2. The lift force acts in _____ to the flow velocity.
Correct : A. Perpendicular direction
3. Which among the following is the correct formula for drag?
Correct : A. D = Cd * A * 0.5 * r * V2
4. Which among the following is the correct formula for lift?
Correct : A. D = Cl * A * 0.5 * r * V2
5. A flow in which the viscosity of fluid is dominating over the inertia force is called
Correct : C. Laminar flow
6. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ =
Density of the fluid)
Correct : B. K/ρ
7. A fluid having no viscosity is known as
Correct : B. Ideal fluid
8. In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at
throat to the diameter of pipe should be
Correct : D. 1/3 to 1/2
9. Liquids transmit pressure equally in all the directions. This is according to
Correct : C. Pascal's law
10. The discharge over a triangular notch is
Correct : D. Directly proportional to H5/2
11. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
Correct : A. One
12. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
Correct : C. More than
13. The density of water is 1000 kg/m3 at
Correct : C. 4° C
14. Bulk modulus of a fluid __________ as the pressure increases.
Correct : C. Increases
15. The coefficient of viscosity may be determined by
Correct : D. All of these
16. According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to
the rate of shear strain.
Correct : B. Directly proportional
17. A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is
Correct : C. 7.5 kN/m3
18. The increase of temperature results in
Correct : D. Decrease in viscosity of liquid
19. A manometer is used to measure
Correct : C. High pressure
20. Which of the following meters is not associated with viscosity?
Correct : D. Orsat
21. The specific weight of water in S.I. units is taken as
Correct : D. Any one of these
22. Manometer is used to measure
Correct : A. Pressure in pipes, channels etc.
23. The flow in which conditions do not change with time at any point, is known as
Correct : C. Steady flow
24. A nozzle placed at the end of a water pipe line discharges water at a
Correct : D. High velocity
25. The pressure of fluid due to hammer blow is
Correct : C. Directly proportional to (density)1/2 of fluid
26. In order to measure the flow with a Venturimeter, it is installed in
Correct : D. Any direction and in any location
27. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be
following cm of water
Correct : A. 51 cm
28. According to equation of continuity,
Correct : C. a1v1 = a2v2
29. One poise is equal to
Correct : A. 0.1 N-s/m2
30. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure
is the __________ of the two pressures.
Correct : B. Difference
31. The mercury does not wet the glass. This is due to the property of the liquid known as
Correct : D. Surface tension
32. 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
33. A pipe of length more than double the diameter of orifice fitted externally or internally to the
orifice is called a
Correct : C. Mouthpiece
34. An open tank containing liquid is moving with an acceleration on an inclined plane. The
inclination of the free surface of the liquid will be __________ to the acceleration of the tank.
