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Engineering Materials

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

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

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

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

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Engineering Materials
The transistor is made of

Germanium
Silver
Copper
Gold

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Engineering Materials
The machinability of steel is improved by adding

Sulphur, lead and phosphorus
Nickel and chromium
Chromium
Nickel

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Engineering Materials
Monel metal contains

88% copper and 10% tin and rest zinc
63 to 67% nickel and 30% copper
Malleable iron and zinc
Alloy of tin, lead and cadmium

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Engineering Materials
Which of the following property is desirable in parts subjected to shock and impact loads?

Strength
Brittleness
Stiffness
Toughness

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