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.
| 601. |
_For the same flow rate of a fluid, the pressure drop is the least for$? |
| A. | Venturimeter |
| B. | Orificemeter |
| C. | Flow-nozzle |
| D. | Δp is same for all |
| Answer» B. Orificemeter | |
| 602. |
_The __________ pressure is measured by a static tube.$? |
| A. | Dynamic |
| B. | Static |
| C. | Total |
| D. | None of these |
| Answer» C. Total | |
| 603. |
_In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?$? |
| A. | Rotational |
| B. | Unsteady |
| C. | Turbulent |
| D. | Non-uniform |
| Answer» E. | |
| 604. |
_Function of air vessel provided in a reciprocating pump is to$? |
| A. | Reduce discharge fluctuation |
| B. | Reduce the danger of cavitation |
| C. | Avoid the necessity of priming |
| D. | Increase the pump efficiency |
| Answer» B. Reduce the danger of cavitation | |
| 605. |
_The nominal size of a hose pipe is specified by its$? |
| A. | I.D. |
| B. | O.D. |
| C. | Thickness |
| D. | None of these |
| Answer» B. O.D. | |
| 606. |
_Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will$? |
| A. | Increase |
| B. | Decrease |
| C. | Remain unchanged |
| D. | Data insufficient to predict relative pressure drop |
| Answer» C. Remain unchanged | |
| 607. |
_In power law, ζ = A (du/dy)² + B , then the fluid is$? |
| A. | Newtonian |
| B. | Dilatant |
| C. | Thixotropic |
| D. | Rheopectic |
| Answer» B. Dilatant | |
| 608. |
_Delivery of insufficient quantity of liquid by a pump may be caused by$? |
| A. | Air leak in the inlet |
| B. | Low rpm |
| C. | Too high a lift |
| D. | All of the above |
| Answer» E. | |
| 609. |
_In frictional fluid flow, the quantity, P/ρ + V²/2gc + gz/gc, is$? |
| A. | Constant along a streamline |
| B. | Not constant along a streamline |
| C. | Increased in the direction of flow |
| D. | None of these |
| Answer» C. Increased in the direction of flow | |
| 610. |
_Schedule number of a pipe, which is a measure of its wall thickness, is given by$? |
| A. | 1000 P'/S |
| B. | 100 P'/S |
| C. | 1000 S/P' |
| D. | 10000 P'/S |
| Answer» B. 100 P'/S | |
| 611. |
_In Newton's law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is$? |
| A. | 0.44 |
| B. | 0.044 |
| C. | 4.4 |
| D. | 44 |
| Answer» B. 0.044 | |
| 612. |
_Laminar flow is characterised by the nonexistence of$? |
| A. | Pressure fluctuation |
| B. | Eddies |
| C. | Deviating velocities |
| D. | All of the above |
| Answer» E. | |
| 613. |
_High specific speed of a pump implies that, it is a/an __________ pump.$? |
| A. | Centrifugal |
| B. | Mixed flow |
| C. | Axial flow |
| D. | None of these |
| Answer» D. None of these | |
| 614. |
_Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the$? |
| A. | Back flow of fluid in the event of stoppage of pump |
| B. | Discharge pressure |
| C. | Flow of liquid during operation of the pump |
| D. | All of the above |
| Answer» B. Discharge pressure | |
| 615. |
_The friction factor is$? |
| A. | Always inversely proportional to the Reynolds number |
| B. | Not dimensionless |
| C. | Not dependent on the roughness of the pipe |
| D. | None of these |
| Answer» E. | |
| 616. |
_For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter)$? |
| A. | Vs/Dp² |
| B. | Vs²/Dp² |
| C. | Vs²/Dp³ |
| D. | Vs/Dp³ |
| Answer» B. Vs¬¨‚â§/Dp¬¨‚⧠| |
| 617. |
_Boundary layer thickness in laminar flow over a flat plate increases as(where, d = distance from the leading edge.)$? |
| A. | ‚à öd |
| B. | d1/3 |
| C. | d2 |
| D. | d2/3 |
| Answer» B. d1/3 | |
| 618. |
_Bernoulli's equation is not applicable, when the flow is$? |
