Hydraulics and Fluid Mechanics - Data Intensity 4 Multiple Questions and Answers.




6.What is the characteristic variation shown by the thixotropic fluids in their shear stress vs. rate of shear strain graph?
A. shear stress increases with increase in rate of shear strain
B. shear stress decreases with increase in rate of shear strain
C. shear stress shows variation only after a definite shear stress is reached
D. shear stress has decreasing constant and then variation relationship with rate of shear strain

7.What happens to viscosity in the case of incompressible fluids as temperature is increased?
A. It remains constant
B. It increases
C. It decreases
D. None of the mentioned

8.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.
A. It increases
B. It decreases
C. It remains constant
D. None of the above

9.In liquids in order to measure the viscosity of fluid experimentally we consider the variation of shear stress with respect to what property?
A. strain
B. shear strain
C. rate of shear strain
D. none of the mentioned

10.Which of the following is the condition for the boiling of a liquid?
A. Absolute pressure of a liquid must be greater than or equal to it�s vapor pressure
B. Absolute pressure of a liquid must be less than or equal to it�s vapor pressure
C. Absolute pressure of a liquid must be equal to it�s vapor pressure
D. Absolute pressure of a liquid must be greater than it�s vapor pressure

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