Online Quiz on Hydraulics and Fluid Mechanics - Set 01 - ObjectiveBooks

# Quiz Questions

01. When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.

02. The ratio of the inertia force to the gravity force is called Froude number.

03. If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.

04. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.

05. The flow in a pipe is laminar, when Reynold number is less than 2000.

06. According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions.

07. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.

08. The vacuum pressure can be measured with the help of a Piezometer tube.

09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.

10. If the value of coefficient of discharge increases, the discharge through the orifice decreases.

11. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.

12. The flow at critical depth in an open channel is called torrential flow.

13. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

14. The velocity of liquid flowing through an orifice varies with the available head of the liquid.

15. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free.

16. Surface tension force is the product of surface tension per unit length and cross-sectional area of flow.

17. When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.

18. The property of a liquid which enables it to resist tensile stress is called its surface tension.

19. In the manufacturing of lead shots, the property of surface tension is utilised.

20. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.

Blogger Comment