Chemical Engineering MCQs

Page No. 208

The resistance wire used in a hot wire anemometer for conducting electrical current is made of__________________?


aCopper


bTungsten


cChromium


dAluminium


View Answer Tungsten

The centre of pressure is_________________?


aAlways below the centroid of the area


bAlways above the centroid of the area


cA point on the line of action of the resultant force


dAt the centroid of the submerged area



The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke’s law range is proportional to the_____________________?


aInverse of fluid viscosity


bSquare of particle size


cDifference in the densities of the particle & fluid


dAll A., B. and C.


View Answer All A., B. and C.

The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a____________________?


aWeir


bPitot tube


cKennison nozzle


dV-notch


View Answer Pitot tube

The bulk modulus of elasticity of a liquid__________________?


aIs zero for incompressible liquid


bDecreases with pressure


cIs independent of temperature & pressure


dIncreases with pressure



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


a1/√M


b√M


c1/M


dM


View Answer 1/√M

In the laminar boundary layer flow over a flat plate, the ratio (δ/x) varies as: (where, ‘δ’ is the boundary layer thickness and ‘x’ is the distance from the leading edge in the direction of flow)?


aRe


b√Re


c1/Re


dRe-1/2


View Answer Re-1/2

An ideal nozzle design aims at________________?


aMinimising wall friction


bSuppressing boundary layer separation


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

One horsepower is equal to________________?


a550 lbf.ft/second


b550 kgf.m/second


cBoth A. and B.


d550 lbf.ft./hr


View Answer 550 lbf.ft/second

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


a1/√T


b1/T


c√T


dT


View Answer √T

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