0% 0 Fluid Mechanics for Chemical Quiz 4 1 / 50 Experimental study of laminar fluid flow through a circular tube was conducted by______? Blake-Plummer Hagen and Poiseuille Reynolds Pascal 2 / 50 Drag co-efficient in hindered settling is ______ that in free settling? Equal to Less than Not necessarily greater than Always greater than 3 / 50 Fluid flow in a/an _______ is an example of pressure flow? Partially filled pipeline River Pipe Open channel 4 / 50 Draining of shallow pits or sump is done by a sump pump, which is a _______ pump? Centrifugal Plunger Single stage vertical Diffuser 5 / 50 Foot valves are provided in the suction line of a centrifugal pump to ______? Control the liquid discharge Avoid priming, every time we start the pump Minimise the fluctuation in discharge Remove the contaminant present in the liquid 6 / 50 Fanning equation is given by (?P/?) = 4f (L/D) (v2/2gc). It is applicable to ______ region flow? Turbulent Both B. and C. Laminar Transition 7 / 50 f = 16/NRe, is valid for___________? Steady flow Turbulent flow Laminar flow through an open channel None of these 8 / 50 For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary________? Inversely as gas density Directly as square of gas density Directly as square root of gas density Directly as gas density 9 / 50 Existence of boundary layer in fluid flow is because of the__________? Fluid viscosity Fluid density Gravity forces Surface tension 10 / 50 Drag co-efficient CD, in Stoke?s law range is given by_________? CD = 24/Re.p CD = 0.079/Re 0.25.p CD = 16/Re.p CD = 18.4/Re.p 11 / 50 During ageing of fluid carrying pipes, the___________? Pipe becomes smoother with use Friction factor increases linearly with time Absolute roughness decreases with time Absolute roughness increases linearly with time 12 / 50 Foot valves provided in pumps are _____ valves? Pressure reducing Relief Three/four way Directional control 13 / 50 Foot valve provided in the pump is a _______ valve? Direction control Relief Pressure reduction Back pressure 14 / 50 Fluid flow through a packed bed is represented by the _______ equation? Ergun?s Hagen-Poiseuille?s None of these Fanning?s 15 / 50 Fanning friction factor for laminar flow of fluid in a circular pipe is______? Not a function of the roughness of pipe wall Neither A. nor B. Inversely proportional to Reynolds number Both A. & B. 16 / 50 Drag force on the float of a Rotameter is (where Q = flow rate of the)___________? ? Q Constant ? Q2 ? ?Q 17 / 50 Fluid flow at increasing rate through a diverging pipe is an example of _______ flow? Steady non-uniform Steady uniform Non-steady non-uniform Non-steady uniform 18 / 50 For an unstable equilibrium of a floating body (where, M = metacentre.) ? M is below G M & G coincide M is above G None of these 19 / 50 Drag force acting on a body does not depend upon the______? Projected area of the body Density of the body Density of the fluid Velocity of the body 20 / 50 For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the_____? Elevation along vertical direction Radial distance linearly Inverse of the radial distance Square of the radial distance 21 / 50 Fanning friction factor equation applies to the ______ fluid flow? Neither A. nor B. Compressible Both A. and B. Non-isothermal condition of 22 / 50 For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)? Decrease Either A. or B.; depends on other factors Remain constant Increase 23 / 50 For flow of fluids through packed bed, the superficial velocity is__________? More than the average velocity through channels Same as the average velocity through channels Less than the average velocity through channels Dependent on the pressure drop across the bed 24 / 50 Drag is the force component exerted on an immersed object, ? The component being normal to the flow direction Passing the centroid of the body at 60?to the direction of motion None of these The component being parallel to the flow direction 25 / 50 For flow past a flat plate, if ?x? is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to_________? 1/x 1/?x ?x x 26 / 50 Efficiency of power transmission (?) through a circular pipe is given by (ht ? hf)/ht, which has a maximum value of ______ percent? 