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.
| 501. |
_ What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?$? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 502. |
_ Ratio of pressure and inertia force gives __________ number.$? |
| A. | Weber |
| B. | Mach |
| C. | Euler |
| D. | Froude |
| Answer» D. Froude | |
| 503. |
_ The main factor on which the behaviour of a mass of fluidised solid depends mainly is the$? |
| A. | Fluid characteristics |
| B. | Particle size |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 504. |
_ What is the ratio of fluid carrying capacity of two pipes having diameters d‚ÇÅ and d‚ÇÇ respectively?$? |
| A. | (d‚ÇÅ/d‚ÇÇ)0.8 |
| B. | (d‚ÇÅ/d‚ÇÇ)0.5 |
| C. | (d‚ÇÅ/d‚ÇÇ) |
| D. | (d‚ÇÅ/d‚ÇÇ)2 |
| Answer» C. (d‚Äö√á√Ö/d‚Äö√á√á) | |
| 505. |
_ Reynolds number is the ratio of$? |
| A. | Viscous forces to gravity forces |
| B. | Inertial forces to viscous forces |
| C. | Viscous forces to inertial forces |
| D. | Inertial forces to gravity forces |
| Answer» C. Viscous forces to inertial forces | |
| 506. |
_ Newton's law of viscosity relates the$? |
| 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 | |
| 507. |
_ __________ pumps are a group of vacuum pumps.$? |
| A. | Hyter |
| B. | Sump |
| C. | Mono |
| D. | Submerged |
| Answer» B. Sump | |
| 508. |
_ The discharge through a V-notch weir varies as$? |
| A. | H3/2 |
| B. | H1/2 |
| C. | H5/2 |
| D. | H2/3 |
| Answer» D. H2/3 | |
| 509. |
_ In case of a __________ the energy of flow is considerably decreased downstream of the machine.$? |
| A. | Blower |
| B. | Turbine |
| C. | Centrifugal pump |
| D. | Centrifugal fan |
| Answer» C. Centrifugal pump | |
| 510. |
_ Each term in Bernaulli's equation represents the __________ of the fluid.$? |
| A. | Energy per unit mass |
| B. | Energy per unit weight |
| C. | Force per unit mass |
| D. | None of these |
| Answer» C. Force per unit mass | |
| 511. |
_ 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)$? |
| A. | x |
| B. | πx |
| C. | 2x |
| D. | x/2 |
| Answer» B. ≈ì√Ñx | |
| 512. |
_ With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)$? |
| A. | Decreases |
| B. | Increases linearly |
| C. | Increases exponentially |
| D. | Remains constant |
| Answer» C. Increases exponentially | |
| 513. |
_ 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.$? |
| A. | I, II, III |
| B. | II, III, V |
| C. | I, II, V |
| D. | II, IV, V |
| Answer» C. I, II, V | |
| 514. |
_ The ratio of inertial forces to gravity forces is called the __________ number.$? |
| A. | Mach |
| B. | Froude |
| C. | Euler |
| D. | Weber |
| Answer» C. Euler | |
| 515. |
_ Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer.$? |
| A. | U-tube water |
| B. | U-tube mercury |
| C. | Inclined tube mercury |
| D. | Inclined tube water |
| Answer» E. | |
| 516. |
_ The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation$? |
| A. | dq/dx = K |
| B. | dq/dx = K.q |
| C. | dq/dx = K/q |
| D. | dq/dx = Kq² |
| Answer» B. dq/dx = K.q | |
| 517. |
_ Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.$? |
| A. | Less than |
| B. | More than |
| C. | Same as |
| D. | None of these |
| Answer» C. Same as | |
| 518. |
_ Which of the following is used for very accurate measurement of flow of gas at low velocity?$? |
| A. | Pitot tube |
| B. | Rotameter |
| C. | Segmental orificemeter |
| D. | Hot wire annemometer |
| Answer» E. | |
| 519. |
_ 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.$? |
| A. | 4πg/3 |
| B. | 0.01πgH/4 |
| C. | 0.01πgH/8 |
| D. | 0.04πgH/3 |
