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Materials and Construction

Materials and Construction
Which of the following has a very high carbide forming tendency in steels?

Chromium
Nickel
Silicon
Vanadium

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Materials and Construction
Alinco, which is a aluminium-cobalt-nickel steel, is used for making

Powerful magnets
Surgical instruments
Chemical equipments
Boiler tubes

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Materials and Construction
Cast iron has

Very high tensile strenth
Elastic limit close to ultimate breaking strength
High malleability
High ductility

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Materials and Construction
Presence of silicon in steel

Decreases the blow holes formation tendency in castings
Indicates that steel is not deoxidised properly
Is in the form of free Si
None of these

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Materials and Construction
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.

Precipitation
Sintering
Agglomeration
Fusion

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Materials and Construction
Ball bearings are generally made of

Malleable cast iron
Chrome carbon steel
Plain carbon steel
Stainless steel

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