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Engineering Materials

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

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

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Engineering Materials
The material in which the atoms are arranged chaotically, is called

None of these
Mesomorphous material
Crystalline material
Amorphous material

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Engineering Materials
In which of the following cases, consideration of creep is important

Flywheel of steam engine
Cycle chains
Gas turbine blades
Cast iron pipes

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Engineering Materials
Recrystallization temperature can be lowered by

Purification of metal
All of these
Working at lower temperature
Grain refinement

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Engineering Materials
Corrosion resistance of steel is increased by adding

Chromium and nickel
Tungsten and sulphur
Nickel and molybdenum
Aluminium and zinc

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Hot hardness
Fatigue
Creep
Hot tempering

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