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.
| 301. |
Paper pulp is an example of _____________ fluid? |
| A. | Dilatant |
| B. | Bingham plastic |
| C. | Newtonian |
| D. | Pseudo-plastic |
| Answer» C. Newtonian | |
| 302. |
Open channel liquid flow is most conveniently measured by a__________________? |
| A. | Hot wire anemometer |
| B. | Notch |
| C. | Rotameter |
| D. | Segmental orifice |
| Answer» C. Rotameter | |
| 303. |
One poise (unit of absolute/dynamic viscosity) is equivalent to one_____________________? |
| A. | gm/cm2. sec |
| B. | gm/cm. sec |
| C. | cm2/sec |
| D. | m2/sec |
| Answer» C. cm2/sec | |
| 304. |
One horsepower is equal to________________? |
| A. | 550 lbf.ft/second |
| B. | 550 kgf.m/second |
| C. | Both A. and B. |
| D. | 550 lbf.ft./hr |
| Answer» B. 550 kgf.m/second | |
| 305. |
One dimensional fluid flow implies the ________________________? |
| A. | Flow in straight lines only |
| B. | Uniform flow |
| C. | Steady uniform flow |
| D. | Flow in which transverse components are zero |
| Answer» E. | |
| 306. |
One dimensional flow implies________________________? |
| A. | Flow in a straight line |
| B. | Steady uniform flow |
| C. | Unsteady uniform flow |
| D. | A flow which does not account for changes in transverse direction |
| Answer» E. | |
| 307. |
Normal depth in open channel flow is the depth of flow in the channel ____________________? |
| A. | Corresponding to uniform flow |
| B. | Measured normal to the channel bed |
| C. | Corresponding to steady flow |
| D. | None of these |
| Answer» B. Measured normal to the channel bed | |
| 308. |
Non-colloidal solution is an example of the _______________ fluid? |
| A. | Non-Newtonian |
| B. | Newtonian |
| C. | Dilatent |
| D. | Pseudo-plastic |
| Answer» C. Dilatent | |
| 309. |
Nominal size of the discharge pipe of a pump is usually _____________ the nominal size of the inlet pipe? |
| A. | Smaller than |
| B. | Larger than |
| C. | Same as |
| D. | Twice |
| Answer» B. Larger than | |
| 310. |
Nominal size of a pipe is an indication of its ______________ diameter? |
| A. | Inner |
| B. | Outer |
| C. | Approximate |
| D. | None of these |
| Answer» D. None of these | |
| 311. |
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its________________? |
| A. | Inner diameter |
| B. | Outer diameter |
| C. | Thickness |
| D. | Neither inner nor outer diameter |
| Answer» E. | |
| 312. |
Newton’s law of viscosity relates the____________________? |
| A. | Shear stress and velocity |
| B. | Velocity gradient and pressure intensity |
| C. | Shear stress and rate of angular deformation in a fluid |
| D. | Pressure gradient and rate of angular deformation |
| Answer» D. Pressure gradient and rate of angular deformation | |
| 313. |
Net positive suction head (NPSH) of a centrifugal pump must be____________________? |
| A. | Greater than the vapour pressure of the liquid |
| B. | Less than the vapour pressure of the liquid |
| C. | Equal to the vapour pressure of the liquid |
| D. | Less than barometric pressure |
| Answer» B. Less than the vapour pressure of the liquid | |
| 314. |
Navier-Stokes equation is useful in the analysis of _____________ fluid flow problems? |
| A. | Non-viscous |
| B. | Viscous |
| C. | Turbulent |
| D. | Rotational |
| Answer» C. Turbulent | |
| 315. |
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 | |
| 316. |
N. second/m2 is___________________? |
| A. | The S.I. unit of dynamic viscosity |
| B. | The S.I. unit of kinematic viscosity |
| C. | Equivalent to one poise |
| D. | Equivalent to one stoke |
| Answer» B. The S.I. unit of kinematic viscosity | |
| 317. |
Multistage compressors are used in industry, because they____________________? |
| A. | Reduce the cost of compressor |
| B. | Reduce the size requirement |
| C. | Resemble closely to isothermal compression |
