Chemical Engineering MCQs

Page No. 168

It is possible to integrate an automatic flow controller to a________________?


aFlow nozzle


bVenturimeter


cRotameter


dNone of these


View Answer Rotameter

The unit of bulk modulus of elasticity for a liquid in S.I. unit is____________________?


aN


bN/m


cN/m2


dN/m3


View Answer N/m2

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________________?


a√x


b1/√x


cx


d1/x


View Answer √x

Path followed by water jet issuing from the bottom of a water tank will be a__________________?


aParabola (vertex being at the opening)


bHyperbola


cHorizontal straight line


dZig-zag path (which is geometrically undefined)



Location of vena-contracta in an orificemeter does not depend upon the________________?


aType of orifice


bDensity, viscosity & compressibility of the fluid


cRatio of pipe diameter to orifice diameter


dPipe roughness


View Answer Type of orifice

The maximum head that can be developed by a single impeller is _____________ ft?


a25


b100


c250-300


d1000


View Answer 250-300

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


a2


b8


c12


d20


View Answer 2

Drag co-efficient in hindered settling is _____________ that in free settling?


aLess than


bEqual to


cNot necessarily greater than


dAlways greater than


View Answer Always greater than

Working of a _______________ pump characterises mixed flow?


aTurbine


bPiston


cDiaphragm


dNone of these


View Answer Turbine

Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump ?


aIncreasing the impeller speed and the volute area


bIncreasing the number of vanes in the impeller


cMounting of two or more impellers in series on a single shaft


dEither of A., B. or C.



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