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Materials and Construction

Materials and Construction
Cast iron detachable joint is used in __________ pipes.

Asbestos cement
Steel
Reinforced cement concrete
Cast iron

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Materials and Construction
When iron is rusted, it is

Converted to a fine powder
None of these
Oxidised
Reduced

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Materials and Construction
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

2
8
0.2
4

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Materials and Construction
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.

Arsenic
Both B and C
Antimony
Bismuth

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Materials and Construction
Presence of nickel in steel improves its

All of these
Wear resistance
Cutting ability
Corrosion resistance

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Materials and Construction
Caustic soda can be stored in __________ drums.

Gun metal
Cast iron
Steel
Brass

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