Hydraulics Online Test – Paper 3

1. *The orifice used for low discharge is

2. *The atmospheric pressure varies with

3. *The rate of flow through a venturimeter varies as

4. *Cavitations is caused by

5. *Hydraulic gradient is equal to

6. *Cipolletti weir is a trapezoidal weir having a side slope of

7. *The hydraulic radius is equal to

8. *The difference between the total energy line and the hydraulic gradient line is

9. If H is the height of the liquid above the sill, the effect of end contraction on each side, according to Francis' formula, is

10. *Total energy line (T.E.L) represents the sum of

11. The Manning's formula for flow in an open channel is given by

12. *An orifice is called a large orifice if the water head is

13. Find the capillary rise/fall in a glass tube when immersed in mercury with the following given data: surface tension, σ = 0.52 gmf/cm, angle of contact, θ = 130°, S.G. of mercury = 13.6, diameter of the pipe = 2.5 mm.

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

15. Velocity of flow may be determined using:

16. A triangular notch is preferred to a rectangular notch because

17. When the pipes are connected in parallel, the total loss of head

18. *The most economical section of a circular channel for the maximum velocity is when

19. *The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream, causing a distinct rise of the liquid surface, is

20. *The magnitude of water hammer depends upon

21. In an open tube, the free surface of mercury remains

22. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

23. The total energy of a liquid in motion is equal to:

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

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

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

27. Hydraulic gradient line and total energy line are

28. *Bernoulli's theorem deals with the law of conservation of

29. *The term v^2/2g is known as

30. The term P/pg is known as

31. Which of the following has the highest coefficient of discharge:

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

33. *Bernoulli's equation assumes that

34. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

35. When the pipes are connected in series, the total rate of flow

36. Practical fluids possess

37. ........ is defined as the maximum increase in water level in the path of the flow of water

38. 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

39. 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

40. For uniform flow in the channel

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

42. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

43. When the fluid is at rest, the shear stress is

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

45. *Pressure within a soap bubble is

46. In a venturimeter, the divergent cone is kept

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

48. Mach number is the ratio of inertia force to

49. *The imaginary line joining each head of water is called

50. One horsepower is equal to