DIFFERENTIAL MANOMETER - FaRudZi4477

DIFFERENTIAL MANOMETER - FaRudZi4477

DIFFERENTIAL MANOMETER - It is a device used for measuring the difference of pressures, between two points in a pipe, or in two different pipes. Example 2.6 A U tube manometer measures the pressure difference between two points A and B in a

liquid. The U tube contains mercury. Calculate the difference in pressure if h =1.5 m, h2 = 0.75 m and h1 = 0.5 m. The liquid at A and B is water ( = 9.81 103N/m2) and the specific gravity of mercury is 13.6. Solution to Example 2.6 Since C and D are at the same level in the same liquid at rest

Pressure at C = Pressure at D For the left hand limb pC right pD For the hand limb p A h p B h2 h1 sh1 since Pressure difference

Activity 2C A U tube manometer measures the pressure difference between two points A and B in a liquid. The U tube contains mercury. Calculate the difference in pressure if h = 2.0 m, h2 =

0.35 m and h1 = 0.5 m. The liquid at A and B is oil ( s = 0.85) and the specific gravity of mercury is 13.6. INVERTED DIFFERENTIAL MANOMATER - It is used for measuring the difference of low pressure, where accuracy is the prime consideration Activity 2D An inverted U tube as shown in the figure

below is used to measure the pressure difference between two points A and B which has water flowing. The difference in level h = 0.3 m, a = 0.25 m and b = 0.15 m. Calculate the pressure difference pB pA if the top of the manometer is filled with: (a) air (b) oil of relative density 0.8. water Activity 2E

In the figure 2, fluid Q is water and fluid P is oil (specific gravity = 0.9). If h = 69 cm and z = 23 cm, what is the difference pressure in kN/m2 between A and B? Figure 2

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