McqMate
Chapters
| 1. |
A flow in which the viscosity of fluid is dominating over the inertia force is called |
| A. | Steady flow |
| B. | Unsteady flow |
| C. | Laminar flow |
| D. | Turbulent flow |
| Answer» C. Laminar flow | |
| 2. |
The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid) |
| A. | K.ρ |
| B. | K/ρ |
| C. | ρ/K |
| D. | None of these |
| Answer» B. K/ρ | |
| 3. |
A fluid having no viscosity is known as |
| A. | Real fluid |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» B. Ideal fluid | |
| 4. |
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 |
| A. | 1/16 to 1/8 |
| B. | 1/8 to 1/4 |
| C. | 1/4 to 1/3 |
| D. | 1/3 to 1/2 |
| Answer» D. 1/3 to 1/2 | |
| 5. |
Liquids transmit pressure equally in all the directions. This is according to |
| A. | Boyle's law |
| B. | Archimedes principle |
| C. | Pascal's law |
| D. | Newton's formula |
| Answer» C. Pascal's law | |
| 6. |
The discharge over a triangular notch is |
| A. | Inversely proportional to H3/2 |
| B. | Directly proportional to H3/2 |
| C. | Inversely proportional to H5/2 |
| D. | Directly proportional to H5/2 |
| Answer» D. Directly proportional to H5/2 | |
| 7. |
A flow whose streamline is represented by a straight line, is called __________ dimensional flow. |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» A. One | |
| 8. |
The body will float if the force of buoyancy is __________ the weight of the liquid displaced. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 9. |
The density of water is 1000 kg/m3 at |
| A. | 0° C |
| B. | 0° K |
| C. | 4° C |
| D. | 20° C |
| Answer» C. 4° C | |
| 10. |
Bulk modulus of a fluid __________ as the pressure increases. |
| A. | Remain same |
| B. | Decreases |
| C. | Increases |
| D. | None of these |
| Answer» C. Increases | |
| 11. |
The coefficient of viscosity may be determined by |
| A. | Capillary tube method |
| B. | Orifice type viscometer |
| C. | Rotating cylinder method |
| D. | All of these |
| Answer» D. All of these | |
| 12. |
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain. |
| A. | Equal to |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» B. Directly proportional | |
| 13. |
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is |
| A. | 4.5 kN/m3 |
| B. | 6 kN/m3 |
| C. | 7.5 kN/m3 |
| D. | 10 kN/m3 |
| Answer» C. 7.5 kN/m3 | |
| 14. |
The increase of temperature results in |
| A. | Increase in viscosity of gas |
| B. | No changes in viscosity of liquid |
| C. | Decrease in viscosity of gas |
| D. | Decrease in viscosity of liquid |
| Answer» D. Decrease in viscosity of liquid | |
| 15. |
A manometer is used to measure |
| A. | Low pressure |
| B. | Moderate pressure |
| C. | High pressure |
| D. | Atmospheric pressure |
| Answer» C. High pressure | |
| 16. |
Which of the following meters is not associated with viscosity? |
| A. | Red wood |
| B. | Say bolt |
| C. | Engler |
| D. | Orsat |
| Answer» D. Orsat | |
| 17. |
The specific weight of water in S.I. units is taken as |
| A. | 9.81 kN/m3 |
| B. | 9.81 × 103 N/m3 |
| C. | 9.81 × 10-6 N/mm3 |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 18. |
Manometer is used to measure |
| A. | Pressure in pipes, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressure |
| D. | Difference of pressure between two points |
| Answer» A. Pressure in pipes, channels etc. | |
| 19. |
The flow in which conditions do not change with time at any point, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 20. |
A nozzle placed at the end of a water pipe line discharges water at a |
| A. | Low pressure |
| B. | High pressure |
| C. | Low velocity |
| D. | High velocity |
| Answer» D. High velocity | |
| 21. |
The pressure of fluid due to hammer blow is |
| A. | Directly proportional to density of fluid |
| B. | Inversely proportional to density of fluid |
| C. | Directly proportional to (density)1/2 of fluid |
| D. | Inversely proportional to (density)1/2 of fluid |
| Answer» C. Directly proportional to (density)1/2 of fluid | |
| 22. |
In order to measure the flow with a Venturimeter, it is installed in |
| A. | Horizontal line |
| B. | Inclined line with flow upwards |
| C. | Inclined line with flow downwards |
