Q. If for same temperature and pressure change, the value of bulk modulus is compared for isothermal process and adiabatic process, which one would be higher?

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Q. The value of gas constant is same for all the gases.

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Q. Calculate the pressure exerted by 9 kg of air at a temperature of 20℃ if the volume is 0.8m³. Assuming ideal gas laws are applicable.

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Q. A gas weighs 16 N/m³ at 30℃ and at an absolute pressure of 0.35 N/mm². Determine the gas constant.

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Q. A cylinder of 0.8 m³ in volume contains superheated steam at 70℃ and 0.4 N/m² absolute pressure. The superheated steam is compressed to 0.3 . Find pressure and temperature.

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Q. Determine the compressibility of an incompressible fluid, if the pressure of the fluid is changed from 70 N/m² to 130 N/m². The volume of the liquid changes by 0.15 percent.

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Q. What is the variation of cp, cv and k in case of gases when the temperature increases?

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Q. Calculate the magnitude of capillary effect in millimeters in a glass tube of 7mm diameter, when immersed in mercury. The temperature of the liquid is 25℃ and the values of surface tension of mercury at 25℃ is 0.51 N/m. The angle of contact for mercury is 130°.

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Q. Determine the minimum size of glass tube that can be used to measure water level if the capillary rise in the tube is restricted to 5mm. Consider surface tension of water in contact with air as 0.073 N/m.

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Q. An oil of vicosity 7 poise is used for lubrication between shaft and sleeve. The diameter of shaft is 0.6 m and it rotates is 360 rpm. Calculate the power lost in oil for a sleeve length of 160mm. The thickness of oil film is 1.0mm.

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Q. Find the capillarity rise or fall if a capillary tube of diameter .03m is immersed in hypothetical fluid with specific gravity 6.5, surface tension 0.25 N/m and angle of contact 147°.

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Q. Will capillary rise occur and if it occurs what will be capillary rise if glass capillarity tube is immersed in water and experiment is carried out by astronauts in space.

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Q. The surface tension of fluid in contact with air at 25℃ is 0.51N/m. The pressure inside a droplet is to be 0.05 N/cm² greater than outside pressure. Determine the diameter of the droplet of water.

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Q. If a fluid of certain surface tension and diameter is used to create a soap bubble and a liquid jet. Which of the two, bubble or liquid jet, will have greater pressure difference on the inside and outside.

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Q. Capillarity fall is reduced if we take the appartus (capillary tube immersed in fluid having acute angle of contact) considerable distance inside the earth( i.e below the earth crust).

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Q. For liquid fluids will capillarity rise (or fall) increase or decrease with rise in temperature.

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Q. Cavitation is more pronounced in rough pipes than smooth surfaced pipes.

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Q. The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1 Poise. The upper plate is dragged to the right with a force of 5N keeping the lower plate stationary.
What will be the velocity in m/s of flow at a point 0.5 cm below the lower surface of the upper plate if linear velocity profile is assumed for the flow?

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Q. The graph shows relation between shear stress Z and velocity gradient du/dy of a fluid is given by Z = A * (du/dy)ⁿ where A and n are constants. The graphs are drawn for three values of n. Which one will be the correct relationship between n₁, n₂ and n₃?

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Q. A soap film is trapped between a frame and a wire of length 10 cm as shown. If the surface tension is given as 0.0049 N/m, what will be the value of m (in mg) such that the wire remains in equilibrium?

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