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Engineering Materials

Engineering Materials
The hardness of steel increases if it contains

Cementite
Austenite
Martensite
Pearlite

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

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

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Engineering Materials
Bronze contains

70% copper and 30% zinc
70 - 75% copper and rest tin
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel

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Engineering Materials
The steel widely used for motor car crankshafts is

Silicon steel
Chrome steel
Nickel steel
Nickel-chrome steel

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Engineering Materials
Bell metal contains

70 - 75% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70% copper and 30% zinc

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Engineering Materials
Which is false statement about tempering? Tempering is done to

Improve machinability
Release stresses
Improve ductility
Improve toughness

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MORE MCQ ON Engineering Materials

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