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- 1The SI unit of kinematic viscosity (u) is: (a) m^2/s (b) kg/m-s (c) m/s^2 (d) m^3/s^2(a) m^2/s
- 2—
- 3For a Newtonian fluid (a) Shear stress is proportional to shear strain (b) Rate of shear stress is proportional to shear strain (c) Shear stress is proportional to rate of shear strain (d) Rate of shear stress is proportional to rate of shear strain(c) Shear stress is proportional to rate of shear strain
- 4The dimension of surface tension is: [GATE-1996] (a) ML^-1 (b) L^2T^-1 (c) ML^-1T^1 (d) MT^-2(d) MT^-2
- 5Assertion (A): In a fluid, the rate of deformation is far more important than the total deformation itself. Reason (R): A fluid continues to deform so long as the external forces are applied. (a) Both A and R are individually true and R is the correct explanation of A. (b) Both A and R are individually true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true.Ans. (a) This question is copied from
Characteristics of fluid
1. It has no definite shape of its own, but conforms to the shape of the containing vessel.
2. Even a small amount of shear force exerted on a fluid will cause it to undergo a deformation which continues as long as the force continues to be applied.
3. It is interesting to note that a solid suffers strain when subjected to shear forces whereas a fluid suffers Rate of
Strain i.e. it flows under similar circumstances. - 6Newton’s law of viscosity depends upon the (a) Stress and strain in a fluid (b) Shear stress, pressure and velocity (c) Shear stress and rate of strain (d) Viscosity and shear stress
- 7What is the unit of dynamic viscosity of a fluid termed 'poise' equivalent to?Ans. (c)
- 8The shear stress developed in lubricating oil, of viscosity 9.81 poise, filled between two parallel plates 1 cm apart and moving with relative velocity of 2 m/s is:
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- Fichas sobre Sin título, creado por Sakthi P el 13/10/2018.
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