| D. | Any direction and in any location |
| Answer» D. Any direction and in any location | |
| 23. |
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water |
| A. | 51 cm |
| B. | 50 cm |
| C. | 52 cm |
| D. | 52.2 cm |
| Answer» A. 51 cm | |
| 24. |
According to equation of continuity, |
| A. | w1a1 = w2a2 |
| B. | w1v1 = w2v2 |
| C. | a1v1 = a2v2 |
| D. | a1/v1 = a2/v2 |
| Answer» C. a1v1 = a2v2 | |
| 25. |
One poise is equal to |
| A. | 0.1 N-s/m2 |
| B. | 1 N-s/m2 |
| C. | 10 N-s/m2 |
| D. | 100 N-s/m2 |
| Answer» A. 0.1 N-s/m2 | |
| 26. |
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures. |
| A. | Sum |
| B. | Difference |
| C. | Arithmetic mean |
| D. | Geometric mean |
| Answer» B. Difference | |
| 27. |
The mercury does not wet the glass. This is due to the property of the liquid known as |
| A. | Cohesion |
| B. | Adhesion |
| C. | Viscosity |
| D. | Surface tension |
| Answer» D. Surface tension | |
| 28. |
When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called |
| A. | Gauge pressure |
| B. | Absolute pressure |
| C. | Positive gauge pressure |
| D. | Vacuum pressure |
| Answer» C. Positive gauge pressure | |
| 29. |
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a |
| A. | Notch |
| B. | Weir |
| C. | Mouthpiece |
| D. | Nozzle |
| Answer» C. Mouthpiece | |
| 30. |
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. |
| A. | Equal to |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» B. Directly proportional | |
| 31. |
One stoke is equal to |
| A. | 10-2 m2/s |
| B. | 10-3 m2/s |
| C. | 10-4 m2/s |
| D. | 10-6 m2/s |
| Answer» C. 10-4 m2/s | |
| 32. |
Falling drops of water become spheres due to the property of |
| A. | Surface tension of water |
| B. | Compressibility of water |
| C. | Capillarity of water |
| D. | Viscosity of water |
| Answer» A. Surface tension of water | |
| 33. |
The specific gravity of an oil whose specific weight is 7.85 kN/m3, is |
| A. | 0.8 |
| B. | 1 |
| C. | 1.2 |
| D. | 1.6 |
| Answer» A. 0.8 | |
| 34. |
The length of the divergent cone in a Venturimeter is __________ that of the convergent cone. |
| A. | Equal to |
| B. | Double |
| C. | Three to four times |
| D. | Five to six times |
| Answer» C. Three to four times | |
| 35. |
The stress-strain relation of the Newtonian fluid is |
| A. | Linear |
| B. | Parabolic |
| C. | Hyperbolic |
| D. | Inverse type |
| Answer» A. Linear | |
| 36. |
The viscosity of a liquid __________ its rate of flow through a hole in a vessel. |
| A. | Effects |
| B. | Does not effect |
| C. | Both A and B |
| D. | None of these |
| Answer» A. Effects | |
| 37. |
The unit of surface tension is |
| A. | N/m |
| B. | N/m2 |
| C. | N/m3 |
| D. | N-m |
| Answer» A. N/m | |
| 38. |
The units of dynamic or absolute viscosity are |
| A. | Metres² per sec |
| B. | kg sec/meter |
| C. | Newton-sec per meter |
| D. | Newton-sec² per meter |
| Answer» C. Newton-sec per meter | |
| 39. |
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow. |
| A. | Incompressible |
| B. | Compressible |
| C. | Viscous |
| D. | None of these |
| Answer» A. Incompressible | |
| 40. |
The weight per unit volume of a liquid at a standard temperature and pressure is called |
| A. | Specific weight |
| B. | Mass density |
| C. | Specific gravity |
| D. | None of these |
| Answer» A. Specific weight | |
| 41. |
The flow of water through the hole in the bottom of a wash basin is an example of |
| A. | Steady flow |
| B. | Uniform flow |
| C. | Free vortex |
| D. | Forced vortex |
| Answer» C. Free vortex | |
| 42. |
A flow whose streamline is represented by a curve, is called |
| A. | One-dimensional flow |
| B. | Two-dimensional flow |
| C. | Three-dimensional flow |
| D. | Four-dimensional flow |
| Answer» B. Two-dimensional flow | |
| 43. |
The value of coefficient of discharge is __________ the value of coefficient of velocity. |
| A. | Less than |
| B. | Same as |
| C. | More than |
| D. | None of these |
| Answer» A. Less than | |
| 44. |
A fluid whose viscosity does not change with the rate of deformation or shear strain is known as |
| A. | Real fluid |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» B. Ideal fluid | |
| 45. |
