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Engineering Materials

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

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

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Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Carbon
Sulphur
Silicon
Manganese

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Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

Surface defect
Line defect
Point defect
None of these

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

Bronze
Babbitt metal
Bell metal
Gun metal

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Engineering Materials
Gamma-iron occurs between the temperature ranges of

400°C to 600°C
1400°C to 1530°C
600°C to 900°C
900°C to 1400°C

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Engineering Materials
Brass contains

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

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