| D. | Are easy to control |
| Answer» D. Are easy to control | |
| 318. |
Multistage centrifugal pumps are generally used for________________? |
| A. | High head |
| B. | Low head but high discharge |
| C. | Highly viscous liquid |
| D. | Slurries of high solid concentration |
| Answer» B. Low head but high discharge | |
| 319. |
Most of the centrifugal pumps used in chemical plants are usually ____________________ driven? |
| A. | Steam |
| B. | Diesel engine |
| C. | Electric motor |
| D. | Gas turbine |
| Answer» D. Gas turbine | |
| 320. |
Most commonly used joint in the underground pipe lines is the________________? |
| A. | Sleeve joint |
| B. | Coupling |
| C. | Flange |
| D. | Expansion joint |
| Answer» B. Coupling | |
| 321. |
Momentum transfer in laminar flow of fluids results due to the_________________? |
| A. | Viscosity |
| B. | Density |
| C. | Velocity gradient |
| D. | None of these |
| Answer» D. None of these | |
| 322. |
Momentum correction factor used in fluid flow problems accounts for the__________________? |
| A. | Change in direction of flow |
| B. | Change in total energy |
| C. | Change in pressure |
| D. | Non uniform direction of velocities at inlet & outlet sections |
| Answer» E. | |
| 323. |
Molten soap mass is transported by a ______________ pump? |
| A. | Diaphragm |
| B. | Reciprocating |
| C. | Gear |
| D. | Centrifugal |
| Answer» E. | |
| 324. |
Minimum porosity for fluidisation is____________________? |
| A. | That corresponding to static bed |
| B. | That corresponding to completely fluidised bed |
| C. | The porosity of the bed when true fluidisation begins |
| D. | Less than that of the’ static bed |
| Answer» D. Less than that of the’ static bed | |
| 325. |
Minimum fluidisation velocity for a specific system depends upon the___________________? |
| A. | Particle size |
| B. | Fluid viscosity |
| C. | Density of both the particle & the fluid |
| D. | All A., B. and C. |
| Answer» E. | |
| 326. |
Mercury is an ideal barometric fluid mainly due to its __________________? |
| A. | High density |
| B. | Low compressibility |
| C. | Low capillary action |
| D. | Very low vapor pressure |
| Answer» E. | |
| 327. |
Medium viscosity lubricating oil can be most ideally pumped by a ______________ pump? |
| A. | Vane |
| B. | Piston |
| C. | Centrifugal |
| D. | Plunger |
| Answer» B. Piston | |
| 328. |
Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be _____________________ ft? |
| A. | Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be _____________________ ft? |
| B. | 34 |
| C. | 8 |
| D. | 37 |
| Answer» D. 37 | |
| 329. |
Mass velocity is independent of temperature & pressure, when the flow is______________________? |
| A. | Unsteady through unchanged cross-section |
| B. | Steady through changing cross-section |
| C. | Steady and the cross-section is unchanged |
| D. | Unsteady and the cross-section is changed |
| Answer» D. Unsteady and the cross-section is changed | |
| 330. |
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the _________________? |
| A. | Temperature |
| B. | Pressure |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 331. |
Manometers measure the ______________ pressure? |
| A. | Vacuum as well as the atmospheric |
| B. | Difference in |
| C. | Absolute |
| D. | Gage |
| Answer» C. Absolute | |
| 332. |
Major loss in sudden contraction in pipe flow is due to ________________? |
| A. | Boundary friction |
| B. | Flow contraction |
| C. | Expansion of flow after sudden contraction |
| D. | None of these |
| Answer» C. Expansion of flow after sudden contraction | |
| 333. |
Maintenance cost of a ______________ pump for a particular duty is the least? |
| A. | Centrifugal |
| B. | Reciprocating |
| C. | Volute |
| D. | Gear |
| Answer» B. Reciprocating | |
| 334. |
Mach number is the ratio of the speed of the _____________________? |
