1. A flow in which the volume of a fluid and its density does no change during the flow is called
Correct : A. incompressible
2. The volume of a fluid
Correct : B. decreases
3. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
Correct : A. half the depth
4. The value of coefficient of discharge is
Correct : A. less than
5. A flow in which the viscosity of fluid is dominating over the inertia force is called
Correct : C. laminar flow
6. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.
Correct : A. True
7. A notch is, usually, made of a metallic plate.
Correct : A. Correct
8. The flow of water through the hole in the bottom of a wash basin is an example of
Correct : C. free vortex
9. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
Correct : B. Archimede's principle
10. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.
Correct : B. Disagree
11. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
Correct : A. pressure head
12. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
Correct : C. positive gauge pressure
13. The length of the divergent cone in a venturimeter is
Correct : C. three to four times
14. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.
Correct : A. Agree
15. The total energy line lies over the centre line of the pipe by an amount equal to
Correct : C. pressure head + velocity head
16. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
Correct : C. 10.4s
17. The pressure at a stagnation point is always low.
Correct : B. Disagree
18. In an internal mouthpiece, the absolute pressure head at vena contracta is
Correct : A. less than
19. The hydraulic mean depth for a circular pipe of diameter (d) is
Correct : B. d / 4
20. According to Newton's law of viscosity, the shear stress on a layer of a fluid is
Correct : B. directly proportional
21. A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
Correct : C. D-Alembert's principle
22. The siphon is used to connect two reservoirs at different levels intervened by a high ridge.
Correct : A. True
23. The discharge through a channel of circular section will be maximum when the depth of water is
Correct : D. 0.95 times
24. If the value of coefficient of discharge increases, the discharge through the orifice decreases.
Correct : B. False
25. The Francis formula for the discharge over Cippoletti weir is
Correct : C. 1.84 LH3/2
26. A differential manometer is used to measure
Correct : D. difference of pressures between two points in pipe
27. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure
Correct : A. varies as the square of the radial distance
28. The point at which the resultant pressure on an immersed surface acts, is known as
Correct : C. centre of pressure
29. The Reynold's number of a ship is
Correct : A. directly proportional
30. The purpose of a surge tank is
Correct : D. all of the above
31. In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
Correct : B. running free
32. Which of the following statement is wrong?
Correct : C. The length of divergent portion in a venturimeter is equal to the convergent portion.
33. The length of a liquid stream while flowing over a weir
Correct : C. contracts
34. If a body floating in a liqid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in
Correct : A. neutral
35. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
Correct : D. 800 kg / m3
36. A pitot tube is used to measure the
Correct : A. velocity of flow at the required point in a pipe
37. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.
Correct : B. False
38. The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid.
Correct : A. Agree
39. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
Correct : B. stream line
40. The viscosity of water is
Correct : A. higher
41. The siphon will work satisfactorily, if the minimum pressure in the pipe is
Correct : C. more than
42. When the Mach number is less than unity, the flow is called
Correct : A. sub-sonic flow
43. Froude's number is the ratio of inertia force to
Correct : C. gravity force
44. In flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow.
Correct : A. Agree
45. The coefficient of discharge in case of internal mouthpiece is
Correct : A. less than
46. The hydraulic gradient line is always parallel to the centre line of the pipe.
Correct : B. Incorrect
47. In two dimensional flow, the flow does not take place in a curve.
Correct : B. False
48. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.
Correct : A. Correct
49. Which of the following statement is correct ?
Correct : D. all of the above
50. The metacentric height is the distance between the
Correct : B. centre of gravity of the floating body and the metacentre
51. A structure whose width is
Correct : A. less than
52. One poise is equal to
Correct : A. 0.1 N-s/m2
53. According to equation of continuity,
Correct : C. a1v1 = a2v2
54. An air vessel is provided at the summit in a syphon to
Correct : A. avoid interruption in the flow
55. In a venturiflume, the flow takes place at
Correct : A. atmospheric pressure
56. The discharge over a triangular notch is
Correct : D. directly proportional to H5/2
57. Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
Correct : B. No
58. The total energy of a liquid particle in motion is equal to
Correct : A. pressure energy + kinetic energy + potential energy
59. The velocity of flow is same at all points in the cross-section of a channel.
Correct : B. False
60. A notch is used to measure
Correct : B. Disagree
61. The most efficient section of a channel is
Correct : D. trapezoidal
62. An orifice is said to be large, if
Correct : D. the available head of liquid is les than 5 times the height of orifice
63. A weir is said to be narrow-crested weir, if the width of the crest of the weir is
Correct : B. less than
64. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
Correct : A. Yes
65. Water is a
Correct : C. newtonian
66. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
Correct : C. mouthpiece
67. The body will sink down if the force of buoyancy is
Correct : B. less than
68. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance
Correct : B. one-fourth
69. The viscosity of water at 20? C is
Correct : D. one centipoise
70. A thick liquid like a syrup has a
Correct : B. greater
71. Laminar flow
Correct : A. takes
72. The surface tension of mercury at normal temperature is
Correct : C. higher than
73. An error of 1% in measuring head over the apex of the notch (H) will produce an error of
Correct : D. 2.50%
74. The pressure measured with the help of a piezometer tube is in
Correct : C. head of liquid
75. Bulk modulus of a fluid
Correct : C. increases
76. Gauge pressure at a point is equal to the absolute pressure
Correct : B. minus
77. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance
Correct : C. 2H / 3
78. A weir, generally, used as a spillway of a dam is
Correct : C. Ogee weir
79. The ratio of the inertia force to the
Correct : A. pressure force
80. One litre of water occupies a volume of
Correct : D. 1000 cm3
81. The density of air is same at different heights.
Correct : B. Incorrect
82. The maximum discharge over a broad crested weir is
Correct : D. 1.71 Cd x L x H3/2
83. The centre of pressure acts
Correct : C. below
84. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.
Correct : B. False
85. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the
Correct : B. difference
86. In the manufacturing of lead shots, the property of surface tension is utilised.
Correct : A. Agree
87. If a body floating in a liquid does not return back to its original position, and heels farther away when given a small angular displacement, the body is said to be in neutral equilibrium.
Correct : B. No
88. The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel
Correct : A. Correct
89. A body floating in a liquid is said to be in a stable equilibrium, if its metacentre coincides with its centre of gravity.
Correct : A. Agree
90. The body will float if the force of buoyancy is
Correct : C. more than
91. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
Correct : A. Correct
92. When the venturimeter is inclined, then for a given flow it will show
Correct : A. same
93. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
Correct : A. decrease
94. When the Mach number is equal to unity, the flow is called sonic flow.
Correct : A. True
95. A submerged body is said to be in a stable equilibrium, if its centre of gravity
Correct : B. lies below
96. If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.
Correct : B. False
97. The weight per unit volume of a liquid at a standard temperature and pressure is called
Correct : A. specific weight
98. The volume per unit mass of a liquid is called specific volume.
Correct : A. Yes
99. The flow at critical depth in an open channel is called torrential flow.
Correct : B. No
100. The reciprocal of Euler's number is called Newton number.