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Materials and Construction

Materials and Construction
Which of the following finds the least commercial use?

Pure iron
High carbon steel
High silicon iron
Low carbon steel

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Materials and Construction
Alpha iron is stable __________ °C.

Between 910 & 1403
Upto 910
Above 1403
Above 1800

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Materials and Construction
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its

Tensile strength
Corrosion resistance
Compressive strength
Machinability

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Materials and Construction
Which of the following is a light alloy?

Dow metal
Monel metal
German silver
Babbit metal

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Materials and Construction
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by

Acetic acid
None of these
Dilute HC₁
v

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Materials and Construction
Presence of manganese in alloy steel improves its

Abrasion resistance & toughness
Elasticity & creep resistance
Corrosion resistance
Cutting ability

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