| A. | Irrotational |
| B. | Incompressible |
| C. | Viscous |
| D. | All of the above |
| Answer» E. | |
| 619. |
_The simple pitot tube measures the __________ pressure.$? |
| A. | Static |
| B. | Dynamic |
| C. | Total |
| D. | None of these |
| Answer» D. None of these | |
| 620. |
_Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).$? |
| A. | H |
| B. | 12.6 H |
| C. | 13.6 H |
| D. | 14.6 H |
| Answer» C. 13.6 H | |
| 621. |
_In a fluidised bed reactor$? |
| A. | Temperature gradients are very high |
| B. | Temperature is more or less uniform |
| C. | Hot spots are formed |
| D. | Segregation of the solids occurs |
| Answer» C. Hot spots are formed | |
| 622. |
_A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is$? |
| A. | 20 m/sec |
| B. | 10 m/sec |
| C. | 5‚à ö2 m/sec |
| D. | 5 m/sec |
| Answer» C. 5‚Äö√ √∂2 m/sec | |
| 623. |
_Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is$? |
| A. | 24/NRe,p |
| B. | 16/NRe,p |
| C. | 64/NRe,p |
| D. | 48/NRe,p |
| Answer» B. 16/NRe,p | |
| 624. |
_The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number.$? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | May increase or decrease |
| Answer» C. Remains same | |
| 625. |
_Which of the following has the maximum compression ratio?$? |
| A. | Blower |
| B. | Compressor |
| C. | Vacuum pump |
| D. | Fan |
| Answer» D. Fan | |
| 626. |
_A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpmHead = 8 metresFlow = 1000 litres/minutes.If its speed is halved, the power consumed now will be __________ hp.$? |
| A. | 0.5 |
| B. | 2 |
| C. | 4 |
| D. | 1 |
| Answer» B. 2 | |
| 627. |
_The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is$? |
| A. | Parabolic |
| B. | Flat |
| C. | Flat near the wall and parabolic in the middle |
| D. | Parabolic near the wall and flat in the middle |
| Answer» E. | |
| 628. |
_Paper pulp is an example of __________ fluid.$? |
| A. | Dilatant |
| B. | Bingham plastic |
| C. | Newtonion |
| D. | Pseudoplastic |
| Answer» C. Newtonion | |
| 629. |
_The continuity equation in ideal fluid flow states that$? |
| A. | Net rate of inflow into any small volume must be zero |
| B. | Energy is not constant along a streamline |
| C. | Energy is constant along a streamline |
| D. | There exists a velocity potential |
| Answer» B. Energy is not constant along a streamline | |
| 630. |
_With increase in pump speed, its NPSH requirement$? |
| A. | Decreases |
| B. | Increases |
| C. | Remains unaltered |
| D. | Can either increase or decrease ; depends on other factors |
| Answer» C. Remains unaltered | |
| 631. |
_Foot valves provided in pumps are __________ valves.$? |
| A. | Relief |
| B. | Three/four way |
| C. | Pressure reducing |
| D. | Directional control |
| Answer» E. | |
| 632. |
_In the complete turbulence zone (in rough pipes), the$? |
| A. | Rough and smooth pipes have the same friction factor |
| B. | Laminar film covers the roughness projections |
| C. | Friction factor depends upon NRe only |
| D. | Friction factor is independent of the relative roughness |
| Answer» E. | |
| 633. |
_A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpmHead = 8 metresFlow = 1000 litres/minutes.If its speed is halved, the new discharge will be __________ litres/minute.$? |
| A. | 500 |
| B. | 200 |
| C. | 1000 |
| D. | 750 |
| Answer» B. 200 | |
| 634. |
_A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump$? |
| A. | Develops a lower head |
| B. | Capacity is reduced |
| C. | Requires more power |
| D. | All of the above |
| Answer» E. | |
| 635. |
