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Engineering Materials

Engineering Materials
In mottled cast iron, carbon is available in

Nodular form
Free form
Partly in free and partly in combined state
Combined form

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Engineering Materials
Gun metal contains

70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel
70 - 78% copper and rest tin
90% copper and 10% tin

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Engineering Materials
Steel made from phosphate iron is

Brittle
Tough
Hard
Ductile

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Engineering Materials
Taps dies and drills contain carbon

Above 1%
Above 2.2%
Below 1%
Below 0.5%

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Engineering Materials
The hardness of steel increases if it contains

Austenite
Pearlite
Martensite
Cementite

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Engineering Materials
The charge is fed into the blast furnace through the

Tyres
Stack
Bosh
Throat

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