Engineering Materials
The lower critical temperature

Depends upon the rate of heating
Is same for all steels
Decreases as the carbon content in steel increases
Increases as the carbon content in steel increases

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Engineering Materials
The charge of the blast furnace consists of

Calcined ore, coke and limestone all in equal parts
Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

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