Chemical Engineering MCQs

Page No. 23

Hydrogen content of coke oven gas is ______________ percent?


a4

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b 22

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c58

✓


d84

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View Answer 58

Pick out the wrong statement?


aPure rubber is as useless as pure gold as a material of construction

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bThermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making

✓


cCopper has poor weldability

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dReinforced plastics are made from both thermoplastic as well as thermosetting plastics

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Maximum thermal efficiency of boiler may be about _____________ percent?


a10

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b25

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c65

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d90

✓


View Answer 90

CaH4(PO4)2 is the chemical formula of ___________________?


a Superphosphate

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bTriple superphosphate

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cCalcium phosphate

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dMeta phosphoric acid

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View Answer Triple superphosphate

Advantages of use of preheated combustion air are__________________?


aSaving in fuel consumption

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bReduction in scale losses

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cIncrease in flame temperature

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dAll A., B. and C.

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View Answer All A., B. and C.

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about _____________ percent?


a20

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b40

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c60

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d80

✓


View Answer 80

C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________?


a 2

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b6

✓


c13

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d20

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View Answer 6

Very high pressure boilers are usually _____________ boilers?


aFire tube

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bWater tube

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cWaste heat

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dNatural circulation

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View Answer Natural circulation

Pot furnace which is either regenerative or recuperative, is used in the manufacture of____________________?


aGlass

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bStainless steel

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cPotteries

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dRefractory bricks

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View Answer Glass

Soaking pits are meant for heating steel_________________?


aIngots

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bCoils

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cSheets

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dSlabs

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View Answer Ingots

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