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Chemical Engineering Basics

Chemical Engineering Basics
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

Three
Two
One
None of these

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Chemical Engineering Basics
Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

SiO₂
Al2O₃
P
MnO₂

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Chemical Engineering Basics
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?

Limestone
Coke
Iron ore
Sinter

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Chemical Engineering Basics
The process of removal of scale formed during hot rolling of steel is termed as

Skimming
Descaling
Pickling
Shot blasting

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Chemical Engineering Basics
Boiler draught of 10 mm water column is equivalent to

10 kgf/mm²
1 kgf/mm²
1 kgf/m²
10 kgf/m²

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Chemical Engineering Basics
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

10
1000
10000
100

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