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Fluid Mechanics MCQ 5

1. According to Bernoulli's equation
2. In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
3. The velocity at which the turbulent flow starts is known as higher critical velocity.
4. The viscosity of water at 20°C is
5. The ratio of the inertia force to the elastic force is called
6. The specific weight is also known as weight density.
7. The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.
8. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
9. Bernoulli's equation is applied to
10. In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
11. The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)
12. A fluid having no viscosity is known as
13. According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
14. In the manufacturing of lead shots, the property of surface tension is utilised.
15. The force per unit length is the unit of
16. The discharge through a channel of rectangular section will be maximum, if
17. The shear stress-strain graph for a non-newtonian fluid is a curve.
18. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
19. The intensity of pressure at any point, in a liquid at rest, is __________ to the depth of liquid from the surface.
20. The mercury does not wet the glass. This is due to the property of the liquid known as
Fluid Mechanics MCQ 5
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