Engineering Materials
Neutral solution is one which has pH value

Equal to 7
Less than 7
Greater than 7
pH value has nothing to do with neutral solution

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Engineering Materials
The charge of the blast furnace consists of

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

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Engineering Materials
Malleable cast iron

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is produced by annealing process. It is soft, tough, and easily machined metal
Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

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