Flow occurring in a pipeline when a valve is being opened is |
| A. | Steady |
| B. | Unsteady |
| C. | Laminar |
| D. | Vortex |
| Answer» B. Unsteady | |
| 46. |
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) |
| A. | wH/2 |
| B. | wH |
| C. | wH2/2 |
| D. | wH2/4 |
| Answer» C. wH2/2 | |
| 47. |
Euler's equation in the differential form for the motion of liquids is given by |
| A. | dp/ρ + g.dz + v.dv = 0 |
| B. | dp/ρ - g.dz + v.dv = 0 |
| C. | ρ.dp + g.dz + v.dv = 0 |
| D. | ρ.dp - g.dz + v.dv = 0 |
| Answer» A. dp/ρ + g.dz + v.dv = 0 | |
| 48. |
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) |
| A. | tanθ = a/g |
| B. | tanθ = 2 a/g |
| C. | tanθ = a/2g |
| D. | tanθ = a2/2g |
| Answer» A. tanθ = a/g | |
| 49. |
A point, in a compressible flow where the velocity of fluid is zero, is called |
| A. | Critical point |
| B. | Vena contracta |
| C. | Stagnation point |
| D. | None of these |
| Answer» C. Stagnation point | |
| 50. |
For very great pressures, viscosity of moss gases and liquids |
| A. | Remain same |
| B. | Increases |
| C. | Decreases |
| D. | Shows erratic behavior |
| Answer» D. Shows erratic behavior | |
| 51. |
The angle of contact in case of a liquid depends upon |
| A. | The nature of the liquid and the solid |
| B. | The material which exists above the free surface of the liquid |
| C. | Both of die above |
| D. | Any one of the above |
| Answer» C. Both of die above | |
| 52. |
Water is _________ liquid. |
| A. | A compressible |
| B. | An incompressible |
| C. | Both A and B |
| D. | None of these |
| Answer» B. An incompressible | |
| 53. |
The unit of kinematic viscosity in S. I. units is |
| A. | N-m/s |
| B. | N-s/m2 |
| C. | m2/s |
| D. | N-m |
| Answer» C. m2/s | |
| 54. |
Bernoulli's equation is applied to |
| A. | Venturimeter |
| B. | Orifice meter |
| C. | Pitot tube |
| D. | All of these |
| Answer» D. All of these | |
| 55. |
Rain drops are spherical because of |
| A. | Viscosity |
| B. | Air resistance |
| C. | Surface tension forces |
| D. | Atmospheric pressure |
| Answer» C. Surface tension forces | |
| 56. |
General energy equation holds for |
| A. | Steady flow |
| B. | Turbulent flow |
| C. | Laminar flow |
| D. | Non-uniform flow |
| Answer» D. Non-uniform flow | |
| 57. |
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will |
| A. | Decrease |
| B. | Increase |
| C. | Remain unchanged |
| D. | Depend upon the characteristics of liquid |
| Answer» A. Decrease | |
| 58. |
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure. |
| A. | Plus |
| B. | Minus |
| C. | Divide |
| D. | Multiply |
| Answer» B. Minus | |
| 59. |
The dynamic viscosity of gases __________ with rise in temperature. |
| A. | Remain unaffected |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» B. Increases | |
| 60. |
The pressure of liquid at throat in a Venturimeter is __________ than that at inlet. |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | None of these |
| Answer» B. Lower | |
| 61. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» B. Uniform flow | |
| 62. |
The specific weight of water is 1000 kg/m3 |
| A. | At normal pressure of 760 mm |
| B. | At 4°C temperature |
| C. | At mean sea level |
| D. | All the above |
| Answer» D. All the above | |
| 63. |
If the depth of water in an open channel is greater than the critical depth, the flow is called |
| A. | Critical flow |
| B. | Turbulent flow |
| C. | Tranquil flow |
| D. | Torrential flow |
| Answer» C. Tranquil flow | |
| 64. |
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 |
| A. | 500 kg |
| B. | 1000 kg |
| C. | 1500 kg |
| D. | 2000 kg |
| Answer» D. 2000 kg | |
| 65. |
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) |
| A. | 4wd/σ cosα |
| B. | σ cosα/4wd |
| C. | 4σ cosα/wd |
| D. | wd/4σ cosα |
| Answer» C. 4σ cosα/wd | |
| 66. |
Two dimensional flows occurs when |
| A. | The direction and magnitude of the velocity at all points are identical |
| B. | The velocity of successive fluid particles, at any point, is the same at successive periods of time |
| C. | The magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane |
| Answer» D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane | |
