A differential manometer connected to pipes A and B carrying liquids of specific gravity 0.90 and 0.80 respectively. Point B is 0.80 m below A. If the mercury level in the left limb is 0.20 m below A and the difference in levels of mercury in the two limbs is 0.95 m, find the pressure difference between A and B.

12. A pipe contains an oil of sp. gr. 0.8. A differential manometer connected at the two points A and B of pipe shows a difference in mercury level as 20 cm. Find the difference of pressure at the two points (Ans. 25113.6 Nm] 13. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N/cm and pipe B contains oll of sp. gr. 0.8 under a pressure of 11.772 N/em. The pipe A lies 2.5 m above pipe B. Find the difference of [Ans. 31.36 cm of mercury] 14. A differential manometer is connected at the two points A and B as shown in Fig, 2.25. At B air pressure [Ans, 6.91 Nicm) pressure measured by mercury as fluid filling U-tube. is 7.848 N/cm (abs.), find the absolute pressure at A. AIR WATER OIL Sp. gr.0.8 OIL Sp. gr. 0.8 50'cm I. 30'am 100 am 50 cm MERCURY Sp. gr.13.6 WATER Fig. 2.25 Fig. 2.26

Two pipes namely A and B are connected by manometer (SHg = 13.6). The fluid in both pipes is an oil with r.d of 0,923, indicates a differential pressure reading h of 0.3 m. If the pressure in pipe A increases by 6 kPa, while the pressure in pipe B decreases by 2 kPa, determine the new differential pressure reading h of the manometer. Neglect the diameter of the pipes. mercury 0.1 m D 01 m Mercury

3) A pressure gage at the suction side of a pump shows a vacuum of 25 cm of mercury. Determine the (a) pressure in kPa; (b) pressure head in meter of water; (c) absolute pressure in kPa if the barometer reads 755cm of mercury.

1. A 3-mm diameter tube is inserted in mercury and in water. a. Assuming the tube is clean so that the angle of contact with mercury is 140 degrees and the surface tension is 0.5140 N/m, what is the amount of depression? b. What is the amount of rise of water inside the tube assuming an angle of contact of 0 degree and a surface tension of 0.0728 N/m? c. If the tube is replaced by two parallel, wide, clean glass plates separated by a distance of 2mm, how far does the water rise due to capillary action assuming surface tension amounting to 0.0730 N/m.

A 63 cm diameter pipe is fitted to a venturi meter with a throat diameter of 24 cm as shown. During a 14-minute test, it discharges 680 m3 of water. Pressure at the large section is equivalent to 35 m of water. At the throat a negative pressure corresponding to 23 cm of mercury is occurring. What is the meter coefficient.

13. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carb tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N/cm2 and pipe B contains oil of sp. gr. 0.8 under a pressure of 11.772 N/em. The pipe A lies 2.5 m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube. 14. A differential manometer is connected at the two points A and B as shown in Fig. 2.25. At B air pressu is 7.848 N/cm² (abs.), find the absolute pressure at A. [Ans. 31.36 cm of mercury] [Ans, 6.91 N/em) AIR B WATER OIL Sp. gr.0.8 OIL Sp. gr. 0.8 50'cm 30 cm om 100 cm 50 cm 10 cm MERCURY Sp. gr. 13.6 WATER Fig. 2.25 Fig. 2.26

ROVINCE c). If the viscosity is 0.0126 stokes, what is the equivalent kinematic viscosity in m2/s? 3. If the velocity of water is 8 m/s and the pressure is 140 kPa on the discharge side of a pump, a) what will be the head of the pump if the velocity is 4 m/s and the pressure is 90 kPa on the suction side of the pump? b) how much power is required to drive it if the diameter of the suction side is 600 mm? c) If the pump is rated at 120 hp, what is the efficiency of the pump neglecting energy losses in the system? STATE 1969

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

An illegal connection was detected along a water 400 mm water supply line made with cast iron pipe (n = 0.012). Before the said illegal connection, the difference in pressure for every 100 meters is 1 meter and after it the difference in pressure per 100 meters is only 0.7 m. Compute the decrease in supply due to this connection.