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Engineering Materials

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

Chromium
Nickel
Copper
Magnesium

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

Cobalt
Molybdenum
Vanadium
Nickel

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Engineering Materials
Solder is an alloy consisting of

Tin and copper
Tin and lead
Lead and zinc
Tin, antimony, copper

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Engineering Materials
White metal contains

Silver and chromium
88% copper and 10% tin and rest zinc
Alloy of tin, lead and cadmium
63 to 67% nickel and 30% copper

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Engineering Materials
Preheating is essential in welding

Cast iron
All nonferrous materials
All of these
High speed steel

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Engineering Materials
Vanadium in high speed steels

Provides high hot hardness
Promotes decarburisation
Forms very hard carbides and thus increases wear resistance
Promotes retention of austenite

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