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Engineering Materials

Engineering Materials
Super conduction by metals is observed in the temperature range of

Below 10°K
Above 100°K
Around 0°C
Around 100°C

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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
Pearlite consists of

13% cementite and 87% ferrite
13% carbon and 87% ferrite
13% ferrite and 87% cementite
6.67% carbon and 93.33% iron

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Engineering Materials
The purpose of heat treatment is to

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

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Engineering Materials
White cast iron contains carbon in the form of

White carbon
Cementite
Free carbon
Graphite

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Engineering Materials
If a refractory contains high content of silicon, it means refractory is

Acidic
Brittle
Neutral
Basic

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