MCQOPTIONS
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MCQOPTIONS
This section includes 1608 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
*/*_Sewage sludge is an example of the __________ fluid.? |
| A. | Bingham plastic |
| B. | Newtonion |
| C. | Pseudoplastic |
| D. | Dilatent |
| Answer» B. Newtonion | |
| 352. |
*/*_What causes convective acceleration in fluid flow?? |
| A. | Steep slope in flow |
| B. | Unsteady nature of flow |
| C. | Non-uniformity of flow |
| D. | Turbulence in flow |
| Answer» D. Turbulence in flow | |
| 353. |
*/*_Buckingham-π theorem states that in any physical problem including 'n' quantities having 'm' diamensions, the quantities can be arranged into __________ independent dimensionless parameters.? |
| A. | M |
| B. | N |
| C. | N-m |
| D. | N/m |
| Answer» D. N/m | |
| 354. |
*/*_Piezometric head is the sum of the __________ heads.? |
| A. | Elevation & kinetic energy |
| B. | Elevation & pressure |
| C. | Kinetic energy & pressure |
| D. | None of these |
| Answer» C. Kinetic energy & pressure | |
| 355. |
*/*_Check valve is used for __________ flow.? |
| A. | Very precise control of |
| B. | Unidirectional |
| C. | Multidirectional |
| D. | None of these |
| Answer» C. Multidirectional | |
| 356. |
*/*_Pressure co-efficient is the ratio of pressure forces to __________ forces.? |
| A. | Gravity |
| B. | Inertial |
| C. | Viscous |
| D. | None of these |
| Answer» C. Viscous | |
| 357. |
*/*_Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe.? |
| A. | Diameter |
| B. | Colour |
| C. | Altitude |
| D. | None of these |
| Answer» C. Altitude | |
| 358. |
*/*_Cavitation can be prevented by? |
| A. | Suitably designing the pump |
| B. | Maintaining the suction head sufficiently greater than the vapour pressure |
| C. | Maintaining suction head = developed head |
| D. | Maintaining suction head lower than the vapour pressure |
| Answer» C. Maintaining suction head = developed head | |
| 359. |
*/*_Check valves are used? |
| A. | At high pressure |
| B. | In bends |
| C. | For controlling water flow |
| D. | For unidirectional flow |
| Answer» E. | |
| 360. |
*/*_Cocks are used to control? |
| A. | Water |
| B. | Any liquid |
| C. | Solids |
| D. | None of these |
| Answer» C. Solids | |
| 361. |
*/*_With increase in the shear rate, the apparent viscosity of pseudoplastic fluids? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | May increase or decrease; depends on the magnitude of shear rate |
| Answer» C. Remains same | |
| 362. |
*/*_The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the? |
| A. | Discharge |
| B. | Suction |
| C. | Suction minus vapor pressure of the liquid at suction temperature |
| D. | Discharge minus vapor pressure of the liquid at the discharge temperature |
| Answer» D. Discharge minus vapor pressure of the liquid at the discharge temperature | |
| 363. |
*/*_In case of turbulent flow of fluid through a circular pipe, the? |
| A. | Mean flow velocity is about 0.5 times the maximum velocity |
| B. | Velocity profile becomes flatter and flatter with increasing Reynolds number |
| C. | Point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius) |
| D. | Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more |
| Answer» E. | |
| 364. |
*/*_The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)? |
| A. | x |
| B. | πx |
| C. | 2x |
| D. | x/2 |
| Answer» B. ≈ì√Ñx | |
| 365. |
*/*_Which of the following is used for very accurate measurement of flow of gas at low velocity?? |
| A. | Pitot tube |
| B. | Rotameter |
| C. | Segmental orificemeter |
| D. | Hot wire annemometer |
| Answer» E. | |
| 366. |
*/*_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 | |
| 367. |
*/*_Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the? |
| A. | Wall roughness |
| B. | Reynolds number |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 368. |
*/*_Purpose of air lift pump is to? |
| A. | Compress air |
| B. | Lift compressed air |
| C. | Lift water from a well by using compressed air |
| D. | Lift air under negative pressure |
| Answer» D. Lift air under negative pressure | |
| 369. |
*/*_Pipes having diameter 14 inches or more are designated by their? |
| A. | Outside diameter |
| B. | Inside diameter |
| C. | Schedule number |
| D. | None of these |
| Answer» B. Inside diameter | |
| 370. |
*/*_The Prandtl pitot tube measures the? |
| A. | Velocity at a point in the flow |
| B. | Pressure at a point |
| C. | Average flow velocity |
| D. | Pressure difference in pipe flow |
| Answer» B. Pressure at a point | |
| 371. |
*/*_The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid.? |
| A. | Newtonion |
| B. | Dilatant |
| C. | Pseudoplastic |
| D. | Non-Newtonion |
| Answer» B. Dilatant | |
| 372. |
*/*_Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.? |
| A. | Small differential |
| B. | Atmospheric |
| C. | Absolute |
| D. | Gage |
| Answer» B. Atmospheric | |
| 373. |
*/*_The flow of gas along a pipe in the direction of decreasing pressure causes decrease in its? |
| A. | Viscosity |
| B. | Specific volume |
| C. | Velocity |
| D. | None of these |
| Answer» C. Velocity | |
| 374. |
*/*_Design of the casing of centrifugal pump should be such as to minimise the? |
| A. | Back flow through impeller |
| B. | Loss of kinetic head |
| C. | Loss of static head |
