Chemical Engineering MCQs

Page No. 24

Rotary kilns are used in the____________________?


aCalcination of limestone & dolomite

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bCement manufacture

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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.

Pick out the wrong statement?


aWrought iron contains about 0.02% carbon

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bWrought iron cannot be easily forged and welded

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cThe chilled cast iron does not contain graphite

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dSpheroidal grey cast iron contains graphite flakes

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Temperature and pressure in ammonia converter is_________________?


a200 atm, 1000°C

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b450 atm, 200°C

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c450 atm, 550°C

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d450 atm, 1000°C

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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

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b3000

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c4500

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d6000

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View Answer 4500

Raw materials for urea production are _________________?


aCO2 and N2

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bCO2, H2 and N2

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cNH3 and CO

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dHNO3 and CaCO3

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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

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bLess

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cMore

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dEither more or less; depends on the flue gas density

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View Answer Less

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


a Catalytic

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bExothermic

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cEndothermic

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d Reversible

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View Answer Exothermic

Thermal efficiency of furnaces can be improved by____________________?


aWaste heat recovery from flue gas

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bMinimising heat losses from furnace walls

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cMaintaining proper draught

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dAll A., B. and C.

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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

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b500-750

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c950-1050

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d1400-1450

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View Answer 1400-1450

Pick out the correct statement?


aStainless steel is nothing but chromium coated steel

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

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

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dRusting of iron is not electrochemical in nature

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