Q. The shear stress at a point in a liquid is found to be 0.03 N/m². The velocity gradient at the point is 0.15 s⁻¹. What will be it’s viscosity (in Poise)?

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Q. Two horizontal plates placed 250mm have an oil of viscosity 20 poises. Calculate the shear stress in oil if upper plate is moved with velocity of 1250mm/s.

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Q. The kinematic viscosity of oil of specific gravity .8 is .0005 .This oil is used for lubrication of shaft of diameter .4 m and rotates at 190 rpm. Calculate the power lost in the bearing for a sleeve length of 90mm. The thickness of the oil film is 1.5mm.

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Q. Find the kinematic viscosity of oil having density 1962 g/m³. The force experienced for area of 20 m² is 4.904 kN and velocity of gradient at that point is 0.2/s.

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Q. The velocity distribution for fluid flow over a flat plate is given by u=2y-6y² in which u is the velocity in metre per second at a distance of y metre above the plate. Determine the shear stress at y=0.15m.Take dynamic viscosity of fluid as 8.6 poise.

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Q. In which types of fluids it is observed that momentum transfer dominates cohesive forces with increase in temperature and hence viscosity increases.

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Q. What is the characteristic variation shown by the thixotropic fluids in their shear stress vs. rate of shear strain graph?

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Q. What happens to viscosity in the case of incompressible fluids as temperature is increased?

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Q. If a fluid, which has a constant specific gravity, is taken to a planet where acceleration due to gravity is 3 times compared to its value on earth, what will happen to its kinematic viscosity.

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Q. In liquids in order to measure the viscosity of fluid experimentally we consider the variation of shear stress with respect to what property?

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Q. For a compressible fluid the kinematic viscosity is affected by temperature and pressure variation.

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Q. Which of the following statement is true about vapor pressure of a liquid?

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Q. Which of the following equation correctly depicts the relation between the vapor pressure of a liquid and it’s temperature?

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Q. Which of the following is the condition for the boiling of a liquid?

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Q. Which of the following machines have the possibility of cavitation?

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Q. The three liquids 1, 2, and 3 with vapor pressures V1, V2 and V3 respectively, are kept under same pressure. If V1 > V2 > V3, which liquid will start boiling early?

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Q. Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?

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Q. The absolute pressure of a water is 0.5kN above it’s vapor pressure. If it flows with a velocity of 1m/s, what will be the value of Cavitation Number describing the flow induced boiling?

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Q. Which of the following is correct regarding the formation and collapse of vapor bubbles in a liquid?

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Q. Which one of the following is the correct relation between compressibility β and Bulk Modulus k?

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