Chemical Engineering MCQs

Page No. 17

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


aPremix


bOutside mixing type


cRotary


dDiffusion


View Answer Premix

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


a 10


b25


c 50


d 80


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


bOxygen enrichment of combustion air


cPreheating the fuel gas


dAll A., B. & C.


View Answer All A., B. & C.

Which of the following is a directly fired intermittent furnace ?


aWalking beam reheating furnace


bReverberatory furnace


cTower furnace


dTunnel kiln


View Answer Reverberatory furnace

_____________ is required more for leafy crops?


aNitrogen


bPhosphorous


cPotassium


dCarbon


View Answer Nitrogen

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


aTransportation of coal


bDrying of coal


cCombustion of coal by supplying it around the burner


dPreheating the primary air



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


aNickel


b Iron


cVanadium pentoxide


dAlumina


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


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


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


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



A fertiliser contains 82% N2. It could be_____________________?


a Urea


bLiquid NH3


c Ammonium nitrate


dNone of these


View Answer Liquid NH3

Example of an indirectly heated furnace is__________________?


aHood annealing furnace


bMuffle furnace


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

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