Chemical Engineering MCQs

Page No. 1

Large tonnage of refractory bricks are dried in a_____________________?


aShaft furnace

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bRotary hearth furnace

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cTunnel kiln

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dMuffle furnace

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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

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bExcessive fly ash discharge from the stack

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c Higher power consumption in its transportation

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dErosion of induced draft fan blades

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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

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b Underfired

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cCovered

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d Recirculating

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View Answer Underfired

_____________ atmosphere is maintained inside an iron blast furnace?


aOxidising

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bReducing

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cInert

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dDecarburising

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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

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

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

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

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Pick out the wrong statement?


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

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bThe eddy viscosity is a fluid property

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cThe viscosity of gas increases with increase in temperature

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dThe viscosity of a liquid increases with decrease in temperature

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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

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

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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

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dNone of these

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View Answer None of these

Which one shows the diagrammatic heat balance in a furnace ?


aSankey diagram

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bCox chart

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cOstwald chart

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dNone of these

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View Answer Sankey diagram

Pick out the correct statement?


aHuman blood is a Newtonian fluid

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bA Newtonian fluid obeys Newton’s law of cooling

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

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

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In reverberatory furnace, charge is heated mainly by__________________?


aConduction

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bNatural convection

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cRadiation of heat from the roof of the combustion chamber

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dNone of these

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