U-tube manometer Problems and solution Lecture-01 (Bangla)

U-tube manometer Problems and solution Lecture-01 (Bangla) 1. The right limb of a simple U-tube manometer containing mercury is open to the atmosphere while the left limb is connected to a pipe in which a fluid of sp. gr. 0.9 is flowing. The centre of the pipe is 12 cm below the level of mercury in the right limb. Find the pressure of fluid in the pipe if the difference of mercury level in the two limbs is 20 cm. 2. A simple U-tube manometer containing mercury is connected to a pipe in which a fluid of sp. gr. 0.8 and having vacuum pressure is flowing. The other end of the manometer is open to atmosphere. Find the vacuum pressure in pipe, if the difference of mercury level in the two limbs is 40 cm and the height of fluid in the left from the centre of pipe is 15 cm below. 3. A pipe contains an oil of sp .gr.0.9.A differential manometer connected at the two pointy A and B shows a difference in mercury level as 15 cm. Find the difference of pressure of pressure at the two points. 4. A differential manometer is connected at the two points A and B of two pipes as shown in fig. The pipe A contains a liquid of sp. Gr.=1.5 while pipe B contains a liquid of sp. gr.=0.9. The pressures at A and B are 1 kgf/cm^(2 ) and 1.80 kgf/cm^2 respectively. Find the difference in mercury level in the differential manometer. 5.A differential manometer is connected at the two points A and B as shown in Fig. at B air pressure is 9.81 N/cm^2 (abs),find at the absolute pressure A. 6. Water is flowing through two different pipes to which an inverted differential manometer having an oil of sp. gr. 0.8 is connected. The pressure head in the pipe A is 2 m of water; find the pressure pipe the B for manometer reading as shown in Fig. 7. In the Fig. pressures at A and B are the same, 100 kPa. If water is introduced at A to increase P_A to 130 kPa, find and sketch the new positions of the mercury menisci. The connecting tube is a uniform 1-cm diameter. Assume no change in the liquid densities.