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Engineering Materials

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

More than
Equal to
None of these
Less than

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Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Malleability
Elasticity
Ductility
Plasticity

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Engineering Materials
Hardness of martensite is about

RC 57
RC 48
RC 80
RC 65

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

None of these
Lowers
Raises
Does not effect

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Engineering Materials
Admiralty gun metal contains

Iron scrap and zinc
63 to 67% nickel and 30% copper
Alloy of tin, lead and cadmium
88% copper, 10% tin and rest zinc

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Engineering Materials
Which of the following property is desirable in parts subjected to shock and impact loads?

Stiffness
Brittleness
Strength
Toughness

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