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Engineering Materials

Engineering Materials
The addition of which of the following improves machining of copper?

Sulphur
Zinc
Vanadium
Tin

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Engineering Materials
Vanadium in high speed steels

Promotes decarburisation
Promotes retention of austenite
Forms very hard carbides and thus increases wear resistance
Provides high hot hardness

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

Bronze
Babbitt metal
Gun metal
Bell metal

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Engineering Materials
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

Heat treatment
Allotropic change
Recrystallization
Precipitation

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Engineering Materials
Steel containing ferrite and pearlite is

Soft
Hard and tough
Tough
Hard

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Engineering Materials
Cold rolled steel sheets contain carbon of the following order

0.001
0.004
0.006
0.002

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