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Engineering Materials

Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Less than
Equal to
None of these
More than

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Engineering Materials
Connecting rod is, usually, made from

Low carbon steel
High carbon steel
Medium carbon steel
High speed steel

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Engineering Materials
Manganese is added in low carbon steel to

Make the steel tougher and harder
Raise the yield point
Make the steel ductile and of good bending qualities
All of these

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

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

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Engineering Materials
In nodular iron, graphite is in the form of

Cementite
Spheroids
Flakes
Free carbon

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Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 57
RC 80
RC 65
RC 48

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