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Engineering Materials

Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Nitriding
Cyaniding
Electroplating
Induction hardening

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Engineering Materials
Sulphur in cast iron

Aids fusibility and fluidity
Make the iron white and hard
Increases hardness and brittleness
Makes the iron soft and easily machinable

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Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

1500°C to 1700°C
400° to 700°C
800°C to 1000°C
1200°C to 1300°C

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Engineering Materials
Addition of lead and bismuth to aluminium results in

Improving machinability
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance
Improvement of casting characteristics

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Engineering Materials
The blade of a power saw is made of

Stainless steel
Boron steel
Malleable cast iron
High speed steel

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Does not effect
Decreases
Increases
None of these

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MORE MCQ ON Engineering Materials

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