Water flows upward through a vertical pipe of diameter 5 cm and height 10 m. For a constant discharge, the pressure head at the lower end of

3 Water flows in a horizontal tube 150 m long and 16 cm in diameter at a speed of 0.1 m/s. Note that the density of water is 1000 kg/m" and its viscosity is 0.01 N.s/ m. Find the pressure difference along the length of the pipe? The tube contains a gate valve and two 90° reverse?

A valve is suddenly closed in a 200 mmø pipe. The increase in pressure is 700 kPa. Assuming that the pipe is rigid and the bulk modulus of water is 2.07 x 109 N/m2 If the length of the pipe is 650 m. long, compute the water hammer pressure in kPa at the valve if it is closed in 3 sec.

The diameter of a pipe gradually reduces from 1 m to 0.7 m. the pressure intensity at the centre line of 1 m section is 7.848 kN/m? and rate of flow of water though the pipe is 600 liters/s. The intensity of pressure (N/cm2) at the centre-line of 0.7 m section is (Correct up to 2 decimals)

1. Differentiate between Rotational flow and Compressible flow 2. A U-tube differential manometer is connected to two pipes A and B as shown in Figure A. Pipe A contains a liquid of specific gravity 1.5 while pipe B contains a liquid of specific gravity 0.9. The pressures at A and B are 98.1 kN/m² and 176.58 kN/m². Determine the difference in mercury level in the differential manometer. 3m 2m X-- Figure A 3. A plane surface of area A is totally immersed in a liquid of specific weight w (Figure B). Its surface is inclined at an angle q to the horizontal and its centroid is at a vertical depth x below the free surface. Show that the resultant force R acts at a distance h given by; in²q_ Sin h = lg Ах where Ig = 2nd moment of area of the immersed surface about an axis through its parallel to the water surface. centroid xsine to Figure B

4.) A 75 mm diameter pipe, 2 m long is just filled with oil (sp. gr. = 0.822) and then capped, and place on horizontal position. It is rotated at 27.5 rad/sec about a vertical axis 0.5 m from one end (outside the pipe). What is the pressure in kPa at the far end of the pipe? Answer: 1865 Kpa Subject: Fluid Mechanic Lesson: Relative Equilibrium of Liquids Fundamentals of Fluid Flow

The pressure gauges are inserted at A and B in a vertical pipe converging water.  The diameters at A and B are 150mm and 75mm respectively. The point B is 2.3m below point A.  When rate of flow down the pipe is 0.021m³/s.  The pressure at B is 117.72 KN/m² greater than at A.  The losses in pipe between A and B are expressed as(KVa²/2g)  where Va is velocity of A. Find the value of K.  If the pressure gauges at A and B are replaced by tubes filled with water and connectef to a u-tube containing Hg(SHg=13.6) calculate the value of the reading manometer.

A pipe discharges 130 lps of water into a reservoir at a point 1.85 m belowthe water surface. At point A the diameter is 25.4 cm and the center of the pipe is 1.25m above the water surface. At the discharge end the pipe is 30.5 cm. If the head lossfrom A to the reservoir is 0.7 m, determine the pressure in A.

2. The suction pipe of a pump rises at a slope of 3 vertical in 4 along the pipe which is 12 cm in diameter. The pipe is 7.2 m long; its lower end being just below the water surface in the reservoir. For design reasons, it is desirable that pressure at inlet to the pump Pump 4/3 shall fall to more than 75 kPa below atmospheric pressure. Neglecting friction, determine the maximum discharge that the pump may deliver. Take atmospheric Suction pipe pressure as 101.32 kPa. F.W.S. Reservoir/sump 2. 7.2 m

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