0% 0 Fluid Mechanics for Chemical Quiz 14 1 / 50 Which of the following is not a dimension-less parameter ? Specific gravity Euler number None of these Fanning friction factor 2 / 50 Which of the following is a dimensionless parameter ? Angular velocity Kinematic viscosity None of these Specific weight 3 / 50 What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ?D? & length ?L? incurring a pressure drop ??p? with average velocity ?Vavg? ? 8 Vavg/D D ?p/8L 4 Vavg/D D ?p/4L 4 / 50 Which of the following can be used for the direct measurement of volumetric flow rate of slurry ? Venturimeter Rotameter Pitot tube Orificemeter 5 / 50 Which of the following is not concerned with the fluid-particle interaction ? Drag co-efficient Weber number Froude number Galileo number 6 / 50 Which is the most efficient and best for measuring very small flow rate of gases ? Flow nozzle Orificemeter Venturimeter Rotameter 7 / 50 When the pipe Reynold?s number is 6000, the flow is generally_____? Laminar Turbulent Transition Viscous 8 / 50 What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ? 0.5 1 2 1.5 9 / 50 What is the speed of sound (m/sec) in ordinary water ? 1500 3000 330 1000 10 / 50 Which of the following is dimensionless ? None of these Specific volume Angular velocity Fanning friction factor 11 / 50 Which of the following has the minimum compressibility ? Oxygen at room temperature Water at room temperature Nitrogen at room temperature Air at room temperature 12 / 50 Which of the fluid forces are not considered in the Reynold?s equation of flow ? Turbulent forces Compressibility forces Pressure forces Viscous forces 13 / 50 Which of the following is the most common pump for pumping either raw sewage or sludge ? Gear pump Reciprocating pump Electromagnetic pump Centrifugal pump 14 / 50 Which of the following exemplifies a three dimensional fluid flow ? Fluid flow at the inlet to a nozzle None of these Viscous fluid flow between converging plates Fluid flow between parallel plates 15 / 50 Which of the following can be used to create a flow of gas, where no significant compression is required ? Blower Axial flow compressor Centrifugal compressor Reciprocating compressor 16 / 50 Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (?0) with age/time (t) (where, ? = roughness of the surface after time?t?. ? = a co-efficient to be experimentally determined) ? ? = ?0 + ?.t ? = ?0 + ?.t3 ? = ?0 + ?.t2 ? = ?0 + ?.t4 17 / 50 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) ? 1 2 1.5 0.5 18 / 50 Which is not a variable head meter __________? Rotameter Pitot tube Venturimeter None of these 19 / 50 Which of the following flow measuring devices is an area meter ? Rotameter Venturimeter Anemometer Orificemeter 20 / 50 When the momentum of one fluid is used for moving another fluid, such a device is called a/an_______? Blower Acid egg None of these Jet pump 21 / 50 Which of the following is a Newtonian fluid ? Sewage sludge Quicksand Rubber latex Non-colloidal solution 22 / 50 Which law is followed by the velocity distribution in the turbulent boundary layer ? Parabolic law None of these Linear law Logarithmic law 23 / 50 What is the value of Fanning friction factor f ? for smooth pipe at NRe = 106 approximately ? 0.1 0.003 0.3 0.01 24 / 50 Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number ? Blake-Plummer equation Fanning equation Hagen-Poiseuille equation Kozeny-Carman equation 25 / 50 Which of the following is not dimension-less ? Pressure co-efficient None of these Froude number Kinematic viscosity 26 / 50 Which law/principle of solid mechanics is similar/equivalent to Newton?s law of viscosity in fluid mechanics ? Hooke?s law Archimedes principle Newton?s second law of motion Newton?s third law of motion 27 / 50 Where does the maximum stress occur in case of laminar flow of incompressible fluid in a closed conduit of diameter ?d? ? At d/4 from the wall At d/8 from the wall At the wall At the centre 28 / 50 Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) ? D = 1840 H/N D = 1840 N/H0.5 D = 1840 H0.5/N H = 1840 D0.5/N 29 / 50 Which of the following fluid forces are not considered in the Navier-Stoke?s equation ? Viscous forces Turbulent forces Gravity forces Pressure forces 30 / 50 What type of motion the fluid element undergoes, when it changes from one position to another position, such that the angle between the two sides changes ? Linear deformation Rotation Translation Angular deformation 31 / 50 Which of the following factors does not contribute to the pressure drop in a pipeline ? Length of pipe and number of bends Size of pipe Velocity of fluid None of these 32 / 50 What is the ratio of fluid carrying capacity of two pipes having diameters d1 and d2 respectively ? (d1/d2)0.8 d1/d2 (d1/d2)2 (d1/d2)0.5 33 / 50 When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the ________ bed? Teeter Sluggish Boiling Spouted 34 / 50 Which of the following conditions must be satisfied for lift force to be developed ? The main stream velocity must approach the velocity of sound in that fluid medium The body should be bluff body The body should be stream lined Circulation around the body is essentially required 35 / 50 What is the unit of kinematic viscosity in SI unit ? Kg. sec/m None of these N/m2. sec M2/sec 36 / 50 When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an________? Injector Airlift Blower Ejector 37 / 50 Which of the following is the ?Blasius equation?, relating friction factor to the Reynolds number ? Both ?a? and ?b? f = 0.079.NRe-0.25 None of these f-0.5 = 4.07 loge (NRef)-0.6 38 / 50 Which of the following facilitates close control of flow of fluids ? Gate valve Check valve Butterfly valve Globe valve 39 / 50 When the water is warm, the height to which it can be lifted by a pump__________? Decreases due to increased frictional resistance Increases due to increased vapour pressure Decreases due to reduced viscosity Decreases due to reduced vapour pressure 40 / 50 Which of the following is most prone to pulsating discharge flow ? Centrifugal pump Reciprocating pump Gear pump Axial flow pump 41 / 50 Which of the following is not a dimension-less parameter ? Froude number Pressure-co-efficient Kinematic viscosity Weber number 42 / 50 Which of the following has the maximum compression ratio ? Fan Compressor Vacuum pump Blower 43 / 50 When a fluid flows over a solid surface, the_____? Velocity is uniform at any cross-section Velocity is not zero at the solid surface Resistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves Velocity gradient is zero at the solid surface 44 / 50 Which of the following is an undesirable property of a manometric liquid ? Low viscosity & surface tension High vapour pressure Non-sticky & non-corrosive nature Low co-efficient of thermal expansion 45 / 50 Which of the following is not an advantage of fluidisation from transfer operation point of view ? Lower fluid pumping power requirement Minimisation of temperature variation Intimate contact of the fluid with all parts of the solid particles Prevention of particle segregation 46 / 50 What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ? 1 0.5 0.67 2 47 / 50 Which of the following equations is valid for laminar flow of a fluid through packed bed ? Fanning equation Hagen-Poiseuille equation Kozeny ? Karman equation Blake-Plummer equation 48 / 50 What is the value of co-efficient of discharge for square edged circular orifice (for ? = 0.3 to 0.5) ? 0.5 ? 0.75 0.61 ? 0.63 0.35 ? 0.55 0.75 ? 0.90 49 / 50 Which of the following denotes the effect of compressibility in fluid flow ? Reynolds number Weber number Mach number Euler number 50 / 50 Which of the following assumptions enables the Euler?s equation of motion to be integrated ? The fluid is non-viscous The flow is rotational and incompressible The continuity equation is satisfied The fluid is incompressible Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevFluid Mechanics for Chemical Quiz 13 Fluid Mechanics for Chemical Quiz 15Next
