Hydraulics Online Test – Paper 3

1. The error 1% in measuring H will produce a

2. Head loss due to friction in a pipe is given by the Darcy-Weisbach equation

3. *1 m head is equivalent to

4. Discharge over an ogee weir remains the same as that of

5. The pressure less than atmospheric pressure is known as

6. *Hydraulic gradient is equal to

7. Reynolds number is the ratio of initial force and

8. *Barometers are used to measure

9. Hooke's law for solids is analogous to

10. *The specific weight of water 1000 kg/m^3

11. *Molecules of fluids get attracted due to

12. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

13. The two depths at which the specific energy is the same are called

14. Liquids or fluids

15. The depth of flow at which the specific energy is minimum is called

16. Specific energy of a flowing fluid per unit weight is equal to

17. The profile of rising water on the upstream side of the dam is called

18. If the density of a fluid is constant from point to point in a flow region, it is called

19. *If a pitot tube is placed with its nose facing sideways, the liquid

20. Water belongs to

21. The ratio of the mean velocity to the surface velocity in open channels is equal to

22. To avoid an interruption in the flow of a siphon, the air vessel is provided

23. With a clinging nappe of a weir, the excess discharge is

24. *The types of instrument used to measure low pressure with accuracy is

25. The minimum head loss will occur in

26. Water hammer is a phenomenon that occurs

27. *Back water curve is caused if there is a

28. If the velocity in a fluid flow changes with respect to the length of the direction of the flow, it is called

29. Cavitations in flowing fluid occurs when

30. *Variation in volume of liquid with variation in pressure is called

31. Mach number is the ratio of inertia force to

32. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

33. *Cipolleti weir is a

34. Gauge pressure is

35. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

36. Total head of a particle in motion is the sum of

37. *The flow in which the path of individual particles of liquid cross each other is called

38. For the laminar flow through a circular pipe, the maximum velocity is

39. A vessel having a depth of 30 cm is filled with water up to a depth of 10 cm from the top level. Find the pressure exerted at a depth of 5 cm and 15 cm from the top of the vessel respectively

40. The capillary rise or fall of the liquid is given by

41. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particle at each point is called

42. The basic head loss in a long pipe is:

43. Critical depth (he) is given by (where q= rate of flow per unit width of channel)

44. If S is the height of the crest above the base of the channel and H is the head of water over the weir, whose length is L and discharge is Q m^3/sec, the velocity of approach V_a is

45. A rise or fall of liquid in a glass tube of a very small diameter when dipped is

46. *If a pitot tube is placed with its nose facing downstream, the liquid

47. For the same specific force, the two depths at which the same discharge occurs are called

48. The discharge through a V-notch weir is directly proportional to:

49. *Venturimeter is used to measure

50. *Pressure head is given by