Chemical Engineering MCQs

Page No. 1

Large tonnage of refractory bricks are dried in a_____________________?


aShaft furnace


bRotary hearth furnace


cTunnel kiln


dMuffle furnace


View Answer Tunnel kiln

Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?


aAsh disposal problem


bExcessive fly ash discharge from the stack


c Higher power consumption in its transportation


dErosion of induced draft fan blades


View Answer Ash disposal problem

If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an ______________ furnace?


aSidefired


b Underfired


cCovered


d Recirculating


View Answer Underfired

_____________ atmosphere is maintained inside an iron blast furnace?


aOxidising


bReducing


cInert


dDecarburising


View Answer Reducing

Pick out the wrong statement?


aA fluid mass is free from shearing forces, when it is made to rotate with a uniform velocity


bNewton’s law of viscosity is not applicable to the turbulent flow of fluid with linear velocity


cLaminar flow of viscous liquids is involved in the lubrication of various types of bearings


dRise of water in capillary tubes reduces with the increasing diameter of capillary tubes



Pick out the wrong statement?


aThe eddy viscosity is a function of the type of turbulence involved


bThe eddy viscosity is a fluid property


cThe viscosity of gas increases with increase in temperature


dThe viscosity of a liquid increases with decrease in temperature



Pick out the correct statement pertaining to Venturimeter ?


aA Venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward


bThe co-efficient of contraction of a Venturimeter is always unity


c For a fixed pressure drop, the discharge of a gas through a Venturimeter is greater, when compressibility is taken into account, than when it is neglected


dNone of these


View Answer None of these

Which one shows the diagrammatic heat balance in a furnace ?


aSankey diagram


bCox chart


cOstwald chart


dNone of these


View Answer Sankey diagram

Pick out the correct statement?


aHuman blood is a Newtonian fluid


bA Newtonian fluid obeys Newton’s law of cooling


c For a non-Newtonian fluid, a straight line passes through the origin in a plot between shear


dThin lubricating oil is an example of a non-Newtonian fluid



In reverberatory furnace, charge is heated mainly by__________________?


aConduction


bNatural convection


cRadiation of heat from the roof of the combustion chamber


dNone of these



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