Down Stream Processing Question Paper

Code: 20A3301

II B. Tech I Semester (R20) Regular Examinations Dec-2021/Jan-2022

FLUID MECHANICS AND HYDRAULIC MACHINERY

(Civil Engineering)

Time: 3 Hours

Max. Marks: 70

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Note: 1. Question paper consists of two parts (Part-A and Part-B)

2. Answer ALL the question in Part-A

3. Answer any THREE Questions from Part-B

PART – A (14 Marks)

1. a) Define specific gravity and kinematic viscosity. (2M)

   b) Differentiate between simple manometer and differential manometer. (2M)

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   c) Define velocity potential function and stream function. (2M)

   d) What is meant by pitot tube? (2M)

   e) Define hydraulic coefficients. (2M)

   f) Classify hydraulic turbines. (2M)

   g) Define specific speed of a pump. (2M)

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PART – B (56 Marks)

1. (a) A plate of 0.025 mm distant from a fixed plate, moves at 60 cm/sec and requires a force of 2 N per unit area to maintain this speed. Determine the fluid viscosity between the plates. (6M)

   (b) Explain the working principle of U-tube manometer with a neat sketch. (8M)

   (OR)

   (a) Define surface tension and capillarity. Derive the expression for capillary rise. (7M)

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   (b) Explain about types of fluid with the help of stress strain diagram. (7M)

2. (a) Define the equation of continuity. Obtain an expression for continuity equation for three dimensional flow. (7M)

   (b) The stream function for a two dimensional flow is given by ? = 2xy, calculate the velocity at the point P(2,3). Find also the velocity potential function. (7M)

   (OR)

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   (a) State Bernoulli’s theorem. Derive Bernoulli’s equation from Euler’s equation. (7M)

   (b) Explain the classification of flows. (7M)

3. (a) Explain the boundary layer separation with neat sketch. What are the methods to control the boundary layer separation? (7M)

   (b) A crude oil of viscosity 0.97 poise and relative density 0.9 is flowing through a horizontal circular pipe of diameter 100mm and length 10m. Calculate the difference of pressure at the two ends of the pipe, if the rate of oil flow is 100 liters/sec. (7M)

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   (OR)

   (a) Derive Darcy Weisbach equation. (7M)

   (b) Derive the expression for loss of head due to sudden enlargement. (7M)

4. (a) Explain the working principle of pelton wheel turbine with neat sketch. (7M)

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   (b) A turbine is to operate under a head of 25 m at 200 r.p.m. The discharge is 9 m³/s. If the turbine efficiency is 90%, determine: (i) Specific speed of the turbine, (ii) Power generated (iii) Type of turbine. (7M)

   (OR)

   (a) Explain the working principle of Francis turbine with neat sketch. (7M)

   (b) Define cavitation. What are the effects of cavitation? Give the methods to prevent cavitation. (7M)

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5. (a) Explain the working principle of centrifugal pump with neat sketch. (7M)

   (b) A centrifugal pump is required to lift 0.04 m³/s of water from a well with a depth of 30 m. If rating of the pump motor is 25 kW, determine the overall efficiency of the pump. (7M)

   (OR)

   (a) Explain the working principle of reciprocating pump with neat sketch. (7M)

   (b) Define cavitation and priming related to pumps. (7M)

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