MCQOPTIONS
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MCQOPTIONS
This section includes 659 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an ________________? |
| A. | Pitot tube |
| B. | Venturimeter |
| C. | Orificemeter |
| D. | Rotameter |
| Answer» B. Venturimeter | |
| 52. |
Volute type of casing is provided in a centrifugal pump to___________________? |
| A. | Convert velocity head to pressure head |
| B. | Convert pressure head to velocity head |
| C. | Reduce the discharge fluctuation |
| D. | Increase the discharge |
| Answer» E. | |
| 53. |
Volute of a centrifugal pump should be designed in a fashion, such that the________________? |
| A. | Kinetic head gets converted into static head |
| B. | Moving stream gradually reduces velocity |
| C. | Mean velocity remains constant |
| D. | None of these |
| Answer» B. Moving stream gradually reduces velocity | |
| 54. |
Volume of liquid displaced by a floating body is equivalent to its_________________? |
| A. | Own weight |
| B. | Submerged weight |
| C. | Own volume |
| D. | Submerged volume |
| Answer» B. Submerged weight | |
| 55. |
Viscosity of water is about _____________ times that of air at room temperature? |
| A. | 15 |
| B. | 55 |
| C. | 155 |
| D. | 1050 |
| Answer» C. 155 | |
| 56. |
Viscosity of water at 40°C lies in the range of___________________? |
| A. | 1 × 10-3 to 2 × 10-3 kg/m.s |
| B. | 0.5 × 10-3 to 1 × 10-3 kg/m.s |
| C. | 1 to 2 kg/m.s |
| D. | 0.5 to 1 kg/m.s |
| Answer» C. 1 to 2 kg/m.s | |
| 57. |
Very small pressure difference (< 5 mm water column) can be most conveniently measured by a/an _____________ manometer? |
| A. | U-tube water |
| B. | U-tube mercury |
| C. | Inclined tube mercury |
| D. | Inclined tube water |
| Answer» E. | |
| 58. |
Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________? |
| A. | Weir |
| B. | Hot wire anemometer |
| C. | Cup and vane anemometer |
| D. | None of these |
| Answer» C. Cup and vane anemometer | |
| 59. |
Venturimeter and orificemeter measures the _____________ of the fluid? |
| A. | Pressure |
| B. | Maximum velocity |
| C. | Average velocity |
| D. | Point velocity |
| Answer» D. Point velocity | |
| 60. |
Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter ‘d’ ? |
| A. | d |
| B. | 0.5 d |
| C. | 2d |
| D. | 4d |
| Answer» C. 2d | |
| 61. |
Vena-contracta formed during flow of a liquid through an orificemeter has__________________? |
| A. | Minimum liquid cross-section |
| B. | More diameter compared to orifice diameter |
| C. | Minimum velocity of fluid stream |
| D. | None of these |
| Answer» B. More diameter compared to orifice diameter | |
| 62. |
Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flowmeters, because their ______________ is very low/small? |
| A. | Thermal conductivity |
| B. | Electrical conductivity |
| C. | Specific gravity |
| D. | Electrical resistivity |
| Answer» C. Specific gravity | |
| 63. |
Velocity at a certain point in case of streamline flow is_________________? |
| A. | Constant |
| B. | Independent of time |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 64. |
Velocity head on sudden enlargement in a horizontal pipe is converted into ______________ head? |
| A. | Elevation |
| B. | Pressure |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. & B. | |
| 65. |
Velocity distribution for flow between two fixed parallel plates_________________? |
| A. | Varies parabolically across the section |
| B. | Is constant over the entire cross-section |
| C. | Is zero at the plates and increases linearly to the mid-plane |
| D. | None of these |
| Answer» B. Is constant over the entire cross-section | |
| 66. |
Various efficiencies of a centrifugal pump are related as (where, εm = mechanical efficiency εv = volumetric efficiency. εma = manometric efficiency εo = overall efficiency) ? |
