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Materials and Construction

Materials and Construction
In the kraft (sulphate) process for the paper manufacture, the digestor is made of

Wrought iron
Karbate carbon
Cast iron
Stainless steel

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Materials and Construction
The preferred material of construction for storage tanks for 98% sulphuric acid is

Aluminium
Mild steel
Stainless steel 316
Lead

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Materials and Construction
An alloy of iron containing 4% carbon is called

None of these
High carbon steel
Mild steel
Wrought iron

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Materials and Construction
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?

Sulphur
Silicon
None of these
Phosphorus

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Materials and Construction
With increase in the carbon percentage in the steel, its

Hardness increases
Ductility reduces
All of these
Tensile strength increases

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Materials and Construction
Concrete tank can be used to store

Sulphuric acid
Ferrous sulphate
Saturated brine
Alum

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