Chemical Engineering MCQs

Page No. 775

Natural water contains approximately ______________ percent of heavy water?


a0.015


b0.71


c1.2


d3.5


View Answer 0.015

Exposure to _________________ accelerates the degradation of plastics?


aUltraviolet radiation


bHigh atmospheric temperature


cHigh ambient temperature


dDamp atmosphere


View Answer Ultraviolet radiation

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) ?


ax1.5


bx0.8


cx-1.5


dx-0.8


View Answer x0.8

Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?


a300


b800


c1400


d2000


View Answer 1400

A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness ______________ metre?


a0.01


b0.1


c0.25


d0.5


View Answer 0.1

For grinding of softer materials, the grinding wheel should have _________________ grain size ?


aFiner


bCoarser


cMedium


dAny type of


View Answer Coarser

Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________?


aR ln 2


b-R ln 2


c3 R ln 2


d-3R ln 2


View Answer R ln 2

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index ‘n’ is______________________?


a1


b1.4


c1.5


dY = Cp/Cv


View Answer 1

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) ?


aA


bD


c1/A


d1/A2


View Answer 1/A

Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?


aConcentration


bVelocity


cTemperature


dNone of these


View Answer Concentration

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