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Engineering Materials

Engineering Materials
Which of the following material has maximum ductility?

Mild steel
Copper
Aluminium
Nickel

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Engineering Materials
In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled

Slowly in the furnace
Suddenly in a suitable cooling medium
Any one of these
In still air

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Engineering Materials
Foundry crucible is made of

Graphite
German silver
Lead
Mild steel

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Engineering Materials
Gamma-iron occurs between the temperature ranges of

1400°C to 1530°C
600°C to 900°C
400°C to 600°C
900°C to 1400°C

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Engineering Materials
Balls for ball bearings are made of

Mild steel
Carbon-chrome steel
Cast iron
Stainless steel

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Engineering Materials
The presence of hydrogen in steel causes

Embrittlement
Improved Weldability
Reduced neutron absorption cross-section
Corrosion resistance

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