Chemical Engineering MCQs

Page No. 17

If fuel and air are mixed ahead of the burner, it is called a/an ______________ burner?


aPremix

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bOutside mixing type

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cRotary

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dDiffusion

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View Answer Premix

Nitrogen content of calcium ammonium nitrate (CAN) is _____________ percent?


a 10

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b25

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c 50

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d 80

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View Answer 25

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by______________________?


aPreheating the combustion air

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bOxygen enrichment of combustion air

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cPreheating the fuel gas

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dAll A., B. & C.

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View Answer All A., B. & C.

Which of the following is a directly fired intermittent furnace ?


aWalking beam reheating furnace

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bReverberatory furnace

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cTower furnace

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dTunnel kiln

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View Answer Reverberatory furnace

_____________ is required more for leafy crops?


aNitrogen

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bPhosphorous

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cPotassium

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dCarbon

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View Answer Nitrogen

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of_________________?


aTransportation of coal

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bDrying of coal

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cCombustion of coal by supplying it around the burner

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dPreheating the primary air

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Catalyst used in the manufacture of NH3 by Haber’s process is finely divided________________?


aNickel

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b Iron

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cVanadium pentoxide

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dAlumina

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View Answer Iron

Pick out the wrong statement?


aThe shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). Δp

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bIn the equation, T. gc = k. (du/dy)n the value of ‘n’ for pseudoplastic and Dilatant fluid are 1 respectively

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cShear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion

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dWith increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

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A fertiliser contains 82% N2. It could be_____________________?


a Urea

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bLiquid NH3

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c Ammonium nitrate

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dNone of these

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View Answer Liquid NH3

Example of an indirectly heated furnace is__________________?


aHood annealing furnace

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bMuffle furnace

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cBoth A. and B.

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dNeither A. nor B.

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View Answer Both A. and B.

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