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Engineering Materials

Engineering Materials
Aluminium bronze contains aluminium and copper in the ratio of

2.1180555555556
40 : 60
2.5277777777778
0.47916666666667

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

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

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Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Cyaniding
Induction hardening
Electroplating
Nitriding

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Engineering Materials
Which of the following metal shrinks most from molten state to solid state?

Admiralty metal
Brass
Cast iron
Cast steel

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Engineering Materials
A material is known as allotropic or polymorphic if it

Responds to heat treatment
Has a fixed structure under all conditions
Exists in several crystal forms at different temperatures
Has its atoms distributed in a random pattern

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Engineering Materials
Mild steel belongs to the following category

Low carbon steel
Medium carbon steel
Alloy steel
High carbon steel

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