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Engineering Materials

Engineering Materials
A cold chisel is made of

High carbon
Mild steel
Cast iron
H.S.S.

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Hot tempering
Hot hardness
Creep
Fatigue

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Engineering Materials
The purpose of heat treatment is to

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

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Engineering Materials
In mottled cast iron, carbon is available in

Free form
Partly in free and partly in combined state
Nodular form
Combined form

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Engineering Materials
1841 high speed steel contains

Vanadium 4%, chromium 18% and tungsten 1%
Vanadium 18%, chromium 1% and tungsten 4%
None of these
Vanadium 1%, chromium 4% and tungsten 18%

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Engineering Materials
Free cutting steels

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

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