| A. | Fluid to that of the light |
| B. | Light to that of the fluid |
| C. | Fluid to that of the sound |
| D. | Sound to that of the fluid |
| Answer» D. Sound to that of the fluid | |
| 335. |
Mach number is important in a fluid flow problem, when the inertia and _____________ forces predominate? |
| A. | Elastic |
| B. | Viscous |
| C. | Gravity |
| D. | None of these |
| Answer» B. Viscous | |
| 336. |
Lower BWG means _____________ of the tube? |
| A. | Lower thickness |
| B. | Lower cross-section |
| C. | Outer diameter |
| D. | Inner diameter |
| Answer» C. Outer diameter | |
| 337. |
Low specific speed of a pump implies that, it is a/an ______________ pump? |
| A. | Axial flow |
| B. | Centrifugal |
| C. | Mixed flow |
| D. | None of these |
| Answer» C. Mixed flow | |
| 338. |
Location of vena-contracta in an orificemeter does not depend upon the________________? |
| A. | Type of orifice |
| B. | Density, viscosity & compressibility of the fluid |
| C. | Ratio of pipe diameter to orifice diameter |
| D. | Pipe roughness |
| Answer» B. Density, viscosity & compressibility of the fluid | |
| 339. |
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head? |
| A. | Manometric |
| B. | Total |
| C. | Static |
| D. | Friction |
| Answer» B. Total | |
| 340. |
Laminar flow is characterised by the nonexistence of_________________? |
| A. | Pressure fluctuation |
| B. | Eddies |
| C. | Deviating velocities |
| D. | All A., B. & C. |
| Answer» E. | |
| 341. |
Laminar flow of a Newtonian fluid ceases to exist, when the Reynolds number exceeds___________________? |
| A. | 4000 |
| B. | 2100 |
| C. | 1500 |
| D. | 3000 |
| Answer» C. 1500 | |
| 342. |
Kinetic energy of fluid per unit weight represented by the velocity head is given by___________________? |
| A. | 2v2/gc |
| B. | v2/2gc |
| C. | ρv2/gc |
| D. | ρ.v2/2gc |
| Answer» C. ρv2/gc | |
| 343. |
It is possible to integrate an automatic flow controller to a________________? |
| A. | Flow nozzle |
| B. | Venturimeter |
| C. | Rotameter |
| D. | None of these |
| Answer» D. None of these | |
| 344. |
Isotropic turbulence occurs __________________? |
| A. | Where there is no velocity gradient |
| B. | At higher temperatures |
| C. | Only in Newtonian fluids |
| D. | None of these |
| Answer» B. At higher temperatures | |
| 345. |
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. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 346. |
____________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline? |
| A. | Venturimeter |
| B. | Pressure gauge |
| C. | Pitot tube |
| D. | Orificemeter |
| Answer» D. Orificemeter | |
| 347. |
______________ is an example of axial flow impeller? |
| A. | Paddle |
| B. | Turbine |
| C. | Propeller |
| D. | All A., B. and C. |
| Answer» D. All A., B. and C. | |
| 348. |
Interstage coolers are provided in a multistage compressor to____________________? |
| A. | Save power in compressing a given volume to a given pressure |
| B. | Cool the delivered air |
| C. | Achieve the exact delivery pressure |
| D. | None of these |
| Answer» B. Cool the delivered air | |
| 349. |
In turbulent flow, the__________________? |
| A. | Fluid particles move in an orderly manner |
| B. | Momentum transfer is on molecular scale only |
| C. | Shear stress is caused more effectively by cohesion than momentum transfer |
| D. | Shear stresses are generally larger than in a similar laminar flow |
| Answer» E. | |
| 350. |
In turbulent flow, a rough pipe has the same friction factor as a smooth pipe____________________? |
| A. | In the zone of complete turbulence |
| B. | When the roughness projections are much smaller than the thickness of the laminar film |
| C. | Everywhere in the transition zone |
| D. | When the friction factor is independent of the Reynold’s number |
| Answer» C. Everywhere in the transition zone | |