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Engineering Materials

Engineering Materials
Dye penetrant method is generally used to locate

Superficial defects
Surface defects
Temporary defects
Core defects

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

Equal to
None of these
Less than
More than

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Engineering Materials
The hardness is the property of a material due to which it

Can cut another metal
Breaks with little permanent distortion
Can be rolled or hammered into thin sheets
Can be drawn into wires

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Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Manganese
Sulphur
Carbon
Silicon

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Engineering Materials
Brass contains

70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel
70 - 75% copper and rest tin
90% copper and 10% tin

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Engineering Materials
Sulphur in cast iron

Aids fusibility and fluidity
Make the iron white and hard
Increases hardness and brittleness
Makes the iron soft and easily machinable

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