Fluid Mechanics 101
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Fluid Mechanics 101
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25 Questions

1. A stone weighs 450 N in air and 200 N in water. Compute the volume of stone.
2. Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent?
3. What will be the shape of the pathline for an one-dimensional flow be like?
4. Which of the following is not an example of free vortex flow?
5. A water flows through a pipe at a velocity 2 m/s. The pressure gauge reading is 2 bar. The datum head is given to be 2 m. Find the piezometric head. (Assume all Bernoulli’s assumptions, Density of water = 1000 kg/m3, g = 9.8 m/s2).
6. The value of the Bulk Modulus of an ideal fluid is
7. Which of the following is NOT a type of force considered in the Navier-Stokes equation?
8. What type of force does a stress produce?
9. Pressure intensity or force due to pressure gradient for fluid at rest is considered as which kind of force?
10. The value of the compressibility of an ideal fluid is
11. If a mass of 1000kg of liquid occupies a volume of one cubic meter, then 1 represents which among the following?
12. Which equation must be perfunctorily satisfied while dealing with fluid flow problems?
13. In unsteady flow, the flow parameters change with respect to position.
14. Which of the following is not an example of forced vortex flow?
15. The value of the viscosity of an ideal fluid is
16. The Reynolds number is found out for a flow in a circular pipe. This circular pipe is moulded into a square pipe, keeping length of the pipe same. Ignore the thickness of the pipe. The Reynolds number changes by __________
17. What is the resultant upward pressure of a fluid on an immersed body called?
18. The value of the surface tension of an ideal fluid is
19. When external torque is absent the type of vortex flow is
20. If fluid is at rest in a container of a narrow mouth at a certain column height and same fluid is at rest at same column height in a container having broad mouth, will the pressure be different at certain depth from fluid surface.
21. What is the magnitude of vorticity?
22. If there is change in angle contained by two sides. the average of the angle is
23. The Bernoulli’s equation in fluid dynamics is valid for _________
24. Which of the following is correct?
25. Calculate the hydrostatic pressure for water moving with constant velocity at a depth of 5 m from the surface.

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