| A. | ηma × ηm × ηv = ηo |
| B. | ηm = ηv . ηma |
| C. | ηm = ηv . ηma |
| D. | ηv = ηm × ηma |
| Answer» C. ηm = ηv . ηma | |
| 67. |
Vane anemometer __________________? |
| A. | Is an area meter |
| B. | Is a variable head meter |
| C. | Rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed |
| D. | None of these |
| Answer» D. None of these | |
| 68. |
Upto what value of ‘Mach number’, a fluid may be considered as incompressible ? |
| A. | 0.03 |
| B. | 0.3 |
| C. | 3 |
| D. | 10 |
| Answer» C. 3 | |
| 69. |
Unsteady uniform flow is represented by flow through a/an_________________? |
| A. | Long pipe at constant rate |
| B. | Long pipe at decreasing rate |
| C. | Expanding tube at increasing rate |
| D. | Expanding tube at constant rate |
| Answer» C. Expanding tube at increasing rate | |
| 70. |
Unsteady non-uniform flow is represented by flow through a/an_________________? |
| A. | Long pipe at constant rate |
| B. | Long pipe at decreasing rate |
| C. | Expanding tube at increasing rate |
| D. | Expanding tube at constant rate |
| Answer» D. Expanding tube at constant rate | |
| 71. |
Unit of mass velocity is__________________? |
| A. | kg/hr |
| B. | kg/m2. hr |
| C. | kg/m2 |
| D. | kg/m3. hr |
| Answer» C. kg/m2 | |
| 72. |
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the_______________? |
| A. | Drag on particles |
| B. | Drag on column walls |
| C. | Bed height |
| D. | Bed voidage |
| Answer» D. Bed voidage | |
| 73. |
Two piping system are said to be equivalent, when the ______________ are same? |
| A. | Fluid flow rate & friction loss |
| B. | Length & friction factor |
| C. | Diameter & friction factor |
| D. | Length & diameter |
| Answer» B. Length & friction factor | |
| 74. |
Two liquids manometer is used for measuring small pressure differences in___________________? |
| A. | Liquids |
| B. | Gases |
| C. | Mixture of hydrocarbons |
| D. | None of these |
| Answer» C. Mixture of hydrocarbons | |
| 75. |
Two dimensional stream function________________? |
| A. | Relates velocity and pressure |
| B. | Is constant along a stream line |
| C. | Is constant along an equipotential surface |
| D. | None of these |
| Answer» C. Is constant along an equipotential surface | |
| 76. |
Turbulent flow generally occurs for cases involving__________________? |
| A. | Highly viscous fluid |
| B. | Very narrow passages |
| C. | Very slow motion |
| D. | None of these |
| Answer» E. | |
| 77. |
Turbine impeller____________________? |
| A. | Produces only radial current |
| B. | Produces only tangential current |
| C. | Is effective over wide range of viscosities |
| D. | Does not produce tangential current |
| Answer» D. Does not produce tangential current | |
| 78. |
Transition length for a turbulent fluid entering into a pipe is around _____________ times the pipe diameter? |
| A. | 5 |
| B. | 50 |
| C. | 500 |
| D. | 5000 |
| Answer» C. 500 | |
| 79. |
Transition length for turbulent flow in smooth pipe is equal to _____________ times the pipe diameter? |
| A. | 0.5 |
| B. | 5 |
| C. | 50 |
| D. | 500 |
| Answer» D. 500 | |
| 80. |
Transition from laminar flow to turbulent flow is aided by the__________________? |
| A. | Surface roughness and curvature (i.e. sharp corners) |
| B. | Vibration |
| C. | Pressure gradient and the compressibility of the flowing medium |
| D. | All A., B. & C. |
| Answer» E. | |
| 81. |
Toothpaste is a__________________? |
| A. | Bingham plastic |
| B. | Pseudo-plastic |
| C. | Newtonian liquid |
| D. | Dilatent |
| Answer» E. | |
| 82. |
To handle smaller quantity of fluid at higher discharge pressure, use a ______________ pump? |
| A. | Reciprocating |
| B. | Centrifugal |
| C. | Volute |
| D. | Rotary vacuum |
| Answer» B. Centrifugal | |
| 83. |
Theoretical head developed by a centrifugal pump does not depend upon the _____________ the impeller? |
