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Materials and Construction

Materials and Construction
German silver used for decorative purposes contains maximum percentage of

Zinc
Nickel
Silver
Copper

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Materials and Construction
Containers made of high silicon cast iron (14% Si) are not suitable for the storage of

Phosphoric acid (95%) & sulphuric acid (95%)
Benzoic & boric acids
Hydrochloric acid (concentrated)
Acetic acid

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Materials and Construction
A material is called 'ductile', if it can be

Drawn into wires
Hammered to a thin sheet
Fractured without deformation
Made lustrous by heating it

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Materials and Construction
Maximum consumption of copper is in

Electrical industry
Utensil manufacture
Small scale industries
Industrial equipment manufacture

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Materials and Construction
The presence of impurities in iron

Makes it malleable
Decreases its melting point
Does not affect its melting point
Increases its melting point

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Materials and Construction
Mild steel is a/an __________ steel.

High carbon
Medium carbon
High alloy
Low carbon

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