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Engineering Materials

Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Nickel
Chromium
Copper
Magnesium

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

1400 to 1539°C
910 to 1440°C
Below 723°C
770 to 910°C

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Engineering Materials
The addition of which of the following improves machining of copper?

Tin
Vanadium
Sulphur
Zinc

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Engineering Materials
The hardness of steel increases if it contains

Cementite
Austenite
Martensite
Pearlite

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Engineering Materials
The property of a material due to which it breaks with little permanent distortion, is called

Plasticity
Brittleness
Ductility
Malleability

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Engineering Materials
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

None of these
Hypereutectic cast irons
Eutectic cast irons
Hypoeutectic cast irons

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