Q. A Differential manometer is connected at the points A and Bat the centre of two pipes. The pipe A(left limb) contains a liquid of specific gravity = 1.5 while pipe B (right limb)contains a liquid of specific gravity 0.85. The pressure at A and B are 0.5 kgf/cm² and 1.2 kgf/cm² respectively. Find the difference in level of mercuru in the differential manometer. A is 2.5m above B and 5 m above the mercury in its own limb. B is 2.5 m above the mercury level in limb A.

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Q. An inverted differential manometer is connected to two pipes A and B which covey water. The fluid in manometer is oil of specific gravity 0.75. For the manometer readings, find the pressure difference between A and B. Datum in left limb is 40 cm above point A. Point B is 60 cm below datum line. Difference in level of fluid is 20 cm.

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Q. In the inverted U-tube Differential manometer, how is the specific gravity of manometric fluid used relative to the fluid flowing in the pipes

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Q. Why is large reservoir used in single column manometer?

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Q. Manometers are the pressure measuring devices which use the principle of dynamic pressure to measure the pressure difference.

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Q. The distance moved by liquid will be more in which type of manometer?

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Q. Differential manometer gives the pressure reading with respect to atmospheric pressure.

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Q. Which device is popularly used for measuring difference of low pressure?

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Q. If the atmospheric pressure at sea level is 7.5 N/cm², determine the pressure at a height of 3000m assuming the pressure variation follows isothermal law. The density of air is given as 1.2 km/m³.

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Q. The barometric pressure at sea level is 760 mm of Mercury while that on a mountain top is 715 mm. If the density of air is assumed constant at 1.2 kg/m³ , what is the elevation of the mountain top?

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Q. Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm² and temperature is 25℃ assuming air is incompressible. Take density of air as 1.2 kg/m³. Neglect variation of g.

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Q. Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm² and 25℃ respectively. The temperature lapse rate is given as 0.0065 ℃ /m. Take density of air at sea level equal to 1.2 kg/m³.

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Q. Pressure variation for compressible fluid is maximum for which kind of process?

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Q. Why can’t the density be assumed as constant for compressible fluids?

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Q. What is the variation observed in temperature in atmosphere with respect to elevation?

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Q. As we go upwards, at height there is slight decrease in pressure variation.

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Q. For dynamic fluid motion in a pipe, the pressure measurement cannot be carried out accurately by manometer.

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Q. A simple U tube manometer connected to a pipe in which liquid is flowing with uniform speed will give which kind of pressure?

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Q. A beaker half-filled with water is exposed to the atmosphere. If the pressure at points A, B and C as shown are Pa, Pb and Pc respectively, which one of the following will be the relation connecting the three?

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Q. A beaker is filled with a liquid up to a height h. If A and B are two points, one on the free surface and one at the base as shown, such that the minimum distance between the two is l, what will be the pressure at point B?

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