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Engineering Materials

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

None of these
Does not effect
Decreases
Increases

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Engineering Materials
The addition of which of the following improves machining of copper?

Zinc
Sulphur
Vanadium
Tin

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Engineering Materials
Which is the false statement about wrought iron? It has

Ability of hold protective coating
High ductility
High resistance to rusting and corrosion
Uniform strength in all directions

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Engineering Materials
Which of the following constituents of steels is softest and least strong?

Austenite
Pearlite
Cementite
Ferrite

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Engineering Materials
The ability of a material to absorb energy in the plastic range is called

Resilience
Creep
Toughness
Fatigue strength

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Engineering Materials
Preheating is essential in welding

All of these
Cast iron
All nonferrous materials
High speed steel

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