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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.
701. |
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is$? |
A. | 0.5 |
B. | 1 |
C. | 1.5 |
D. | 2 |
Answer» E. | |
702. |
Stoke's equation is valid in the Reynolds number range$? |
A. | 0.01 to 0.1 |
B. | 0.1 to 2 |
C. | 2 to 10 |
D. | 10 to 100 |
Answer» B. 0.1 to 2 | |
703. |
Prandtl mixing length is$? |
A. | Applicable to laminar flow problems |
B. | A universal constant |
C. | Zero at the pipe wall |
D. | None of these |
Answer» D. None of these | |
704. |
__________ flow means the flow of incompressible fluid with no shear.$? |
A. | Potential |
B. | Streamline |
C. | Creep |
D. | Boundary layer |
Answer» B. Streamline | |
705. |
Working of a __________ pump characterises mixed flow.$? |
A. | Turbine |
B. | Piston |
C. | Diaphragm |
D. | None of these |
Answer» B. Piston | |
706. |
Viscosity of water at 40°C lies in the range of$? |
A. | 1 x 10⁻³ to 2 x 10⁻³ kg/m.s |
B. | 0.5 x 10⁻³ to 1 x 10⁻³ kg/m.s |
C. | 1 to 2 kg/m.s |
D. | 0.5 to 1 kg/m.s |
Answer» C. 1 to 2 kg/m.s | |
707. |
Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number?$? |
A. | Fanning equation |
B. | Blake-Pllummer equation |
C. | Hagen-Poiseulle equation |
D. | Kozney-Karman equation |
Answer» C. Hagen-Poiseulle equation | |
708. |
Hydraulic __________ works on the principle of Pascal's law of transmission of fluid pressure.$? |
A. | Press |
B. | Turbine |
C. | Pump |
D. | Coupling |
Answer» B. Turbine | |
709. |
The pressure intensity is the same in all directions at a point in a fluid$? |
A. | Only when the fluid is frictionless |
B. | Only when the fluid is at rest having zero velocity |
C. | When there is no motion of one fluid layer relative to an adjacent layer |
D. | Regardless of the motion of one fluid layer relative to an adjacent layer |
Answer» D. Regardless of the motion of one fluid layer relative to an adjacent layer | |
710. |
What is the maximum theoretical suction lift (metres) of a reciprocating pump?$? |
A. | 5 |
B. | 10 |
C. | 50 |
D. | 100 |
Answer» C. 50 | |
711. |
As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re |
A. | Increases linearly with V |
B. | Decreases linearly with V |
C. | Decreases as V² |
D. | None of these |
Answer» B. Decreases linearly with V | |
712. |
A differential pressure cell is used for$? |
A. | Measuring small pressure difference in gases |
B. | Measuring small pressure difference in liquids |
C. | Remote recording of pressure difference |
D. | Measuring the difference of the impact & the static pressure |
Answer» D. Measuring the difference of the impact & the static pressure | |
713. |
Uniform fluid flow occurs, when the derivative of the flow variables satisfy the following condition.$? |
A. | ‚Äö√ √á/‚Äö√ √át = 0 |
B. | ‚Äö√ √á/‚Äö√ √át = constant |
C. | ‚Äö√ √á/‚Äö√ √ás = 0 |
D. | ‚Äö√ √á/‚Äö√ √át = constant |
Answer» D. ‚Äö√ √á/‚Äö√ √át = constant | |
714. |
Toothpaste is a$? |
A. | Bingham plastic |
B. | Pseudoplastic |
C. | Newtonion liquid |
D. | Dilatent |
Answer» E. | |
715. |
Capillary tube method of viscosity measurement is based on the$? |
A. | Hagen-Poiseulle's equation |
B. | Stoke's law |
C. | Navier-stokes equation |
D. | None of these |
Answer» B. Stoke's law | |
716. |
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is$? |
A. | 0 |
B. | 1 |
C. | < 1 |
D. | > 1 |
Answer» E. | |
717. |
What is the unit of kinematic viscosity in SI unit?$? |
A. | m²/sec |
B. | N/m² . sec |
C. | Kg . sec/m |
D. | None of these |
Answer» B. N/m¬¨‚â§ . sec | |
718. |
The Navier-Stokes equation deals with the law of conservation of$? |