| A. | Radius of |
| B. | Speed of |
| C. | Fluid velocity leaving |
| D. | None of these |
| Answer» E. | |
| 84. |
The vent valve provided in a liquid handling centrifugal pump is___________________? |
| A. | Generally a needle valve |
| B. | Used to release any gases that might be vapour locking the pump |
| C. | Helpful in easy removal of samples |
| D. | All A., B. and C. |
| Answer» E. | |
| 85. |
The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is__________________? |
| A. | Parabolic |
| B. | Flat |
| C. | Flat near the wall and parabolic in the middle |
| D. | Parabolic near the wall and flat in the middle |
| Answer» E. | |
| 86. |
The velocity profile for turbulent flow through a closed conduit is_______________? |
| A. | Logarithmic |
| B. | Parabolic |
| C. | Hyperbolic |
| D. | Linear |
| Answer» B. Parabolic | |
| 87. |
The velocity profile exhibited by laminar flow of Newtonian fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an ______________ with the apex at the centre line of the pipe? |
| A. | Hyperbola |
| B. | Parabola |
| C. | Semi-circle |
| D. | Semi-ellipse |
| Answer» C. Semi-circle | |
| 88. |
The velocity for subsonic flow in a pipeline_______________? |
| A. | Increases in the downstream direction |
| B. | Is constant |
| C. | Decreases in the downstream direction |
| D. | Is independent of the area of flow |
| Answer» B. Is constant | |
| 89. |
The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is_______________________? |
| A. | Hyperbolic |
| B. | Parabolic |
| C. | Linear |
| D. | None of these |
| Answer» C. Linear | |
| 90. |
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost is P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet ? |
| A. | P, Q and R |
| B. | P and R |
| C. | R and S |
| D. | P, Rand S |
| Answer» B. P and R | |
| 91. |
The valve used for very remote and accurate control of fluid is a _____________ valve? |
| A. | Needle |
| B. | Globe |
| C. | Gate |
| D. | Butterfly |
| Answer» B. Globe | |
| 92. |
The valve commonly used in pipes larger than 2″ dia is a______________? |
| A. | Globe valve |
| B. | Plug-cock |
| C. | Gate valve |
| D. | Check valve |
| Answer» D. Check valve | |
| 93. |
The value of critical Reynolds number for pipe flow is_________________? |
| A. | 1,300 |
| B. | 10,000 |
| C. | 100,000 |
| D. | None of these |
| Answer» B. 10,000 | |
| 94. |
The unit of velocity head is_________________? |
| A. | ft-lb/sec |
| B. | ft-lb/ft3 |
| C. | ft-lbf/lb |
| D. | ft-lbf/sec |
| Answer» D. ft-lbf/sec | |
| 95. |
The unit of dynamic viscosity in SI unit is__________________? |
| A. | kg/m. sec |
| B. | N/m2 |
| C. | m2 /sec |
| D. | m/N. sec |
| Answer» B. N/m2 | |
| 96. |
The unit of bulk modulus of elasticity for a liquid in S.I. unit is____________________? |
| A. | N |
| B. | N/m |
| C. | N/m2 |
| D. | N/m3 |
| Answer» D. N/m3 | |
| 97. |
The uniformity of a gas fluidised bed depends upon the _______________ of the solid particles? |
| A. | Size |
| B. | Surface properties |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 98. |
The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its __________________? |
| A. | Absolute viscosity |
| B. | Ratio of absolute viscosity to density |
| C. | Density |
| D. | Reynolds number |
| Answer» C. Density | |
| 99. |
The time of oscillation of a floating body is _________________? |
| A. | Longer, if Metacentric height is increased |
| B. | Independent of the Metacentric height |
| C. | Dependent on the buoyant forces only |
| D. | None of these |
| Answer» E. | |
| 100. |
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke’s law range is proportional to the_____________________? |
| A. | Inverse of fluid viscosity |
| B. | Square of particle size |
| C. | Difference in the densities of the particle & fluid |
| D. | All A., B. and C. |
| Answer» E. | |