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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Q. A beaker of height h is filled with a liquid of density ρ up to a certain limit. The beaker is rotated by an angle θ such that further increase in the angle will result in over flow of the liquid. If the liquid surface is exposed to the atmosphere, what will be the gauge pressure at point B?

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Q. An arm of a teapot is completely filled with tea (density=ρ). If the arm has a length of l and is inclined at 30° to the horizontal, what will be the pressure difference between the two points, C at the mouth and D at the base of the arm?

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Q. A beaker is filled with a liquid of density ρ₁ up to a certain height. The pressure at the base of the beaker id Pb. If the liquid is replaced by an equal volume of another liquid of density ρ₂, what will be the pressure at the base of the beaker now?

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Q. A beaker is filled with a liquid of density ρ1 up to a certain height. A is a point, h m downwards from the free surface of the liquid as shown. The liquid is replaced by equal volume of another liquid of density ρ2. If ρ1 > ρ2, how will the pressure at point A change?

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