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Engineering Materials

Engineering Materials
The following element can't impart high strength at elevated temperature

Nickel
Magnesium
Silicon
Manganese

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

None of these
Does not effect
Raises
Lowers

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Engineering Materials
Preheating is essential in welding

High speed steel
Cast iron
All nonferrous materials
All of these

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Engineering Materials
The transistor is made of

Gold
Silver
Copper
Germanium

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Engineering Materials
Brass contains

70 - 75% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70% copper and 30% zinc

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Engineering Materials
Sulphur in cast iron

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

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MORE MCQ ON Engineering Materials

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