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Engineering Materials

Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Ductility
Elasticity
Plasticity
Malleability

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Engineering Materials
Depth of hardness of steel is increased by addition of

Chromium
Nickel
Vanadium
Tungsten

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Engineering Materials
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called

None of these
Atomic packing factor
Coordination number
Space lattice

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Engineering Materials
Corrosion resistance of steel is increased by addition of

Chromium and nickel
Vanadium, aluminium
Sulphur, phosphorus, lead
Tungsten, molybdenum, vanadium, chromium

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Engineering Materials
The surface hardness of the following order is achieved by nitriding operation

1000 to 1100 VPN
250 VPN
600 VPN
1500 VPN

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Engineering Materials
1841 high speed steel contains

Vanadium 18%, chromium 1% and tungsten 4%
Vanadium 1%, chromium 4% and tungsten 18%
None of these
Vanadium 4%, chromium 18% and tungsten 1%

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