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Fluid Mechanics MCQ 3

1. When the flow in an open channel of cross section is gradually varied, the flow is said to be
2. The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is
3. The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.
4. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free.
5. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
6. When the Mach number is equal to unity, the flow is called
7. Poise is the unit of_____
8. If the depth of water in an open channel is less than the critical depth, the flow is called
9. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
10. The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel.
11. The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
12. A nozzle placed at the end of a water pipe line discharges water at a
13. In order to avoid tendency of separation at throat in a venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
14. The unit of surface tension is
15. A weir, generally, used as a spillway of a dam is
16. When the Mach number is more than 6, the flow is called
17. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
18. The ratio of the inertia force to the __________ is called Euler's number.
19. A thick liquid like a syrup has a __________ viscosity than a light liquid like water.
20. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
Fluid Mechanics MCQ 3
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