33:03:00 88.8 66.6 50 27 / 50 Discharge from a 24 inch pipe of water at 10 ft/sec will be ______ ft3/sec? 7.65 32.36 48.22 125.6 28 / 50 Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke?s law range is__________? 64/NRe,P 24/NRe,P 16/NRe,P 48/NRe,P 29 / 50 For a given Reynolds number, in a hydraulically smooth pipe, further smoothening _____ the friction factor? None of these Decreases Brings about no further reduction of Increases 30 / 50 Erosion and pits formation on the impeller of a centrifugal pump may be due to_________? Cavitation Its operation with delivery valve closed for considerable time after starting the pump Off centering of pump with motor Low speed of impeller 31 / 50 For a reciprocating pump, the indicator diagram is the graph between the_________? Discharge and overall efficiency None of these Volume swept by piston for one complete revolution and the pressure in the cylinder Angle swept by the crank pin at any instant and the discharge 32 / 50 Enamels and paints are generally ________ fluid? Pseudo-plastic Dilatant Rheopectic Thixotropic 33 / 50 Equivalent length of a pipe fitting is______? Independent of Reynolds number Dependent on the length of the pipe Dependent on Reynolds number None of these 34 / 50 Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a __________? Rotameter Pitot tube Manometer None of these 35 / 50 For a given fluid flow rate, which of the following incurs maximum head loss ? All of them incur the same head loss Venturimeter Orificemeter Flow nozzle 36 / 50 For an ideal fluid flow, Reynolds number is_____? ? 2100 100 0 37 / 50 Fanning friction factor is equal to (where, fB = Blasius friction factor) ? fB/4 fB/2 2fB 4fB 38 / 50 Discharge in laminar flow through a pipe varies_________? Inversely as the pressure drop As the square of the radius As the square of the diameter Inversely as the viscosity 39 / 50 Drag co-efficient for flow past immersed body is the ratio of ______ to the product of velocity head and density? Shear stress Average drag per unit projected area None of these Shear force 40 / 50 Fluidised beds are formed, when the___________? Pressure forces equal gravity forces Fluid friction is zero Gravity force is less than the fluid friction Sum of the fluid friction and pressure forces is equal and opposite to gravity forces 41 / 50 Euler?s equation of motion states, that at every point, the__________? None of these Fluid momentum is constant Rate of mass outflow is equal to the rate of mass inflow Force per unit mass equals acceleration 42 / 50 Flow measurement in an open channel is done by a/an _________? Venturimeter Orificemeter Rotameter Weir 43 / 50 Euler?s equation of motion is a statement expressing______? Conservation of mass Newton?s first law of motion Conservation of energy Newton?s second law of motion 44 / 50 For a particle settling in water at its terminal settling velocity, which of the following is true ? Drag = weight Drag = buoyancy + weight Weight = buoyancy + drag Buoyancy = weight + drag 45 / 50 Each term of the Bernoulli?s equation written in the form, (p/?) + (g/gc). Z + (v2/2gc) = constant, represents the total energy per unit _________? Mass Volume None of these Specific weight 46 / 50 For a stable equilibrium of a submerged body (where, G and B are centres of gravity & buoyancy respectively) ? G is above B None of these B is above G B & G coincide 47 / 50 Each term in Bernoulli?s equation represents the ______ of the fluid? Force per unit mass Energy per unit weight None of these Energy per unit mass 48 / 50 Fluid resistance to shear depends upon its________? Rate of transfer of molecular momentum Neither A. nor B. Both A. and B. Cohesion 49 / 50 Drag is defined as the force exerted by the_____? Solid on the fluid None of these Fluid on the solid in a direction opposite to flow Fluid on the solid in the direction of flow 50 / 50 For an incompressible fluid, the bulk modulus of elasticity is______? ? N/m2 0 N/m 1 N 5 kg/m3 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 3 Fluid Mechanics for Chemical Quiz 5Next