A. | Mass |
B. | Energy |
C. | Both A and B |
D. | Momentum |
Answer» E. | |
719. |
Surge tanks are provided in high pressure water pipelines to$? |
A. | Store a definte quantity ofwater all the time |
B. | Reduce the water hammer |
C. | Facilitate easy dismantling of pipeline for cleaning and maintenance |
D. | None of these |
Answer» C. Facilitate easy dismantling of pipeline for cleaning and maintenance | |
720. |
The maximum delivery pressure of compressors can be upto __________ atmospheres.$? |
A. | 10 |
B. | 100 |
C. | 250 |
D. | 1000 |
Answer» E. | |
721. |
It is possible to integrate an automatic flow controller to a$? |
A. | Flow nozzle |
B. | Venturimeter |
C. | Rotameter |
D. | None of these |
Answer» D. None of these | |
722. |
At a constant speed of the centrifugal pump . it __________ the impeller diameter.$? |
A. | Capacity varies directly with |
B. | Head varies as the square of |
C. | Horsepower varies as the cube of |
D. | All of the above |
Answer» E. | |
723. |
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.$? |
A. | Piston |
B. | Gear |
C. | Positive displacement |
D. | Sump |
Answer» C. Positive displacement | |
724. |
The dimension of kinematic viscosity is$? |
A. | ML⁻²T⁻¹ |
B. | L²T⁻¹ |
C. | ML⁻²T⁻² |
D. | None of these |
Answer» C. ML‚Äö√Ö¬™¬¨‚â§T‚Äö√Ö¬™¬¨‚â§ | |
725. |
For the transfer of solution of thick slurry, the pump used is a __________ pump.$? |
A. | Reciprocating |
B. | Gear |
C. | Diaphragm |
D. | Centrifugal |
Answer» D. Centrifugal | |
726. |
With a constant diameter impeller of a centrifugal pump$? |
A. | Its capacity varies directly as the square of speed |
B. | Head varies as the square of speed |
C. | Horsepower input varies as the square of speed |
D. | Head varies as the speed |
Answer» C. Horsepower input varies as the square of speed | |
727. |
A special type of liquid transporting device is the diffuser pump, in which __________ are minimised.$? |
A. | Bearing losses |
B. | Disk friction |
C. | Shock losses |
D. | Cavitation |
Answer» D. Cavitation | |
728. |
For a particle settling in water at its terminal settling velocity, which of the following is true?$? |
A. | Buoyancy = weight + drag |
B. | Weight = buoyancy + drag |
C. | Drag = buoyancy + weight |
D. | Drag = weight |
Answer» C. Drag = buoyancy + weight | |
729. |
In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.$? |
A. | Lower than |
B. | Higher than |
C. | Equal to |
D. | None of these |
Answer» C. Equal to | |
730. |
For the manometer set up shown in the figure, the pressure difference PA - PB is given by$? |
A. | (ρH - ρair)gH |
B. | (ρH - ρL)gH |
C. | (ρH - ρL) gH + (ρL - ρair) . g(L - H) |
D. | (ρH - ρL) gL + (ρL - ρair)gH |
Answer» B. (≈ì√ÖH - ≈ì√ÖL)gH | |
731. |
The discharge through a rectangular weir varies as$? |
A. | H1/2 |
B. | H5/2 |
C. | H2/5 |
D. | H3/2 |
Answer» E. | |
732. |
In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.$? |
A. | Inverse |
B. | Square root |
C. | Second power |
D. | First power |
Answer» C. Second power | |
733. |
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.$? |
A. | 10 m |
B. | 11 m |
C. | 12 m |
D. | 20 m |
Answer» C. 12 m | |
734. |
Purpose of relief valve in a reciprocating pump is to$? |
A. | Protect the pump against developing excessive pressure |
B. | Facilitate unidirectional flow of liquid |
C. | Reduce the discharge pressure |
D. | Control the rate of discharge |
Answer» B. Facilitate unidirectional flow of liquid | |
735. |
Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m³, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is$? |
A. | 90 |
B. | 60 |
