Chemical Engineering MCQs

Page No. 211

A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, η0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is________________?


a10 KPa


b20 KPa


c30 KPa


d40 KPa


View Answer 20 KPa

The Prandtl Pitot tube measures the__________________?


aVelocity at a point in the flow


bPressure at a point


cAverage flow velocity


dPressure difference in pipe flow



Dimension of absolute viscosity is_________________?


aML-1T-1


bMLT-1


cML-1T


dMLT


View Answer ML-1T-1

Purpose of hydraulic accumulator is to_______________?


aEnsure intermittent supply of hydraulic pressure


bIncrease the pressure and store/ accumulate it


cAccumulate pressure to increase force


dGenerate high pressure to operate hydraulic machines like cranes, lifts, presses etc



All pipes of a particular nominal size have the same_________________?


aInside diameter


bOutside diameter


cThickness


dNone of these


View Answer Outside diameter

What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?


a0.64


b1.65


c0.32


d0.94


View Answer 0.64

For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) ?


aVs/Dp2


bVs2/Dp2


cVs2/Dp3


dVs/Dp3


View Answer Vs/Dp2

Vena-contracta formed during flow of a liquid through an orificemeter has__________________?


aMinimum liquid cross-section


bMore diameter compared to orifice diameter


cMinimum velocity of fluid stream


dNone of these



The pitot static tube does not measure the _____________ pressure?


aStatic


bTotal


cDifference in static & dynamic


dAll A., B. and C.


View Answer All A., B. and C.

The unit of dynamic viscosity in SI unit is__________________?


akg/m. sec


bN/m2


cm2 /sec


dm/N. sec


View Answer kg/m. sec

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