_The ratio of maximum to average velocity in case of streamline flow between parallel plates is$? |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 2.5 |
| Answer» C. 2 | |
| 636. |
_Which of the following can be used for the direct measurement of volumetric flow rate of slurry?$? |
| A. | Venturimeter |
| B. | Orificemeter |
| C. | Rotameter |
| D. | Pitot tube |
| Answer» D. Pitot tube | |
| 637. |
_Bernoulli's equation accounts for the$? |
| A. | Various momentums |
| B. | Various masses |
| C. | Different forms of mechanical energy |
| D. | None of these |
| Answer» D. None of these | |
| 638. |
_Each term of the Bernoulli's equation written in the form, P/ρ + g/gc .Z + v²/2gc = constant , represents the total energy per unit$? |
| A. | Mass |
| B. | Volume |
| C. | Specific weight |
| D. | None of these |
| Answer» B. Volume | |
| 639. |
_With increase in the temperature, viscosity of a liquid$? |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | May increase or decrease; depends on the liquid |
| Answer» C. Remains constant | |
| 640. |
_Steady non-uniform flow is exemplified by flow through a/an$? |
| 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» E. | |
| 641. |
_Specific speed of a centrifugal pump depends upon the __________ head.$? |
| A. | Suction |
| B. | Delivery |
| C. | Manometric |
| D. | None of these |
| Answer» E. | |
| 642. |
_The ratio of width to depth for the most economical rectangular section in open channel flow is$? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 643. |
_A free jet of water of cross-sectional area 0.01m² and a velocity of 20 m/s strikes a plate and then flows in a plane parallel to the plate as shown in the figure below. The horizontal component of the force on the support is$? |
| A. | 200 N |
| B. | 400 N |
| C. | 2000 N |
| D. | 4000 N |
| Answer» E. | |
| 644. |
_Disc compensators are provided in large diameter fuel gas carrying pipelines to$? |
| A. | Keep the pipe in proper orientation |
| B. | Make the pipe joint leak-proof |
| C. | Account for contraction/expansion of pipe due to temperature changes of the surroundings |
| D. | Account for the pressure variation side the pipeline |
| Answer» D. Account for the pressure variation side the pipeline | |
| 645. |
_The percentage slip in a reciprocating pump set is given by the % of (where, Q‚ÇÅ = actual discharge Q‚ÇÇ = theoretical discharge)$? |
| A. | Q‚ÇÅ/Q‚ÇÇ |
| B. | Q‚ÇÇ/Q‚ÇÅ |
| C. | (Q‚ÇÇ - Q‚ÇÅ)/Q‚ÇÅ |
| D. | (Q‚ÇÇ - Q‚ÇÅ)/Q‚ÇÇ |
| Answer» E. | |
| 646. |
_Momentum correction factor used in fluid flow problems accounts for the$? |
| 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. | |
| 647. |
_For ideally incompressible fluid, the Mach number will be$? |
| A. | 1.5 |
| B. | 1 |
| C. | 0 |
| D. | 5 |
| Answer» C. 0 | |
| 648. |
_In hindered settling, the particles are$? |
| A. | Placed farther from the wall |
| B. | Not affected by other particles and the wall |
| C. | Near each other |
| D. | None of these |
| Answer» D. None of these | |
| 649. |
_To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump.$? |
| A. | Reciprocating |
| B. | Centrifugal |
| C. | Volute |
| D. | Rotary vacuum |
| Answer» B. Centrifugal | |
| 650. |
_In case of a pipe exit fitted with a nozzle, the$? |
| A. | Conversion of kinetic head to pressure head is facilitated |
| B. | Conversion of pressure head to kinetic head is facilitated |
| C. | Power transmitted through the nozzle is maximum, when the head lost due to friction in the pipe is equal to one third of the total supply head |
| D. | Both B and C |
| Answer» E. | |