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Engineering Materials

Engineering Materials
The metal suitable for bearings subjected to heavy loads, is

Silicon bronze
White metal
Monel metal
Phosphor bronze

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Engineering Materials
Cast iron is manufactured in

Bessemer converter
Open hearth furnace
Cupola
Blast furnace

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Engineering Materials
Silicon when added to copper improves

Hardness and strength
Hardness
Machinability
Strength and ductility

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Engineering Materials
The lower critical temperature

Is same for all steels
Depends upon the rate of heating
Increases as the carbon content in steel increases
Decreases as the carbon content in steel increases

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Engineering Materials
The percentage of carbon in grey iron castings usually varies between

5 to 7%
0.5 to 1%
0.012
2.5 to 4.5%

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Engineering Materials
The main alloying elements high speed steel in order of increasing proportion are

Vanadium, chromium, tungsten
Chromium, titanium, vanadium
Tungsten, chromium, titanium
Tungsten, titanium, vanadium

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