Chemical Engineering MCQs

Page No. 219

Medium viscosity lubricating oil can be most ideally pumped by a ______________ pump?


aVane


bPiston


cCentrifugal


dPlunger


View Answer Vane

Differential manometer measures the____________________?


aAtmospheric pressure


bSub-atmospheric pressure


cPressure difference between two points


dNone of these



The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost is P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet ?


aP, Q and R


bP and R


cR and S


dP, Rand S


View Answer P, Q and R

Velocity distribution for flow between two fixed parallel plates_________________?


aVaries parabolically across the section


bIs constant over the entire cross-section


cIs zero at the plates and increases linearly to the mid-plane


dNone of these



Upto what value of ‘Mach number’, a fluid may be considered as incompressible ?


a0.03


b0.3


c3


d10


View Answer 0.3

Where does the maximum stress occur in case of laminar flow of incompressible fluid in a closed conduit of diameter ‘d’ ?


aAt the centre


bAt d/4 from the wall


cAt the wall


dAt d/8 from the wall


View Answer At the wall

Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the _________________?


aTemperature


bPressure


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

The equivalent diameter for flow through a rectangular duct of width B and height H is___________________?


aHB/2 (H + B)


bHB/(H + B)


c2HB/(H + B)


d4HB/(H + B)


View Answer 2HB/(H + B)

A Rotameter works on the principle of _______________ pressure drop?


aConstant


bVariable


cBoth A. & B.


dNeither A. nor B.


View Answer Constant

The energy equation, E + (p/ρ) + (V2/2g) + gZ = constant (E = internal energy/mass), is applicable to___________________?


aPerfect gases only


bIsothermal flow of gases


cAdiabatic unsteady flow of gases


dAll compressible fluids



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