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Engineering Materials

Engineering Materials
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

Invar
Duralumin
Silver metal
Hastelloy

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Engineering Materials
The machinability of steel is improved by adding

Sulphur, lead and phosphorus
Chromium
Nickel and chromium
Nickel

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Engineering Materials
Slow plastic deformation of metals under a constant stress is known as

Creep
Plastic deformation
Fatigue
Endurance

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Engineering Materials
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

Precipitation
Allotropic change
Heat treatment
Recrystallization

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Engineering Materials
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

Babbitt metal
Phosphor bronze
Monel metal
Nichrome

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Engineering Materials
Balls for ball bearings are made of

Stainless steel
Cast iron
Mild steel
Carbon-chrome steel

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