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1. The velocity at which the laminar flow stops, is known as
2. The hydraulic gradient line may be above or below the centre line of the pipe.
3. The ratio of the inertia force to the gravity force is called Froude number.
4. A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
5. The Francis formula for the discharge over Cippoletti weir is
6. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle θ which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
7. A manometer can be used to measure vacuum pressures.
8. The loss of pressure head in case of laminar flow is proportional to
9. The viscosity of a liquid is due to cohesion of its particles.
10. When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
11. The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.
12. The flow of water through the hole in the bottom of a wash basin is an example of
13. A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if
14. The Newton's law of resistance is based on the assumption that the
15. If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium.
16. In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
17. The shear stress-strain graph for a newtonian fluid is a
18. The length of the divergent cone in a venturimeter is __________ that of the convergent cone.
19. The Euler's equation for the motion of liquids is based upon the assumption that
20. The viscosity of mercury is __________ than that of water.
Fluid Mechanics MCQ 13
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