| 67. |
The force per unit length is the unit of |
| A. | Surface tension |
| B. | Compressibility |
| C. | Capillarity |
| D. | Viscosity |
| Answer» A. Surface tension | |
| 68. |
One cubic metre of water weighs |
| A. | 100 liters |
| B. | 250 liters |
| C. | 500 liters |
| D. | 1000 liters |
| Answer» D. 1000 liters | |
| 69. |
Kinematic viscosity is dependent upon |
| A. | Pressure |
| B. | Distance |
| C. | Density |
| D. | Flow |
| Answer» C. Density | |
| 70. |
The Euler's equation for the motion of liquids is based upon the assumption that |
| A. | The fluid is non - viscous, homogeneous and incompressible |
| B. | The velocity of flow is uniform over the section |
| C. | The flow is continuous, steady and along the stream line |
| D. | All of the above |
| Answer» D. All of the above | |
| 71. |
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Hot wire anemometer |
| D. | Pitot tube |
| Answer» D. Pitot tube | |
| 72. |
Property of a fluid by which its own molecules are attracted is called |
| A. | Adhesion |
| B. | Cohesion |
| C. | Viscosity |
| D. | Compressibility |
| Answer» B. Cohesion | |
| 73. |
Which of the following is the unit of kinematic viscosity? |
| A. | Pascal |
| B. | Poise |
| C. | Stoke |
| D. | Faraday |
| Answer» C. Stoke | |
| 74. |
A differential manometer is used to measure |
| A. | Atmospheric pressure |
| B. | Pressure in pipes and channels |
| C. | Pressure in Venturimeter |
| D. | Difference of pressures between two points in a pipe |
| Answer» D. Difference of pressures between two points in a pipe | |
| 75. |
In a venturi-flume, the flow takes place at |
| A. | Atmospheric pressure |
| B. | Gauge pressure |
| C. | Absolute pressure |
| D. | None of these |
| Answer» A. Atmospheric pressure | |
| 76. |
The normal stress is same in all directions at a point in a fluid |
| A. | Only when the fluid is frictionless |
| B. | Only when the fluid is incompressible and has zero viscosity |
| C. | When there is no motion of one fluid layer relative to an adjacent layer |
| D. | Irrespective of the motion of one fluid layer relative to an adjacent layer |
| Answer» C. When there is no motion of one fluid layer relative to an adjacent layer | |
| 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 per unit length is (where w = Specific weight of liquid, and H = Height of liquid) |
| A. | wH |
| B. | wH/2 |
| C. | wH2/2 |
| D. | wH2/3 |
| Answer» C. wH2/2 | |
| 78. |
Which of the following manometer has highest sensitivity? |
| A. | U-tube with water |
| B. | Inclined U-tube |
| C. | U-tube with mercury |
| D. | Micro-manometer with water |
| Answer» D. Micro-manometer with water | |
| 79. |
Which of the following statement is wrong? |
| A. | A flow whose streamline is represented by a curve is called two dimensional flow. |
| B. | The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy. |
| C. | The length of divergent portion in a Venturimeter is equal to the convergent portion. |
| D. | A pitot tube is used to measure the velocity of flow at the required point in a pipe. |
| Answer» C. The length of divergent portion in a Venturimeter is equal to the convergent portion. | |
| 80. |
Density of water is maximum at |
| A. | 0° C |
| B. | 0° K |
| C. | 4° C |
| D. | 100° C |
| Answer» C. 4° C | |
| 81. |
The bulk modulus of elasticity |
| A. | Has the dimensions of 1/pressure |
| B. | Increases with pressure |
| C. | Is large when fluid is more compressible |
| D. | Is independent of pressure and viscosity |
| Answer» B. Increases with pressure | |
| 82. |
Kinematic viscosity is equal to |
| A. | Dynamic viscosity/density |
| B. | Dynamic viscosity × density |
| C. | Density/dynamic viscosity |
| D. | 1/dynamic viscosity × density |
| Answer» A. Dynamic viscosity/density | |
| 83. |
The atmospheric pressure at sea level is |
| A. | 103 kN/m2 |
| B. | 10.3 m of water |
| C. | 760 mm of mercury |
| D. | All of these |
| Answer» D. All of these | |
| 84. |
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because |
| A. | It is easier to see through the glass tube |
| B. | Glass tube is cheaper than a metallic tube |
| C. | It is not possible to conduct this experiment with any other tube |
