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Engineering Materials

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

Bell metal
Gun metal
Babbitt metal
Bronze

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Engineering Materials
Addition of silicon to aluminium results in

One of the best known age and precipitation hardening systems
Improvement of casting characteristics
Improving machinability
Improvement of corrosion resistance

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Engineering Materials
Pearlite consists of

13% ferrite and 87% cementite
13% cementite and 87% ferrite
13% carbon and 87% ferrite
6.67% carbon and 93.33% iron

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Engineering Materials
Tensile strength of steel can be safely increased by

Adding carbon up to 6.3%
Adding carbon up to 0.83%
Adding carbon up to 2.8%
Adding small quantities of copper

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Engineering Materials
Recrystallization temperature can be lowered by

Purification of metal
All of these
Working at lower temperature
Grain refinement

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Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Equal to
More than
Less than
None of these

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