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Materials and Construction

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

Sheradising
Anodising
Parkerising
None of these

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Materials and Construction
Polythene (low or high density) containers are not corroded by

Sulphuric acid (10%) at room temperature
Sulphur trioxide at 60°C
Nitric acid (95%) at room temperature
Any of these

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Materials and Construction
A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.

Mercury
Zinc
Lead
Tin

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Materials and Construction
18/8 stainless steel means, that it contains

18% nickel and 8% chromium
18% chromium and 8% nickel
18% chromium and 8% molybdenum
18% molybdenum and 8% chromium

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Materials and Construction
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of

High carbon steel
Aluminium
Brass
Copper

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Materials and Construction
Glass is corroded by

None of these
Sulphuric acid
Fluorine (dry or wet)
Phosphoric acid

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