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Engineering Materials

Engineering Materials
An eutectoid steel consists of

Wholly austenite
Pearlite and ferrite
Wholly pearlite
Pearlite and cementite

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Engineering Materials
Which of the following is not the correct method of increasing fatigue limit?

Cold working
Surface decarburisation
Nitriding of surface
Shot peening

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

Nickel, copper and zinc
Nickel, copper and iron
Copper, nickel and antimony
Iron, zinc and bismuth

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Engineering Materials
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

Manganese
Sulphur
Phosphorus
Silicon

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Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Cast iron
Aluminium
Steel
Brass

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Engineering Materials
Grey cast iron has

Low compressive strength
Carbon in the form of free graphite
All of these
High tensile strength

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