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Engineering Materials

Engineering Materials
The aluminium alloy, mainly used, for anodized utensil manufacture, is

Duralumin
Y-alloy
Hindalium
Magnalium

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Engineering Materials
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

2.1180555555556
2.9375
30 : 70
40 : 60

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Melting point
Critical temperature
Hardness
Yield point

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

910°C
1050°C
Below recrystallization temperature
770°C

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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

Recrystallization
Heat treatment
Precipitation
Allotropic change

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Engineering Materials
Corundum contains more than 95%

Al2O3
Steel
MgO
SiO2

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