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Engineering Materials

Engineering Materials
The alloying element which can replace tungsten in high speed steels is

Cobalt
Nickel
Molybdenum
Vanadium

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Engineering Materials
Which is false statement about properties of aluminium?

Creep strength limits its use to fairly low temperatures
Modulus of elasticity is fairly low
Fatigue strength is not high
Wear resistance is very good

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Engineering Materials
The material in which the atoms are arranged regularly in some directions but not in others, is called

Crystalline material
Amorphous material
Mesomorphous material
None of these

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Engineering Materials
Cementite consist of

13% carbon and 87% ferrite
6.67% carbon and 93.33% iron
13% cementite and 87% ferrite
13% ferrite and 87% cementite

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Engineering Materials
The lower critical point for all steels is

723°C
913°C
700°C
600°C

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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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