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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
Pearlite consists of

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

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Engineering Materials
Shock resistance of steel is increased by adding

Sulphur, lead and phosphorus
Chromium
Nickel and chromium
Nickel

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Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Silicon
Copper
Magnesium
Lead and bismuth

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Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 57
RC 80
RC 48
RC 65

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Engineering Materials
The silicon steel is widely used for

Motor car crankshafts
Cutting tools
Connecting rods
Generators and transformers in the form of laminated cores

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