Q. An instrument with air as fluid was involved in some experiment( specific volume was the characteristic property utilized) which was conducted during day in desert. Due to some reason experiment couldn’t be conducted during day and had to be conducted during night. However there were considerable errors in obtained values. What might be the reason of these errors?

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Q. A stone weighed 177 N on earth. It was dropped in to oil of specific gravity 0.8 on a planet whose acceleration due to gravity is 5m/s². It displaced oil having weight of 100N. What was the volume of oil displaced by the stone?

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Q. An compressible fluid’s specific gravity was measured on earth, on a planet having acceleration due to gravity 5.5 times that of earth, and in space at STP. Where will it be having highest value?

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Q. Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity V. What will be the velocity of the fluid in contact with the upper plate?

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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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