Hydraulics and Fluid Mechanics Quiz - Set 02 - ObjectiveBooks

Quiz Questions

01. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.

02. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other is called turbulent flow.

03. If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.

04. 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.

05. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.

06. A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity.

07. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.

08. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.

09. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.

10. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

11. 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.

12. The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.

13. The centre of buoyancy is the centre of area of the immersed body.

14. When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe

15. The hydraulic gradient line may be above or below the centre line of the pipe.

16. When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.

17. In a Venturimeter, the velocity of liquid at throat is __________ than at inlet.

18. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.

19. The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid

20. The hydraulic gradient line is always parallel to the centre line of the pipe.

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