C. | 45 |
D. | 30 |
Answer» C. 45 | |
736. |
The distance between metacentre and __________ is called metacentric height.$? |
A. | Water surface |
B. | Centre of gravity |
C. | Centre of buoyancy |
D. | None of these |
Answer» C. Centre of buoyancy | |
737. |
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.$? |
A. | For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the venturimeter |
B. | Discharge of fluid through a venturimeter depends upon the gage difference irrespective of the orientation of venturimeter |
C. | Venturimeter occupies less space than an orificemeter |
D. | Venturimeter incurs less power loss compared to an equivalent orificemeter |
Answer» D. Venturimeter incurs less power loss compared to an equivalent orificemeter | |
738. |
While starting an axial flow pump, its delivery valve should be kept$? |
A. | Open |
B. | Closed |
C. | Either open or closed |
D. | None of these |
Answer» B. Closed | |
739. |
Which of the following is an undesirable property of a manometric liquid?$? |
A. | Non-sticky & non-corrosive nature |
B. | High vapour pressure |
C. | Low viscosity & surface tension |
D. | Low co-efficient of thermal expansion |
Answer» C. Low viscosity & surface tension | |
740. |
A fluid element has a velocity V = -y¬¨‚â§ . xi + 2yx¬¨‚â§ . j. The motion at (x, y) = (l/‚Äö√ √∂2, 1) is$? |
A. | Rotational and incompressible |
B. | Rotational and compressible |
C. | Irrotational and compressible |
D. | Irrotational and incompressible |
Answer» C. Irrotational and compressible | |
741. |
What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)?$? |
A. | 0.61 - 0.63 |
B. | 0.5 - 0.75 |
C. | 0.75 - 0.90 |
D. | 0.35 - 0.55 |
Answer» B. 0.5 - 0.75 | |
742. |
The head developed by a centrifugal pump is largely determined by the$? |
A. | Power of the pump |
B. | Nature of the liquid being pumped |
C. | Angle of the vanes and the speed of the tip of the impeller |
D. | Vapour pressure of the liquid |
Answer» D. Vapour pressure of the liquid | |
743. |
The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is$? |
A. | Hyperbolic |
B. | Parabolic |
C. | Linear |
D. | None of these |
Answer» C. Linear | |
744. |
For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary$? |
A. | Directly as square of gas density |
B. | Directly as gas density |
C. | Directly as square root of gas density |
D. | Inversely as gas density |
Answer» C. Directly as square root of gas density | |
745. |
Co-efficient of velocity is __________ the coefficient of discharge.$? |
A. | Less than |
B. | More than |
C. | Equal to |
D. | Not related to |
Answer» C. Equal to | |
746. |
Which of the following valves will incur maximum pressure drop for the same discharge of water?$? |
A. | Globe valve |
B. | Gate valve |
C. | Needle valve |
D. | Butterfly valve |
Answer» D. Butterfly valve | |
747. |
A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is$? |
A. | 25.61 kPa |
B. | 11.77 kPa |
C. | 14.86 kPa |
D. | 21.13 kPa |
Answer» C. 14.86 kPa | |
748. |
Friction factor for a hydraulically smooth pipe at NRe = 2100 is f‚ÇÅ. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will$? |
A. | Increase |
B. | Decrease |
C. | Remain unchanged |
D. | Increase or decrease depending on the pipe material |
Answer» B. Decrease | |
749. |
A pressure head of 320 metres of water in meters of CCl‚ÇÑ (sp.gr = 1.6) will be$? |
A. | 100 |
B. | 200 |
C. | 320 |
D. | 160 |
Answer» C. 320 | |
750. |
For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).$? |
A. | Increase |
B. | Decrease |
C. | Remain constant |
D. | Either A or B; depends on other factors |
Answer» B. Decrease | |