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Materials and Construction

Materials and Construction
An alloy of iron containing 4% carbon is called

Mild steel
High carbon steel
Wrought iron
None of these

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Materials and Construction
Hydrochloric acid is __________ corrosive to common metals.

Mildly
Not
Highly
Least

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Materials and Construction
In cold working of metal as compared to its hot working

Cracks and blow holes are eliminated
Yield stress, hardness and fatigue strength is not at all affected
Ductility and impact strength improves
Appreciable strain hardening is produced

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Materials and Construction
Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of

Reinforced concrete lined with lead
Stainless steel
High silicon iron (14% Si)
Wood

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Materials and Construction
An alloy used as thermocouple material comprises of 40% nickel and 60% copper.

Chromel
Kanthal
German silver
Constantan

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Materials and Construction
The material of construction of pressure mills used for squeezing out the juice from sugar cane is

Stainless steel
Mild steel
Monel
Cast iron

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