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Engineering Materials

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

Austenite
Cementite
Ferrite
Pearlite

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Engineering Materials
The blade of a power saw is made of

Stainless steel
Malleable cast iron
High speed steel
Boron steel

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

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

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Engineering Materials
Free cutting steels

Is used where rapid machining is the prime requirement
Can be cut freely
Require minimum cutting force
Contain carbon in free from

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Engineering Materials
Compressive strength of grey cast iron in tonnes/cm is of the order of

35
710
57
1015

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Engineering Materials
Balls for ball bearings are made of

Stainless steel
Carbon-chrome steel
Mild steel
Cast iron

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