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Engineering Materials

Engineering Materials
High carbon steel carries carbon percentage

0.8 to 1.5%
0.1 to 0.3%
0.6 to 0.8%
0.3 to 0.6%

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Engineering Materials
Isotropic materials are those which have the same

Elastic properties in all directions
Thermal properties in all directions
Stresses induced in all directions
Electric and magnetic properties in all directions

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Engineering Materials
Bell metal contains

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

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Engineering Materials
Machining properties of steel are improved by adding

Chromium, nickel
Sulphur, lead, phosphorous
Silicon, aluminium, titanium
Vanadium, aluminium

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Engineering Materials
Which of the following is an amorphous material?

Lead
Silver
Glass
Mica

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The average grain size is a minimum
The grain size first increases and then decreases very rapidly
There is no change in grain size
The grain size increases very rapidly

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