| D. | None of these |
| Answer» C. Loss of static head | |
| 375. |
*/*_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 | |
| 376. |
*/*_Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.? |
| A. | 1 |
| B. | 0.1 |
| C. | 0.01 |
| D. | 0.001 |
| Answer» D. 0.001 | |
| 377. |
*/*_Path followed by water jet issuing from the bottom of a water tank will be a? |
| A. | Parabola (vertex being at the opening) |
| B. | Hyperbola |
| C. | Horizontal straight line |
| D. | Zig-zag path (which is geometrically undefined) |
| Answer» B. Hyperbola | |
| 378. |
*/*_In deriving Bernoulli's equation, fluid is assumed to be? |
| A. | Incompressible, frictionless, steady, along a streamline |
| B. | Uniform, steady, incompressible, along a streamline |
| C. | Steady, density being pressure dependent, frictionless |
| D. | None of these |
| Answer» B. Uniform, steady, incompressible, along a streamline | |
| 379. |
*/*_Bernoull's equation does not apply to the functioning of a/an? |
| A. | Venturimeter |
| B. | Orificem |
| C. | Pitot tube |
| D. | None of these |
| Answer» E. | |
| 380. |
*/*_Nature of fluid flow during the opening of a valve in a pipeline is? |
| A. | Laminar |
| B. | Unsteady |
| C. | Steady |
| D. | Uniform |
| Answer» C. Steady | |
| 381. |
*/*_The simple pitot tube does not measure the? |
| A. | Static pressure |
| B. | Dynamic pressure |
| C. | Velocity at the stagnation point |
| D. | All of the above |
| Answer» E. | |
| 382. |
*/*_The maximum head that can be developed by a single impeller is __________ ft.? |
| A. | 25 |
| B. | 100 |
| C. | 250-300 |
| D. | 1000 |
| Answer» D. 1000 | |
| 383. |
*/*_A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.? |
| A. | 17 |
| B. | 42 |
| C. | 84 |
| D. | 1.8 |
| Answer» B. 42 | |
| 384. |
*/*_Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?? |
| A. | ε = ε0 + α.t |
| B. | ε = ε0 + α.t² |
| C. | ε = ε0 + α.t³ |
| D. | ε = ε0 + α.t⁴ |
| Answer» B. ≈í¬µ = ≈í¬µ0 + ≈í¬±.t¬¨‚⧠| |
| 385. |
*/*_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 | |
| 386. |
*/*_Air vessel of a reciprocating pump is initially filled with? |
| A. | Atmospheric air |
| B. | Compressed air |
| C. | Water |
| D. | None of these |
| Answer» C. Water | |
| 387. |
*/*_Which law is followed by the velocity distribution in the turbulent boundary layer?? |
| A. | Parabolic law |
| B. | Linear law |
| C. | Logarithmic law |
| D. | None of these |
| Answer» D. None of these | |
| 388. |
*/*_Which of the following has the minimum compressibility?? |
| A. | Water at room temperature |
| B. | Air at room temperature |
| C. | Oxygen at room temperature |
| D. | Nitrogen at room temperature |
| Answer» B. Air at room temperature | |
| 389. |
*/*_I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch? |
| A. | 4.728 |
| B. | 0.5 |
| C. | 0.622 |
| D. | 0.474 |
| Answer» D. 0.474 | |
| 390. |
*/*_In fluid flow, cavitation is caused, if the? |
| A. | Fluid velocity decreases to zero |
| B. | Total energy decreases |
| C. | Both A and B |
| D. | Flow pressure approaches its vapor pressure at the prevailing temperature |
| Answer» E. | |
| 391. |
*/*___________ pumps are axial flow pumps.? |
| A. | Turbine |
| B. | Propeller |
| C. | Diffuser |
| D. | None of these |
| Answer» C. Diffuser | |
| 392. |
*/*_In isotropic turbulence, the __________ are equal to each other.? |
| A. | Temporal velocity components |
| B. | Mean square of velocity fluctuations in the three co-ordinate directions |
| C. | Root mean square of velocity fluctuations in the three co-ordinate directions |
| D. | None of these |
| Answer» C. Root mean square of velocity fluctuations in the three co-ordinate directions | |
| 393. |
*/*_Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.? |
| A. | 0.5 |
| B. | 5 |
| C. | 50 |
| D. | 100 |
| Answer» D. 100 | |
| 394. |
*/*_Drag co-efficient in hindered settling is __________ that in free settling.? |
| A. | Less than |
| B. | Equal to |
| C. | Not necessarily greater than |
| D. | Always greater than |
| Answer» E. | |
| 395. |
*/*_Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.? |
| A. | Shear stress |
| B. | Shear force |
| C. | Average drag per unit projected area |
| D. | None of these |
| Answer» D. None of these | |
| 396. |
*/*_In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.? |
| A. | Directly proportional to |
| B. | Inversely proportional to |
| C. | Inversely proportional to the square root of |
| D. | Independent of |
| Answer» C. Inversely proportional to the square root of | |
| 397. |
*/*_In magnetic flow meters, voltage generation is? |
| A. | Due to the motion of conducting fluid through an externally generated uniform field |
| B. | Proportional to the fluid velocity |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 398. |
*/*_The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10⁻⁶m²/s).? |
| A. | 24000 |
| B. | 24 |
| C. | 0.24 |
| D. | 0.44 |
| Answer» E. | |
| 399. |
*/*_In laminar flow through a round tube, the discharge varies? |
| A. | Linearly as the viscosity |
| B. | Inversely as the pressure drop |
| C. | Inversely as the viscosity |
| D. | As the square of the radius |
| Answer» D. As the square of the radius | |
| 400. |
*/*_The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and? |
| A. | Moving |
| B. | Static |
| C. | Cold |
| D. | Hot |
| Answer» B. Static | |