Q. The viscous force the relative motion between the adjacent layers of a fluid in motion.

Which one of the flowing fits best in the sentence?

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Q. The viscosity of a fluid in motion is 1 Poise. What will be it’s viscosity (in Poise) when the fluid is at rest?

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Q. Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature?

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Q. Which one of the following is not a unit of dynamic viscosity?

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Q. Which of the following is a unit of dynamic viscosity?

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Q. Which one of the following is the CGS unit of dynamic viscosity?

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Q. The dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get the answer in N-s/m²?

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Q. Which of the following is a unit of kinematic viscosity?

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Q. Which of the following is the dimension of kinematic viscosity?

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Q. The kinematic viscosity of a fluid is 0.1 Stokes. What will be the value is m²/s?

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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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