Download ABVMU MBBS 2nd Year Microbiology Paper II 2022 November Question Paper

4. Part B consists of 5 Units. Answer any one full question from each unit.

Each question carries 10 marks

PART - A

Marks: 20

1. a) Define Dynamic viscosity and Kinematic viscosity. [2M]

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2. b) Explain Absolute and Gauge Pressure. [2M]

3. c) Define Stream line and Path line. [2M]

4. d) Write down the Euler's equation of motion. [2M]

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5. e) Define Hydraulic gradient line and Total energy line. [2M]

6. f) What are the minor losses in pipes? [2M]

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7. g) Explain the terms: Lift and Drag. [2M]

8. h) Define Boundary Layer Thickness. [2M]

9. i) Define Mach number. [2M]

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10. j) Define Compressibility and Bulk modulus. [2M]

PART - B

Marks: 50

UNIT - I

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1. 2. 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. [5M]

   b) Derive the expressions for total pressure and centre of pressure for a vertically immersed plane surface. [5M]

   OR

2. 3. a) State and prove the Pascal's law. [5M]

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   b) A circular plate 3.0 m diameter is immersed in water in such a way that the greatest and least depths of the plate below the free surface are 4 m and 1.5 m respectively. Determine the total pressure and position of centre of pressure. [5M]

UNIT - II

1. 4. a) Distinguish between: [5M]

   1. Steady flow and unsteady flow

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   2. Uniform and non-uniform flow
   3. Laminar and turbulent flow
   4. Rotational and irrotational flow
   5. Compressible and incompressible flow.

   b) The stream function for a two-dimensional flow is given by ψ = 2xy, calculate the velocity at the point P (2, 3). Determine the velocity potential function. [5M]

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   OR

2. 5. a) Derive the Euler's equation of motion along a stream line and hence derive Bernoulli's equation. [5M]

   b) Water is flowing through a pipe having diameters 20 cm and 10 cm at sections 1 and 2 respectively. The rate of flow through the pipe is 35 lit/sec. The section 1 is 6 m above datum and section 2 is 4 m above datum. If the pressure at section 1 is 39.24 N/cm², find the intensity of pressure at section 2. [5M]

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UNIT - III

1. 6. a) Derive Darcy-Weisbach equation. [5M]

   b) A horizontal pipe line 40 m long is connected to a water tank at one end and discharges freely into the atmosphere at the other end. For the first 25 m of its length from the tank, the pipe is 150 mm diameter and then the diameter is suddenly enlarged to 300 mm. The height of water level in the tank is 8 m above the centre of the pipe. Considering all losses of energy, determine the rate of flow. Take f = 0.01 for both sections of the pipe. [5M]

   OR

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2. 7. a) Explain the concept of equivalent pipe. Derive an expression for the diameter of equivalent pipe. [5M]

   b) Three pipes of lengths 800 m, 500 m and 400 m and of diameters 500 mm, 400 mm and 300 mm respectively are connected in series. These pipes are to be replaced by a single pipe of length 1700 m. Find the diameter of the single pipe. [5M]

UNIT - IV

1. 8. a) Define the terms: Boundary layer thickness, Displacement thickness, Momentum thickness and Energy thickness. [5M]

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   b) Determine the thickness of the boundary layer at the end of the plate 2 m long and 0.3 m wide when placed in water flowing with a velocity of 1 m/s. Calculate the drag force on one side of the plate if the viscosity of water is 0.01 poise. [5M]

   OR

2. 9. a) What are the different methods of preventing separation of boundary layers? [5M]

   b) A flat plate 1.5 m × 1.5 m is towed in water at 20°C at a velocity of 8 m/s. Determine the drag force and the power required to maintain this speed, if the plate is kept parallel to the flow direction. Assume C_D = 0.003. [5M]

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UNIT - V

1. 10. a) Define Mach number. What is the significance of Mach number in compressible fluid flow? [5M]

   b) A gas is flowing through a horizontal pipe at a temperature of 4°C. The diameter of the pipe is 12 cm and the length is 36 m. A mercury manometer is fitted at the two ends of the pipe to measure the pressure drop. The reading of the manometer is 2.5 cm. The specific weight of the gas is 1.8 N/m³. Take γ = 1.4 and R = 287 J/kg K. Find the velocity of flow and the Mach number. [5M]

   OR

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2. 11. a) Derive an expression for velocity of sound wave in a fluid. [5M]

   b) A projectile is fired in air at an angle of 30° to the horizontal with a velocity of 300 m/s. If the temperature of air is 20°C, find the Mach number and Mach angle. [5M]

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