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Engineering Materials

Engineering Materials
The steel widely used for motor car crankshafts is

Nickel steel
Chrome steel
Nickel-chrome steel
Silicon steel

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Engineering Materials
Cementite consist of

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

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

50 : 20 : 20 : 10
50 : 20 : 10 : 20
40 : 30 : 20 : 10
30 : 20 : 30 : 20

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Engineering Materials
A material is said to be allotropic, if it has

Any one of the above
Atoms distributed in random pattern
Fixed structure at all temperatures
Different crystal structures at different temperatures

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Engineering Materials
Solder is an alloy consisting of

Tin, antimony, copper
Tin and lead
Lead and zinc
Tin and copper

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Engineering Materials
Mild steel belongs to the following category

Medium carbon steel
Alloy steel
Low carbon steel
High carbon steel

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