Correct : B. Directly proportional
35. One stoke is equal to
Correct : C. 10-4 m2/s
36. Falling drops of water become spheres due to the property of
Correct : A. Surface tension of water
37. The specific gravity of an oil whose specific weight is 7.85 kN/m3, is
Correct : A. 0.8
38. The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.
Correct : C. Three to four times
39. The stress-strain relation of the Newtonian fluid is
Correct : A. Linear
40. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
Correct : A. Effects
41. The unit of surface tension is
Correct : A. N/m
42. The units of dynamic or absolute viscosity are
Correct : C. Newton-sec per meter
43. A flow in which the volume of a fluid and its density does not change during the flow is called
_________ flow.
Correct : A. Incompressible
44. The weight per unit volume of a liquid at a standard temperature and pressure is called
Correct : A. Specific weight
45. The flow of water through the hole in the bottom of a wash basin is an example of
Correct : C. Free vortex
46. A flow whose streamline is represented by a curve, is called
Correct : B. Two-dimensional flow
47. The value of coefficient of discharge is __________ the value of coefficient of velocity.
Correct : A. Less than
48. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
Correct : B. Ideal fluid
49. Flow occurring in a pipeline when a valve is being opened is
Correct : B. Unsteady
50. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific
weight of the liquid, and H = Height of the liquid)
Correct : C. wH2/2
51. Euler's equation in the differential form for the motion of liquids is given by
Correct : A. dp/ρ + g.dz + v.dv = 0
52. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
Correct : A. tanθ = a/g
53. A point, in a compressible flow where the velocity of fluid is zero, is called
Correct : C. Stagnation point
54. For very great pressures, viscosity of moss gases and liquids
Correct : D. Shows erratic behavior
55. The angle of contact in case of a liquid depends upon
Correct : C. Both of die above
56. Water is _________ liquid.
Correct : B. An incompressible
57. The unit of kinematic viscosity in S. I. units is
Correct : C. m2/s
58. Bernoulli's equation is applied to
Correct : D. All of these
59. Rain drops are spherical because of
Correct : C. Surface tension forces
60. General energy equation holds for
Correct : D. Non-uniform flow
61. With an increase in size of tube, the rise or depression of liquid in the tube due to surface
tension will
Correct : A. Decrease
62. Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric
pressure.
Correct : B. Minus
63. The dynamic viscosity of gases __________ with rise in temperature.
Correct : B. Increases
64. The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.
Correct : B. Lower
65. The flow in which the velocity vector is identical in magnitude and direction at every point, for
any given instant, is known as
Correct : B. Uniform flow
66. The specific weight of water is 1000 kg/m3
Correct : D. All the above
67. If the depth of water in an open channel is greater than the critical depth, the flow is called
Correct : C. Tranquil flow
68. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface
being 0.5 m below the water level will be
Correct : D. 2000 kg
69. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by
(where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)
Correct : C. 4σ cosα/wd
70. Two dimensional flows occurs when
Correct : D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
71. The force per unit length is the unit of
Correct : A. Surface tension
72. One cubic metre of water weighs
Correct : D. 1000 liters
73. Kinematic viscosity is dependent upon
Correct : C. Density
74. The Euler's equation for the motion of liquids is based upon the assumption that
Correct : D. All of the above
75. Which of the following instrument can be used for measuring speed of a submarine moving in
deep sea?
Correct : D. Pitot tube
76. Property of a fluid by which its own molecules are attracted is called
Correct : B. Cohesion
77. Which of the following is the unit of kinematic viscosity?
Correct : C. Stoke
78. A differential manometer is used to measure
Correct : D. Difference of pressures between two points in a pipe
79. In a venturi-flume, the flow takes place at
Correct : A. Atmospheric pressure
80. The normal stress is same in all directions at a point in a fluid
Correct : C. When there is no motion of one fluid layer relative to an adjacent layer
81. 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 per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
Correct : C. wH2/2
82. Which of the following manometer has highest sensitivity?
Correct : D. Micro-manometer with water
83. Which of the following statement is wrong?
Correct : C. The length of divergent portion in a Venturimeter is equal to the convergent portion.
84. Density of water is maximum at
Correct : C. 4° C
85. The bulk modulus of elasticity
Correct : B. Increases with pressure
86. Kinematic viscosity is equal to
Correct : A. Dynamic viscosity/density
87. The atmospheric pressure at sea level is
Correct : D. All of these
88. A glass tube of smaller diameter is used while performing an experiment for the capillary rise of
water because
Correct : A. It is easier to see through the glass tube
89. In an isothermal atmosphere, the pressure
Correct : C. Varies in the same way as the density
90. The pressure of a liquid measured with the help of a Piezometer tube is
Correct : B. Gauge pressure
91. For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains
the same, while the particle moves from one point to another. This statement is called
Correct : B. Bernoulli's equation
92. Uniform flow occurs when
Correct : C. The magnitude and direction of the velocity do not change from point to point in the fluid
93. At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear
stress will be
Correct : D. Could be any value
94. Piezometer is used to measure
Correct : C. Very low pressures
95. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The
pressure at 2.5 m below the oil surface will be
Correct : B. 3 metres of water column
96. The flow which neglects changes in a transverse direction is known as
Correct : A. One dimensional flow
97. A moving fluid mass may be brought to a static equilibrium position, by applying 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
98. The mass per unit volume of a liquid at a standard temperature and pressure is called
Correct : B. Mass density
99. The velocity of the liquid flowing through the divergent portion of a Venturimeter
Correct : C. Decreases
100. The volumetric change of the fluid caused by a resistance is known as