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Materials and Construction

Materials and Construction
Monel metal is an alloy of

Molybdenum and zinc
Molybdenum and nickel
Nickel and copper
Molybdenum and aluminium

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Materials and Construction
H₂SO₄ (< 50% concentration) is corrosive to

Rubber (butyl and hard), silicone rubber & teflon
Copper, cast iron & high silicon iron (14% Si)
Glass, graphite, porcelain & stoneware
Aluminium, mild steel, stainless steel, concrete & tin

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Materials and Construction
Work hardening of a material

Decreases its tensile strength
Decreases its ductility
Increases its ductility
Does not affect its ductility

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Materials and Construction
The behaviour of visco-elastic material is time dependent. This behaviour is commo in __________ materials.

Crystalline
Non-crystalline organic polymeric
Rubberry
Non-crystalline solid

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Materials and Construction
Lead lined equipments & vessels are suitable for handling

Sulphuric acid upto 60°C
All of these
Hydrochloric acid (10%)
Nitric acid

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Materials and Construction
Graphite is corroded by

Sea water
None of these
Hydrochloric acid
Sulphuric acid (10%)

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