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Engineering Materials

Engineering Materials
The hardness of steel increases if it contains

Martensite
Austenite
Pearlite
Cementite

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

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

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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
The molecules in a solid move

In a haphazard way
In a random manner
In circular motion
Back and forth like tiny pendulums

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Engineering Materials
The metal suitable for bearings subjected to heavy loads, is

Monel metal
White metal
Silicon bronze
Phosphor bronze

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Engineering Materials
The purpose of heat treatment is to

Modify the structure of the material
Change grain size
Relieve the stresses set up in the material after hot or cold working
Any one of these

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