| D. | All of the above |
| Answer» A. It is easier to see through the glass tube | |
| 85. |
In an isothermal atmosphere, the pressure |
| A. | Decreases linearly with elevation |
| B. | Remain constant |
| C. | Varies in the same way as the density |
| D. | Increases exponentially with elevation |
| Answer» C. Varies in the same way as the density | |
| 86. |
The pressure of a liquid measured with the help of a Piezometer tube is |
| A. | Vacuum pressure |
| B. | Gauge pressure |
| C. | Absolute pressure |
| D. | Atmospheric pressure |
| Answer» B. Gauge pressure | |
| 87. |
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 |
| A. | Continuity equation |
| B. | Bernoulli's equation |
| C. | Pascal's law |
| D. | Archimedes’s principle |
| Answer» B. Bernoulli's equation | |
| 88. |
Uniform flow occurs when |
| A. | The direction and magnitude of the velocity at all points are identical |
| B. | The velocity of successive fluid particles, at any point, is the same at successive periods of time |
| C. | The magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure |
| Answer» C. The magnitude and direction of the velocity do not change from point to point in the fluid | |
| 89. |
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be |
| A. | Minimum |
| B. | Maximum |
| C. | Zero |
| D. | Could be any value |
| Answer» D. Could be any value | |
| 90. |
Piezometer is used to measure |
| A. | Pressure in pipe, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressures |
| D. | Difference of pressure between two points |
| Answer» C. Very low pressures | |
| 91. |
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 |
| A. | 2 metres of water column |
| B. | 3 metres of water column |
| C. | 3.5 metres of water column |
| D. | 4 m of water column |
| Answer» B. 3 metres of water column | |
| 92. |
The flow which neglects changes in a transverse direction is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» A. One dimensional flow | |
| 93. |
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 |
| A. | Pascal's law |
| B. | Archimedes’s principle |
| C. | D-Alembert's principle |
| D. | None of these |
| Answer» C. D-Alembert's principle | |
| 94. |
The mass per unit volume of a liquid at a standard temperature and pressure is called |
| A. | Specific weight |
| B. | Mass density |
| C. | Specific gravity |
| D. | None of these |
| Answer» B. Mass density | |
| 95. |
The velocity of the liquid flowing through the divergent portion of a Venturimeter |
| A. | Remains constant |
| B. | Increases |
| C. | Decreases |
| D. | Depends upon mass of liquid |
| Answer» C. Decreases | |
| 96. |
The volumetric change of the fluid caused by a resistance is known as |
| A. | Volumetric strain |
| B. | Volumetric index |
| C. | Compressibility |
| D. | Adhesion |
| Answer» C. Compressibility | |
| 97. |
Choose the wrong statement |
| A. | Fluids are capable of flowing |
| B. | Fluids conform to the shape of the containing vessels |
| C. | When in equilibrium, fluids cannot sustain tangential forces |
| D. | When in equilibrium, fluids can sustain shear forces |
| Answer» D. When in equilibrium, fluids can sustain shear forces | |
| 98. |
An orifice is said to be large, if |
| A. | The size of orifice is large |
| B. | The velocity of flow is large |
| C. | The available head of liquid is more than 5 times the height of orifice |
| D. | The available head of liquid is less than 5 times the height of orifice |
| Answer» D. The available head of liquid is less than 5 times the height of orifice | |
| 99. |
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury? |
| A. | The metal piece will simply float over the mercury |
| B. | The metal piece will be immersed in mercury by half |
| C. | Whole of the metal piece will be immersed with its top surface just at mercury level |
| D. | Metal piece will sink to the bottom |
| Answer» C. Whole of the metal piece will be immersed with its top surface just at mercury level | |
| 100. |
Dynamic viscosity of most of the liquids with rise in temperature |
| A. | Increases |
| B. | Decreases |
| C. | Remain unaffected |
| D. | Unpredictable |
| Answer» B. Decreases | |
Done Reading?