| Answer» B. 0.01≈ì√ÑgH/4 | |
| 520. |
_ Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?$? |
| A. | Increasing the impeller speed and the volute area |
| B. | Increasing the number of vanes in the impeller |
| C. | Mounting of two or more impellers in series on a single shaft |
| D. | Either of A, B or C |
| Answer» D. Either of A, B or C | |
| 521. |
_ The boundary layer is that part of a moving fluid, in which the fluid velocity is$? |
| A. | Affected by the fluid flow pressure |
| B. | Constant |
| C. | Affected by the presence of a solid boundary |
| D. | All of the above |
| Answer» D. All of the above | |
| 522. |
_ Isotropic turbulence occurs$? |
| A. | Where there is no velocity gradient |
| B. | At higher temperatures |
| C. | Only in Newtonion fluids |
| D. | None of these |
| Answer» B. At higher temperatures | |
| 523. |
_ A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.$? |
| A. | Circular |
| B. | Rectangular |
| C. | Triangular |
| D. | Trapezoidal |
| Answer» B. Rectangular | |
| 524. |
_ Capacity of a hydraulic accumulator is defined in terms of maximum$? |
| A. | Amount of energy stored |
| B. | Flow rate through accumulator |
| C. | Rate of falling of ram |
| D. | Volume available in the cylinder |
| Answer» B. Flow rate through accumulator | |
| 525. |
_ The unit of dynamic viscosity in SI unit is$? |
| A. | kg/m . sec |
| B. | N/m² |
| C. | m² /sec |
| D. | m/N. sec |
| Answer» B. N/m¬¨‚⧠| |
| 526. |
_ Medium viscosity lubricating oil can be most ideally pumped by a __________ pump.$? |
| A. | Vane |
| B. | Piston |
| C. | Centrifugal |
| D. | Plunger |
| Answer» B. Piston | |
| 527. |
_ __________ is an example of axial flow impeller.$? |
| A. | Paddle |
| B. | Turbine |
| C. | Propeller |
| D. | All of the above |
| Answer» D. All of the above | |
| 528. |
_ A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp.$? |
| A. | 1 |
| B. | 10/55 |
| C. | 5.5 |
| D. | 1/55 |
| Answer» B. 10/55 | |
| 529. |
_ The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.$? |
| A. | P, Q and R |
| B. | P and R |
| C. | R and S |
| D. | P, Rand S |
| Answer» B. P and R | |
| 530. |
_ A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double$? |
| A. | Head |
| B. | Discharge |
| C. | Efficiency |
| D. | None of these |
| Answer» C. Efficiency | |
| 531. |
_ The __________ is measured by a piezometric opening.$? |
| A. | Dynamic pressure |
| B. | Static pressure |
| C. | Total pressure |
| D. | Point velocity |
| Answer» D. Point velocity | |
| 532. |
_ A centrifugal pump is called a turbine pump, if it is having a$? |
| A. | Turbine type impeller |
| B. | Vaned diffusion casing |
| C. | Rotating vaned volute |
| D. | None of these |
| Answer» C. Rotating vaned volute | |
| 533. |
_ For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe , plot is$? |
| A. | 1 |
| B. | -1 |
| C. | 0.5 |
| D. | -0.5 |
| Answer» C. 0.5 | |
| 534. |
_ Euler's equation of motion states, that at every point, the$? |
| A. | Fluid momentum is constant |
| B. | Force per unit mass equals acceleration |
| C. | Rate of mass outflow is equal to the rate of mass inflow |
| D. | None of these |
| Answer» C. Rate of mass outflow is equal to the rate of mass inflow | |
| 535. |
_ 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.$? |
| A. | 40 |
| B. | 34 |
| C. | 8 |
| D. | 37 |
| Answer» D. 37 | |
| 536. |
_ In case of coutte flow, the fluid flow is between two large flat parallel plates with$? |
| A. | Top plate moving and the bottom plate fixed |
| B. | Bottom plate moving and the top plate fixed |
