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Engineering Materials

Engineering Materials
The percentage of carbon in low carbon steel is

0.05%
0.15%
0.5%
0.3%

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Engineering Materials
Ductility of a material can be defined as

Ability to undergo large permanent deformations in compression
All of these
Ability to recover its original form
Ability to undergo large permanent deformations in tension

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Engineering Materials
Which of the following pipes is least corrosion resistant?

Mild steel
Cast iron
Wrought iron
Brass

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Engineering Materials
Corrosion resistance of steel is increased by addition of

Chromium and nickel
Vanadium, aluminium
Tungsten, molybdenum, vanadium, chromium
Sulphur, phosphorus, lead

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Engineering Materials
Preheating is essential in welding

All of these
High speed steel
All nonferrous materials
Cast iron

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Engineering Materials
When low carbon steel is heated up to upper critical temperature

The average grain size is a minimum
The grain size first increases and then decreases very rapidly
There is no change in grain size
The grain size increases very rapidly

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