Chemical Engineering MCQs

Page No. 24

Rotary kilns are used in the____________________?


aCalcination of limestone & dolomite


bCement manufacture


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

Pick out the wrong statement?


aWrought iron contains about 0.02% carbon


bWrought iron cannot be easily forged and welded


cThe chilled cast iron does not contain graphite


dSpheroidal grey cast iron contains graphite flakes



Temperature and pressure in ammonia converter is_________________?


a200 atm, 1000°C


b450 atm, 200°C


c450 atm, 550°C


d450 atm, 1000°C


View Answer 450 atm, 550°C

While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about _____________ °C?


a2000


b3000


c4500


d6000


View Answer 4500

Raw materials for urea production are _________________?


aCO2 and N2


bCO2, H2 and N2


cNH3 and CO


dHNO3 and CaCO3


View Answer CO2, H2 and N2

Power required in case of forced draught as compared to induced draught (for the same draught produced) is___________________?


aSame


bLess


cMore


dEither more or less; depends on the flue gas density


View Answer Less

Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an ______________ reaction?


a Catalytic


bExothermic


cEndothermic


d Reversible


View Answer Exothermic

Thermal efficiency of furnaces can be improved by____________________?


aWaste heat recovery from flue gas


bMinimising heat losses from furnace walls


cMaintaining proper draught


dAll A., B. and C.


View Answer All A., B. and C.

Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at ______________ °C?


a250-300


b500-750


c950-1050


d1400-1450


View Answer 1400-1450

Pick out the correct statement?


aStainless steel is nothing but chromium coated steel


bHardening of a soft metal can be done by alloying it with another metal or non-metal


cPlastic deformation of a material is its temporary distortion under the action of applied stress


dRusting of iron is not electrochemical in nature



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