| C. | Both the plates fixed |
| D. | Both the plates moving |
| Answer» B. Bottom plate moving and the top plate fixed | |
| 537. |
_ Gradually varied flow in open channel is a/an __________ flow.$? |
| A. | Steady uniform |
| B. | Steady non-uniform |
| C. | Unsteady uniform |
| D. | Unsteady non-uniform |
| Answer» C. Unsteady uniform | |
| 538. |
_ Gradually varying fluid flow is an example of __________ flow.$? |
| A. | Non-steady uniform |
| B. | Non-steady non-uniform |
| C. | Steady uniform |
| D. | Steady non-uniform |
| Answer» B. Non-steady non-uniform | |
| 539. |
_ Slugging occurs in a fluidised bed, if the bed is$? |
| A. | Narrow |
| B. | Deep |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 540. |
_ The fluid property which matters for fall-ing rain drops to acquire spherical shape is its$? |
| A. | Pressure |
| B. | Height of descend |
| C. | Viscosity |
| D. | Surface tension |
| Answer» E. | |
| 541. |
_ For a reciprocating pump, the indicator diagram is the graph between the$? |
| A. | Discharge and overall efficiency |
| B. | Volume swept by piston for one complete revolution and the pressure in the cylinder |
| C. | Angle swept by the crank pin at any instant and the discharge |
| D. | None of these |
| Answer» C. Angle swept by the crank pin at any instant and the discharge | |
| 542. |
_ A perfect gas$? |
| A. | Does not satisfy PV = nRT |
| B. | Is incompressible and has zero viscosity |
| C. | Has constant specific heat |
| D. | Can't develop shear stresses |
| Answer» D. Can't develop shear stresses | |
| 543. |
_ The specific speed of a pump is defined as the speed of a unit of such a size, that it$? |
| A. | Delivers unit discharge at unit head |
| B. | Requires unit power for unit head |
| C. | Delivers unit discharge at unit power |
| D. | None of these |
| Answer» B. Requires unit power for unit head | |
| 544. |
_ Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?$? |
| A. | Head & discharge |
| B. | Length & discharge |
| C. | Length & diameter |
| D. | Friction factor & diameter |
| Answer» B. Length & discharge | |
| 545. |
_ What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta?$? |
| A. | 0.64 |
| B. | 1.65 |
| C. | 0.32 |
| D. | 0.94 |
| Answer» B. 1.65 | |
| 546. |
_ A globe valve is the most suitable for applications, in which$? |
| A. | Fluid flow control is required |
| B. | Fluid contains dispersed solid particles |
| C. | Valve is required to be either fully open or fully closed |
| D. | One way flow is required |
| Answer» B. Fluid contains dispersed solid particles | |
| 547. |
_ Mass velocity is independent of temperature & pressure, when the flow is$? |
| A. | Unsteady through unchanged cross-section |
| B. | Steady through changing cross-section |
| C. | Steady and the cross-section is unchanged |
| D. | Unsteady and the cross-section is changed |
| Answer» D. Unsteady and the cross-section is changed | |
| 548. |
_ Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will$? |
| A. | Increase |
| B. | Decrease |
| C. | Remain same |
| D. | Be quadrupled |
| Answer» B. Decrease | |
| 549. |
_ A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ₀ = 10 KPa, is shared between flat parallel plates separated by a distance of 10⁻³ m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is$? |
| A. | 10 KPa |
| B. | 20 KPa |
| C. | 30 KPa |
| D. | 40 KPa |
| Answer» C. 30 KPa | |
| 550. |
_ A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.$? |
| A. | Sump |
| B. | Volute |
| C. | Vacuum |
| D. | Submerged |
| Answer» D. Submerged | |