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Engineering Materials

Engineering Materials
The hardness of steel increases if it contains

Cementite
Pearlite
Martensite
Austenite

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Engineering Materials
The strength is the ability of a material to resist

Externally applied forces with breakdown or yielding
Fracture due to high impact loads
Deformation under stress
None of these

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Engineering Materials
German silver is an alloy of

Nickel and copper
Nickel, Copper and zinc
Silver and some impurities
Refined silver

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Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Magnesium
Silicon
Copper
Lead and bismuth

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Engineering Materials
Maximum percentage of carbon in austenite is

0.0026
0.008
0.00025
0.017

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

Raises
Does not effect
None of these
Lowers

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