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.
| 751. |
Which of the following factors does not contribute to the pressure drop in a pipeline ?$? |
| A. | Velocity of fluid |
| B. | Size of pipe |
| C. | Length of pipe and number of bends |
| D. | None of these |
| Answer» E. | |
| 752. |
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is$? |
| A. | 1 |
| B. | 0 |
| C. | < 1 |
| D. | > 1 |
| Answer» D. > 1 | |
| 753. |
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water)$? |
| A. | 39.6y |
| B. | 48y |
| C. | 49.2y |
| D. | 58y |
| Answer» C. 49.2y | |
| 754. |
The terminal velocity of a particle moving through a fluid varies as dpn. The value of n is equal to __________ in Stoke's law regime.$? |
| A. | 1 |
| B. | 0.5 |
| C. | 2 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 755. |
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.$? |
| A. | 5 |
| B. | 50 |
| C. | 500 |
| D. | 1000 |
| Answer» C. 500 | |
| 756. |
A pitched-blade turbine draws __________ a straight blade turbine.$? |
| A. | Less power than |
| B. | More power than |
| C. | Same power as |
| D. | Data insufficient to predict |
| Answer» B. More power than | |
| 757. |
For water, when the pressure increases, the viscosity$? |
| A. | Also increases |
| B. | Decreases |
| C. | Remains constant |
| D. | First decreases, and then increases |
| Answer» E. | |
| 758. |
In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)$? |
| A. | Vavg |
| B. | 1.2 Vavg |
| C. | 1.5 Vavg |
| D. | 1.8 Vavg |
| Answer» C. 1.5 Vavg | |
| 759. |
The pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be$? |
| A. | Δp |
| B. | 2Δp |
| C. | Δp² |
| D. | Δp/2 |
| Answer» C. ≈í√Æp¬¨‚⧠| |
| 760. |
Specific speed of a centrifugal pump relates it with another pump having the$? |
| A. | Dynamic similarity |
| B. | Same efficiency |
| C. | Same speed |
| D. | Geometrical similarity |
| Answer» B. Same efficiency | |
| 761. |
With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss$? |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | Increases linearly |
| Answer» D. Increases linearly | |
| 762. |
The continuity equation$? |
| A. | Is independent of the compressibility of the fluid |
| B. | Is dependent upon the viscosity of the fluid |
| C. | Represents the conservation of mass |
| D. | None of these |
| Answer» D. None of these | |
| 763. |
The Prandtl mixing length is$? |
| A. | Zero at the pipe wall and is a universal constant |
| B. | Independent of radial distance from the pipe axis |
| C. | Independent of the shear stress |
| D. | Useful for computing laminar flow problems |
| Answer» E. | |
| 764. |
Applicability of Bernoulli's equation is limited to a/an __________ fluid, that does not exchange shaft work with the surroundings.$? |
| A. | Incompressible |
| B. | Non-viscous |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 765. |
The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is$? |
| A. | Q‚à ùN : H‚à ùN¬≤ : P‚à ùN¬≥ |
| B. | Q‚à ùN¬≤ : H‚à ùN¬≥ : P‚à ùN |
| C. | Q‚à ùN : H‚à ùN¬≥ : P‚à ùN¬≤ |
| D. | Q‚à ùN¬≥ : H‚à ùN : P‚à ùN¬≤ |
| Answer» B. Q‚Äö√ √πN¬¨‚⧠: H‚Äö√ √πN¬¨‚â• : P‚Äö√ √πN | |
| 766. |
Absolute viscosity of a fluid is a function of the __________ of the fluid.$? |
| A. | Motion |
| B. | Pressure & temperature |
| C. | Shearing stress |
| D. | Both B & C |
| Answer» E. | |
| 767. |
Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.$? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Eight |
| Answer» D. Eight | |
| 768. |
For an ideal fluid flow, Reynolds number is$? |
| A. | 2100 |
| B. | 100 |
| C. | 0 |
| D. | ‚à û |
| Answer» E. | |
| 769. |
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 | |
| 770. |
The maximum delivery pressure of compressors can be upto __________ atmospheres.? |
| A. | 10 |
| B. | 100 |
| C. | 250 |
| D. | 1000 |
| Answer» E. | |
| 771. |
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¬¨‚⧠. sec | |
