1. The value of Cd and Cv is 0.62 & 0.92, then find Cc.
Correct : C. 1.48
2. An opening provided in one side of a tank or a reservoir, with upstream liquid level below the
top edge of the opening is called
Correct : C. notch
3. a structure constructed across a river or canal to store water on the upstream side is called
Correct : D. weir
4. The top of a weir over which water flows is known as
Correct : B. crest
5. As compared to notch, the size of weir is large.
Correct : A. true
6. The equation of rectangular notch is deal with H is
Correct : B. 3/2
7. The equation of V-notch is deal with H is
Correct : C. 5/2
8. Water is flowing through a rectangular notch, having base width 500 mm and head over it is
160 mm. Find discharge of notch if Cd = 0.6.
Correct : A. 0.0567 m3/sec
9. Only one reading, i.e. head (H) is required to be taken for the measurement of discharge in a
triangular notch.
Correct : A. true
10. A rectangular notch gives more accurate results for low discharges than a triangular notch.
Correct : B. false
11. The same triangular notch can measure a wide range of flows accurately.
Correct : A. true
12. When the length of the weir is less than the width of the stream, there will be contraction of flow at each end. This contraction is known as
Correct : B. end contraction
13. The velocity with which water approaches the weir, is known as
Correct : C. velocity of approach
14. the velocity of approach is considered for the discharge over the weir then the additional
height of must be considered.
Correct : A. true
15. The cippoletti weir is a trapezoidal weir, having side slope 1 horizontal to 4 vertical.
Correct : A. true
16. Determine the head over sill of a 90° V-notch when the discharge passing over it is 100 lit/sec.
consider Cd 0.6.
Correct : C. 0.346 m
17. A 12 m long weir is subdivided by four intermediate vertical posts each 0.6 m wide. If the weir is discharging under a head of 0.5 m, calculate discharge using Francis formula.
Correct : A. 5.895 m3/sec
18. As the flow moves in the pipe, fluid pressure decreases.
Correct : A. true
19. The velocity of liquid particles at the centre of pipe is less than the velocity of particles near
the inner surface of pipe.
Correct : B. false
20. The frictional resistance is proportional to the velocity in laminar flow
Correct : A. true
21. The fR depends on the nature of the surface of contact in laminar flow.
Correct : B. false
22. Head loss due to entry.
Correct : A. h = 0.5 V12/2g
23. Head loss due to exist.
Correct : D. h = 0.5 V32/2g
24. Head loss due to sudden contraction.
Correct : B. h = 0.5 V22/2g
25. Head loss due to sudden enlargement.
Correct : C. h = (V2 – V3)2/2g
26. Head loss due to fitting in pipe.
Correct : D. h = Kf V2/2g
27. Head loss due to bend in pipe.
Correct : B. h = 0.5 V22/2g
28. In ___________ Reynolds carried out number of to decide the type of flow.
Correct : B. 1833
29. In Reynolds experiment, the dye thread will move so steadily that it will be hardly seen to be in motion. Such a flow is known as
Correct : A. Laminar flow
30. Such a velocity, at which the dye thread starts becoming irregular is known as
Correct : A. lower critical velocity.
31. Such a velocity at which the whole dye thread is diffused, is known as
Correct : B. upper critical velocity
32. In Reynolds experiment, beyond the upper critical velocity, the flow will be fully disturbed and such a flow is known as
Correct : C. Turbulent flow
33. If pressure heads (P/w) of a liquid Bowing in a pipe be plotted as vertical ordinates on the center line of the pipe, then the line joining the tops of such ordinates is known as
Correct : B. Hydraulic Gradient Line
34. If the sum of pressure heads and velocity heads [(p/w) + (v2 /2g)] of a liquid flowing In a pipe be plotted as vertical ordinates on the centre line of the pipe. then the line joining the tops of
such ordinates is known as
Correct : C. Total Energy Line
35. A nomogram is a graph in which lines representing different variables are arranged at certain distances is known as
Correct : C. Hazen-William Nomogram
36. The Hagen William formula is used to design the pipeline.
Correct : A. true
37. Water supply system for any village or city can be designed by
Correct : D. All of the above
38. In the gravitational system, normally Pressure in the pipe is
Correct : A. 2 to 7 kg/m3
39. In the gravitational system, normally Velocity of flow is
Correct : C. 1 to 2 m/sec
40. In the gravitational system, normally Diameter of pipe is
Correct : B. 10 to 45 cm
41. In the gravitational system, normally Water requirements is
Correct : D. 150 to 200 liter per capita per day.
42. While laying a pipeline we have to connect pipes of different lengths and diameters with one another to form a pipeline. Such a pipeline is called a
Correct : A. pipe line
43. Sometimes a compound pipe is required to be replaced by a pipe of uniform diameter and of the same length as that of the compound pipe is known as
Correct : C. equivalent pipe
44. A pipe line is 6 km long and having 20 cm diameter connect two reservoir 'A' and 'B'. The rate of discharge in the pipe is 30 lit/sec. Find out the difference in reservoir levels if friction factor
f = 0.0008.
Correct : C. 4.5 m
45. A compound pipe line is made up of pipe 45 cm dia. for 900 m, 37.5 cm for 450 m and 30 cm for 300 m is required to replace by a pipe of uniform diameter. Find diameter of equivalent pipe.
Correct : D. 0.37 m
46. When the free surface of a stream is in contact with the atmosphere and the flow is flowing due to gravitational force and atmospheric pressure, it is called
Correct : D. all of the above
47. When the free surface of a stream is in contact with the atmosphere and the flow is flowing due to gravitational force and atmospheric pressure, it is called pipe.
Correct : B. false
48. Flow into the canal, flows due to the slope of the bottom of the canal.
Correct : A. true
49. The roughness of the pipe depends upon the new or old pipe.
Correct : A. true
50. The cross-section is irregular in shape in artificial channel.
Correct : B. false
51. The bed and sides are smooth and regular in artificial channel.
Correct : A. true
52. Velocity flow and discharge is as per design in artificial channel.
Correct : B. false
53. Ratio of actual velocity of flow and critical velocity of flow is known as
Correct : B. Froude number
54. If fr = 1, then type of flow is
Correct : C. critical flow
55. If fr < 1, then type of flow is
Correct : B. sub critical flow
56. If fr > 1, then type of flow is
Correct : A. super critical flow
57. The perimeter of channel cross section which is in contact with flowing water is called
Correct : C. wetted perimeter
58. the ratio of cross sectional area to the wetted perimeter is called
Correct : A. hydraulic mean depth
59. For rectangular section, Hydraulic mean depth is
Correct : A. b × d = b + 2d
60. A sudden increase in the depth of canal flow is called
Correct : B. Hydraulic jump
61. The place, where the hydraulic jump takes place, a lot energy of the flowing liquid is
dissipated.
Correct : A. true
62. The measurement of velocity of flow. cross sectional area of river and discharge of water in
the river is known as