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### Civil Engineering :: Hydraulics

1. A pitot tube is used to measure

2.  A. pressure B. difference in pressure C. velocity of flow D. none of these.

3. The thickness of a sharp crested weir is kept less than

4.  A. one-third of the height of water on the sill B. one-half of the height of water on the sill C. one-fourth of the height of water on the sill D. two-third of the height of water on the sill E. none of these.

5.  The property of steam function Ïˆ is :
6.  A. ψ is constant everwhere on any stream line B. the flow around any path in the fluid is zero for continuous flow C. the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction D. the velocity vector may be found by differentiating the stream function E. all the above.

7. The maximum vacuum created at the summit of a syphon is

8. A.

2.7 m of water

B.

7.4 m of water

C.
 5.5 m of water
D.

none.

9. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is

10.  A. 1 metre of water B. 2 metres of water C. 3 metres of water D. 3.5 metres of water E. 4.0 metres of water.

11. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if

12.  A. area is horizontal B. area is vertical C. area is inclined D. all the above.

13.  If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its
14.  A. specific weight B. specific mass C. specific gravity D. none of these.

15.  Bernoulli's equation assumes that
16.  A. fluid is non-viscous B. fluid is homogeneous C. flow is steady D. flow is along the stream line E. all the above.

17. The time required to close a valve gradually is (where L is the length of pipe and C = velocity of pressure wave)

18.  A. $$\frac { 2L } { C }$$ B. lessthan  $$\frac { 2L } { C }$$ C. greater than $$\frac { 2L } { C }$$ D. lessthan $$\frac { 4L } { C }$$

19. A syphon is used

20.  A. to connect water reservoirs at different levels intervened by a hill B. to supply water to a town from higher level to lower level C. to fill up a tank with water at higher level from a lower level D. none of these.