| 772. |
The Navier-Stokes equation deals with the law of conservation of? |
| A. | Mass |
| B. | Energy |
| C. | Both A and B |
| D. | Momentum |
| Answer» E. | |
| 773. |
In case of supersonic flow of a fluid through pipeline, the 'Mach number' is? |
| A. | 0 |
| B. | 1 |
| C. | < 1 |
| D. | > 1 |
| Answer» E. | |
| 774. |
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 | |
| 775. |
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 | |
| 776. |
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. | |
| 777. |
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 | |
| 778. |
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¬™¬¨‚⧠| |
| 779. |
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 | |
| 780. |
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 | |
| 781. |
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 | |
| 782. |
A fluid element has a velocity V = -y¬≤ . xi + 2yx¬≤ . j. The motion at (x, y) = (l/‚à ö2, 1) is? |
| A. | Rotational and incompressible |
| B. | Rotational and compressible |
| C. | Irrotational and compressible |
| D. | Irrotational and incompressible |
| Answer» C. Irrotational and compressible | |
| 783. |
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 | |
| 784. |
__________ forces act on a particle moving through a stationary fluid.? |
| A. | Gravity |
| B. | Drag |
| C. | Buoyant |
| D. | All of the above |
| Answer» E. | |
| 785. |
Pick out the correct statement pertaining to venturimeter.? |
| A. | A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward |
| B. | The co-efficient of contraction of a venturimeter is always unity |
| C. | For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected |
| D. | None of these |
| Answer» E. | |
| 786. |
Which of the following is not an advantage of fluidisation from transfer operation point of view?? |
| A. | Intimate contact of the fluid with all parts of the solid particles |
| B. | Lower fluid pumping power requirement |
| C. | Minimisation of temperature variation |
| D. | Prevention of particle seggregation |
| Answer» C. Minimisation of temperature variation | |
| 787. |
Which of the following is a Newtonian fluid?? |
| A. | Rubber latex |
| B. | Sewage sludge |
| C. | Quicksand |
| D. | Non-colloidal solution |
| Answer» E. | |
| 788. |
Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about? |
| A. | 0.42 |
| B. | 0.62 |
| C. | 0.82 |
| D. | 0.98 |
| Answer» C. 0.82 | |
| 789. |
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 | |
| 790. |
Which of the following denotes the effect of compressibility in fluid flow?? |
| A. | Weber number |
| B. | Mach number |
| C. | Euler number |
| D. | Reynolds number |
| Answer» C. Euler number | |
| 791. |
For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by? |
| A. | ‚à Çu/‚à Çx = 0 |
| B. | ‚à Ç(œÅu)/‚à Çx = 0 |
| C. | ‚à Çu/‚à Çx = - ‚à ÇœÅ/‚à Çt |
| D. | ‚à ÇœÅ/‚à Çt = 0 |
| Answer» B. ‚Äö√ √á(≈ì√Öu)/‚Äö√ √áx = 0 | |
| 792. |
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 | |
| 793. |
What is the maximum theoretical suction lift (metres) of a reciprocating pump?? |
| A. | 5 |
| B. | 10 |
| C. | 50 |
| D. | 100 |
| Answer» C. 50 | |
| 794. |
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 | |
| 795. |
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 | |
| 796. |
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 | |
| 797. |
Working of a __________ pump characterises mixed flow.? |
| A. | Turbine |
| B. | Piston |
| C. | Diaphragm |
| D. | None of these |
| Answer» B. Piston | |
| 798. |
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 | |
| 799. |
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 | |
| 800. |
__________ flow means the flow of incompressible fluid with no shear.? |
| A. | Potential |
| B. | Streamline |
| C. | Creep |
| D. | Boundary layer |
| Answer» B. Streamline | |