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Materials and Construction

Materials and Construction
Acid proof stoneware

Is broken by small temperature changes
Cannot be heated
All of these
Has very low strength

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Materials and Construction
Which of the following is the most prone to atmospheric corrosion?

Copper
Silver
Tin
Iron

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Materials and Construction
Graphite is corroded by

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

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

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

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Materials and Construction
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as

None of these
Anodising
Parkerising
Sheradising

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Materials and Construction
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of

Rubber lined mild steel
Cast iron
Lead lined mild steel
Aluminium

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