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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
More than
None of these

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Engineering Materials
Which of the following pipes is least corrosion resistant?

Brass
Mild steel
Cast iron
Wrought iron

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Decreases
Does not effect
Increases
None of these

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Engineering Materials
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

Both A and B
Cementite
Free graphite
None of these

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Engineering Materials
A material is said to be allotropic, if it has

Any one of the above
Fixed structure at all temperatures
Atoms distributed in random pattern
Different crystal structures at different temperatures

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Engineering Materials
Which of the following is used for bearing liner?

Gun metal
Bell metal
Babbitt metal
Bronze

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