Q. Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.

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Q. Which of the following will have the highest melting point ?

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Q. Galvanising is generally done on

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Q. Tin coating on metals is not done by

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Q. The softest material just next to talc in the Mho's scale is

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Q. 18/8 stainless steel means, that it contains

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Q. Glass is corroded by

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Q. Iron alloyed with carbon upto 2% is called

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Q. Carbon is present in the combined form (carbide) in case of

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Q. Chilled iron castings are

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Q. A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.

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Q. Presence of nitrogen in steel

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Q. Very high sulphur in pig iron makes

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Q. Silicon percentage in iron castings to have maximum hardness should be about

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Q. Nickel as a material of construction

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Q. __________ moulding process can not be used for thermoplastic plastics.

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Q. