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Engineering Materials

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

Lowers
Does not effect
None of these
Raises

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Engineering Materials
The main alloying elements high speed steel in order of increasing proportion are

Tungsten, titanium, vanadium
Tungsten, chromium, titanium
Chromium, titanium, vanadium
Vanadium, chromium, tungsten

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Engineering Materials
The hardness of steel increases if it contains

Austenite
Martensite
Pearlite
Cementite

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Engineering Materials
Sulphur in cast iron

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

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Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Magnesium
Chromium
Copper
Nickel

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Engineering Materials
Which is false statement about normalizing? Normalizing is done to

Refine grain structure
Improve mechanical properties
Induce stresses
Reduce segregation in casting

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