1. Pascal-second is the unit of _______.
2. An ideal fluid is _______.
3. The unit of kinematic viscosity is _______.
4. If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is
5. The viscosity of a gas _______.
6. Newton's law of viscosity relates _______.
7. An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be
8. The position of centre of pressure on a plane surface immersed vertically in a static mass of fluid is
9. The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to _______.
10. A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of centre of pressure below the free surface will be at a distance of
11. Centre of buoyancy always _______.
12. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will _______.
13. Metacentric height for small values of angle of heel is the distance between the
14. A floating body is said to be in a state of stable equilibrium
15. The increase in metacentric height _______.
16. A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is
17. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
18. If a vessel containing liquid moves downward with a constant acceleration equal to 'g' then
19. When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies
20. An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to
21. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the centre of bottom is
22. The horizontal component of force on a curved surface is equal to the
23. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
24. The eddy viscosity for turbulent flow is _______.
25. Flow at constant rate through a tapering pipe is ________.
26. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is
27. When the velocity distribution is uniform over the cross-section, the correction factor for momentum is
28. Least possible value of correction factor for______.
29. If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is
30. If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is
31. The continuity equationpi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid
32. Which of the following velocity potentials satisfies continuity equation ?
33. The motion of air mass in a tornado is a _______.
34. In a forced vortex motion, the velocity of flow is ______.
35. Stream lines and path lines always coincide in case of
36. Equation of continuity is based on the principle of conservation of
37. In steady flow of a fluid, the total accele ration of any fluid particle
38. The pitot tube is used to measure
39. Hot wire anemometer is used to measure
40. The theoretical value of coefficient of contraction of a sharp edged orifice is
41. Which of the following is used to measure the discharge ?
42. Select the incorrect statement.
43. Size of a venturimeter is specified by
44. Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by
45. The discharge through a V- notch varies as
46. Which of the following is an incorrect statement ?
47. Coefficient of velocity of venturimeter
48. The pressure at the summit of a syphon is _____.
49. Any between two stream lines represents ______.
50. Coefficient of velocity for Borda's mouth piece running full is
51. Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is
52. The major loss of energy in long pipes is due to
53. Coefficient of contraction for an external cylindrical mouthpiece is
54. Which of the following has highest coefficient of discharge ?
55. In a Sutro weir, the discharge is proportional to
56. The discharge over a broad crested weir is maximum when the depth of flow is
57. Which of the following statements is correct?
58. For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be
59. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is
60. Surge wave in a rectangular channel is an example of
61. Stanton diagram is a _______.
62. The depth 'd' below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be
63. The boundary layer thickness in turbulent flow varies as
64. The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is
65. If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is
66. In case of an airfoil, the separation of flow occurs
67. When an ideal fluid flows past a sphere,
68. With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on
69. In which of the following the friction drag is generally larger than pressure drag?
70. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is
71. The value of friction factor 'f' for smooth pipes for Reynolds number 106 is approximately equal to
72. For laminar flow in a pipe of circular cross-section, the Darcy's friction factor f is
73. Separation of flow occurs when ______.
74. The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is
75. The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is
76. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is
77. The Prattler mixing length is ______.
78. The velocity distribution for laminar flow through a circular tube
79. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be
80. The losses are more in _______.
81. The wake is _______.
82. The maximum thickness of boundary layer in a pipe of radius r is
83. The hydraulic grade line is _______.
84. Two pipe systems are said to be equivalent when
85. In series-pipe problems ______.
86. Select the correct statement.
87. A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be
88. The speed of a pressure wave through a pipe depends upon
89. When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is
90. If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be
91. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is
92. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is
93. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is
94. The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec.The boundary layer thickness at a distance of 4 m is
95. Drag force is a function of ______.
96. The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is
97. For laminar flow in circular pipes, the Darcy's friction factor f is equal to
2. An ideal fluid is _______.
3. The unit of kinematic viscosity is _______.
4. If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is
5. The viscosity of a gas _______.
6. Newton's law of viscosity relates _______.
7. An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be
8. The position of centre of pressure on a plane surface immersed vertically in a static mass of fluid is
9. The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to _______.
10. A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of centre of pressure below the free surface will be at a distance of
11. Centre of buoyancy always _______.
12. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will _______.
13. Metacentric height for small values of angle of heel is the distance between the
14. A floating body is said to be in a state of stable equilibrium
15. The increase in metacentric height _______.
16. A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is
17. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
18. If a vessel containing liquid moves downward with a constant acceleration equal to 'g' then
19. When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies
20. An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to
21. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the centre of bottom is
22. The horizontal component of force on a curved surface is equal to the
23. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
24. The eddy viscosity for turbulent flow is _______.
25. Flow at constant rate through a tapering pipe is ________.
26. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is
27. When the velocity distribution is uniform over the cross-section, the correction factor for momentum is
28. Least possible value of correction factor for______.
29. If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is
30. If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is
31. The continuity equationpi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid
32. Which of the following velocity potentials satisfies continuity equation ?
33. The motion of air mass in a tornado is a _______.
34. In a forced vortex motion, the velocity of flow is ______.
35. Stream lines and path lines always coincide in case of
36. Equation of continuity is based on the principle of conservation of
37. In steady flow of a fluid, the total accele ration of any fluid particle
38. The pitot tube is used to measure
39. Hot wire anemometer is used to measure
40. The theoretical value of coefficient of contraction of a sharp edged orifice is
41. Which of the following is used to measure the discharge ?
42. Select the incorrect statement.
43. Size of a venturimeter is specified by
44. Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by
45. The discharge through a V- notch varies as
46. Which of the following is an incorrect statement ?
47. Coefficient of velocity of venturimeter
48. The pressure at the summit of a syphon is _____.
49. Any between two stream lines represents ______.
50. Coefficient of velocity for Borda's mouth piece running full is
51. Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is
52. The major loss of energy in long pipes is due to
53. Coefficient of contraction for an external cylindrical mouthpiece is
54. Which of the following has highest coefficient of discharge ?
55. In a Sutro weir, the discharge is proportional to
56. The discharge over a broad crested weir is maximum when the depth of flow is
57. Which of the following statements is correct?
58. For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be
59. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is
60. Surge wave in a rectangular channel is an example of
61. Stanton diagram is a _______.
62. The depth 'd' below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be
63. The boundary layer thickness in turbulent flow varies as
64. The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is
65. If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is
66. In case of an airfoil, the separation of flow occurs
67. When an ideal fluid flows past a sphere,
68. With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on
69. In which of the following the friction drag is generally larger than pressure drag?
70. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is
71. The value of friction factor 'f' for smooth pipes for Reynolds number 106 is approximately equal to
72. For laminar flow in a pipe of circular cross-section, the Darcy's friction factor f is
73. Separation of flow occurs when ______.
74. The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is
75. The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is
76. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is
77. The Prattler mixing length is ______.
78. The velocity distribution for laminar flow through a circular tube
79. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be
80. The losses are more in _______.
81. The wake is _______.
82. The maximum thickness of boundary layer in a pipe of radius r is
83. The hydraulic grade line is _______.
84. Two pipe systems are said to be equivalent when
85. In series-pipe problems ______.
86. Select the correct statement.
87. A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be
88. The speed of a pressure wave through a pipe depends upon
89. When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is
90. If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be
91. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is
92. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is
93. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is
94. The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec.The boundary layer thickness at a distance of 4 m is
95. Drag force is a function of ______.
96. The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is
97. For laminar flow in circular pipes, the Darcy's friction factor f is equal to
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