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Materials and Construction

Materials and Construction
Presence of high phosphorous in cast iron increases its

Shrinkage
Melting point
Fluidity
Tensile strength

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Materials and Construction
Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of

Reinforced concrete lined with lead
Stainless steel
Wood
High silicon iron (14% Si)

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Materials and Construction
Softness of silver can be converted into hardness by alloying it with small quantity of

Tin
Copper & nickel
Zinc
Aluminium

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Materials and Construction
Nickel made/clad equipments are suitable for handling

Ammonia (both aqueous & anhydrous)
Fruit juices, milk & its products and caustic soda solution
Sulphuric acid (conc)
Nitric acid & hydrochloric acid (conc)

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Materials and Construction
White metal is an alloy of

Lead, tin and cadmium
Copper and lead
None of these
Copper, tin and zinc

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Materials and Construction
The fermentor used for the production of ethyl alcohol from molasses is made of

Wood
Procelain
Copper bearing steel
Concrete

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