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.
| 401. |
*/*_Fanning friction factor equation applies to the __________ fluid flow.? |
| A. | Non-isothermal condition of |
| B. | Compressible |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» E. | |
| 402. |
*/*_In a free vortex, the? |
| A. | Velocity changes linearly with radial distance |
| B. | Flow is necessarily rotational |
| C. | Radial component of velocity is same everywhere |
| D. | Stream lines are not circular |
| Answer» B. Flow is necessarily rotational | |
| 403. |
*/*_Weber number is the ratio of inertial force to __________ force.? |
| A. | Surface tension |
| B. | Gravity |
| C. | Viscous |
| D. | Elastic |
| Answer» B. Gravity | |
| 404. |
*/*_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 | |
| 405. |
*/*_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. | |
| 406. |
*/*_The line of action of the buoyant force passes through the centre of gravity of the? |
| A. | Submerged body |
| B. | Displaced volume of the fluid |
| C. | Volume of fluid vertically above the body |
| D. | Horizontal projection of the body |
| Answer» C. Volume of fluid vertically above the body | |
| 407. |
*/*_Stoke's law is valid, when the particle Reynolds number is? |
| A. | < 1 |
| B. | > 1 |
| C. | < 5 |
| D. | None of these |
| Answer» B. > 1 | |
| 408. |
*/*_What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.? |
| A. | 4πg/3 |
| B. | 0.01πgH/4 |
| C. | 0.01πgH/8 |
| D. | 0.04πgH/3 |
| Answer» B. 0.01≈ì√ÑgH/4 | |
| 409. |
*/*_With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)? |
| A. | Decreases |
| B. | Increases linearly |
| C. | Increases exponentially |
| D. | Remains constant |
| Answer» C. Increases exponentially | |
| 410. |
*/*_Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton's law of viscosity.(II) Newton's second law of motion. (III) The continuity equation.(IV) Velocity of boundary layer must be zero relative to boundary.(V) Fluid cannot penetrate a boundary.? |
| A. | I, II, III |
| B. | II, III, V |
| C. | I, II, V |
| D. | II, IV, V |
| Answer» C. I, II, V | |
| 411. |
*/*_Very small pressure difference (< 5 mm water coloumn) 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. | |
| 412. |
*/*_The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation? |
| A. | dq/dx = K |
| B. | dq/dx = K.q |
| C. | dq/dx = K/q |
| D. | dq/dx = Kq² |
| Answer» B. dq/dx = K.q | |
| 413. |
*/*_Rise of liquid in a capillary tube is due to? |
| A. | Cohesion |
| B. | Adhesion |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 414. |
*/*_The speed of sound in an ideal gas varies as the? |
| A. | Temperature |
| B. | Pressure |
| C. | Density |
| D. | None of these |
| Answer» B. Pressure | |
| 415. |
*/*_If the head over the triangular notch is doubled, the discharge will increase by __________ times.? |
| A. | 2 |
| B. | 2.828 |
| C. | 5.657 |
| D. | 4 |
| Answer» D. 4 | |
| 416. |
*/*_Boiler feed water pump is usually a __________ pump.? |
| A. | Reciprocating |
| B. | Gear |
| C. | Multistage centrifugal |
| D. | Diaphragm |
| Answer» D. Diaphragm | |
| 417. |
*/*_A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units)If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is? |
| A. | 12 mm/s |
| B. | 16 mm/s |
| C. | 24 mm/s |
| D. | 28 mm/s |
| Answer» C. 24 mm/s | |
| 418. |
*/*_Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.? |
| A. | Less than |
| B. | More than |
| C. | Same as |
| D. | None of these |
| Answer» C. Same as | |
| 419. |
%_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 | |
| 420. |
%_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 | |
| 421. |
%_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 | |
| 422. |
%_Fanning friction factor equation applies to the __________ fluid flow._% |
| A. | Non-isothermal condition of |
| B. | Compressible |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» E. | |
| 423. |
%_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 | |
| 424. |
%_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 | |
| 425. |
%_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 | |
| 426. |
%_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 | |
| 427. |
%___________ pumps are axial flow pumps._% |
| A. | Turbine |
| B. | Propeller |
| C. | Diffuser |
| D. | None of these |
| Answer» C. Diffuser | |
| 428. |
%_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. | |
| 429. |
%_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. | |
| 430. |
%_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 | |
| 431. |
%_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 | |
| 432. |
%_Terminal velocity is_% |
| A. | A constant velocity with no acceleration |
| B. | A fluctuating velocity |
| C. | Attained after moving one-half of total distance |
| D. | None of these |
| Answer» B. A fluctuating velocity | |
| 433. |
%_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 | |
| 434. |
%_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 | |
| 435. |
%_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 | |
| 436. |
%_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. | |
| 437. |
%_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. | |
| 438. |
%_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 | |
| 439. |
%_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¬¨‚⧠| |
| 440. |
%_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 | |
| 441. |
%_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 | |
| 442. |
%_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. | |
| 443. |
%_Draining of shallow pits or sump is done by a sump pump, which is a __________ pump._% |
| A. | Single stage vertical |
| B. | Centrifugal |
| C. | Plunger |
| D. | Diffuser |
| Answer» B. Centrifugal | |
| 444. |
%_The velocity profile for turbulent flow through a closed conduit is_% |
| A. | Logarithmic |
| B. | Parabolic |
| C. | Hyperbolic |
| D. | Linear |
| Answer» B. Parabolic | |
| 445. |
%_Which of the following is used for pumping crude oil from oil well?_% |
| A. | Single stage centrifugal pump |
| B. | Gear pump |
| C. | Screw pump |
| D. | Duplex/triplex reciprocating pump |
| Answer» E. | |
| 446. |
%_Bernoulli's equation describes the_% |
| A. | Mechanical energy balance in potential flow |
| B. | Kinetic energy balance in laminar flow |
| C. | Mechanical energy balance in turbulent flow |
| D. | Mechanical energy balance in boundary layer |
| Answer» B. Kinetic energy balance in laminar flow | |
| 447. |
%_Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss?_% |
| A. | Flow nozzle |
| B. | Venturimeter |
| C. | Rotameter |
| D. | Orificemeter |
| Answer» C. Rotameter | |
| 448. |
%_Self-priming centrifugal pump can be used for_% |
| A. | Booster service |
| B. | Pumping liquid fertilisers (e.g. liquid NH‚ÇÉ) |
| C. | Pumping industrial wastes |
| D. | All of the above |
| Answer» E. | |
| 449. |
%_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. | |
| 450. |
%_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 | |