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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

2.5 to 4.5%
5 to 7%
0.5 to 1%
0.012

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Engineering Materials
Which of the following metal shrinks most from molten state to solid state?

Brass
Cast steel
Admiralty metal
Cast iron

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

Constant for all metals
The points where no further change occurs
The points of discontinuity
The points where there is no further flow of metal

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Engineering Materials
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

Decrease
First increase and then decrease
Increase
Remain same

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Engineering Materials
Which of the following constituents of steels is softest and least strong?

Cementite
Ferrite
Austenite
Pearlite

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

Less than
None of these
Equal to
More than

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