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Engineering Materials

Engineering Materials
Pipes for bicycle frames are made of

Cold rolled steel
Forged steel
Hot rolled steel
Cast steel

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Engineering Materials
Dislocations in materials refer to the following type of defect

Point defect
Line defect
Volumetric defect
Plane defect

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Engineering Materials
Bell metal contains

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

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Engineering Materials
In grey cast iron, carbon is present in the form of

Spheroids
Cementite
Free carbon
Flakes

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Engineering Materials
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

Duralumin
Silver metal
Invar
Hastelloy

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Engineering Materials
Which of the following statements are true for annealing of steels?

Internal stresses are relieved
Steels are heated to 500 to 700°C
Cooling is done slowly and steadily
All of these

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