Fluid Mechanics for Chemical Quiz 6

If the discharge of a centrifugal pump is throttled, then its suction lift_________?

In hindered settling, the particles are___________?

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes________?

In case of a centrifugal pump, the theoretical head developed is dependent on the ______ the impeller?

If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is__________?

If in a flow field, between any two points, then the flow must be_____?

Identification of pipelines carrying different liquids and gases is done by the _____ of the pipe?

In an incompressible fluid, the density is______?

In a free vortex, the_______?

In laminar flow through a round tube, the discharge varies ________?

In case of end to end connection of two or more pipes in series, the _______ each pipe?

In case of a pipe exit fitted with a nozzle, the______?

In fluid flow, the boundary layer separation cannot occur_____?

In case of a _____ the energy of flow is considerably decreased downstream of the machine?

In case of Couette flow, the fluid flow is between two large flat parallel plates with_____?

In a fully turbulent flow (Re > 105) in a pipe of diameter ?d?, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is________?

In area meter (e.g., Rotameter), with increase in the fluid flow rate, the_____?

If Blasius or Darcy friction factor is ?f1? then the Fanning friction factor is equal to______?

In a/an ______, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure?

In case of laminar flow of fluid through a circular pipe, the___________?

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas) ?

In case of centrifugal fan or blower, the gas capacity varies as ___________?

In a stabilised soap bubble, pressure inside it compared to external pressure is_________?

In case of Venturimeter, friction losses are about ______ percent of maximum velocity head?

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of_____?

In fluid flow, the stagnation point is defined as a point, where the ______ is zero?

In an incompressible flow of fluid, the fluid _________?

In magnetic flow meters, voltage generation is_________?

If the head over the triangular notch is doubled, the discharge will increase by _______ times?

In frictional fluid flow, the quantity, (P/?) + (V2/2gc) + gz/gc) is_____?

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature) ?

In case of turbulent flow of fluid through a circular pipe, the ___________?

In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure _______ the vapor pressure of the liquid at the suction temperature?

In case of a Rotameter, the density of the float material is ______ that of the liquid it replaces?

In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the ______ efficiency?

If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor). ?

In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

In case of supersonic flow of a fluid through pipeline, the ?Mach number? is___________?

In fluid flow, cavitation is caused, if the______?

In deriving Bernoulli?s equation, fluid is assumed to be_________?

If ?x? is the depth of flow in an open channel of large width, then the hydraulic radius is equal to_________?

In isotropic turbulence, the ______ are equal to each other?

In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is_____?

In a fluidised bed reactor_____?

In a dry packed bed, the pressure drop will be changed by increasing the flow rate as___________?

Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of__________?

I.D. of 1/4? schedule 40 pipe is 0.364?. I.D. of a 1/2? schedule 40 pipe would be _______ inch?

In continuous fluidisation__________?

If more than two branches of pipes are to be connected at the same point, then use a/an__________?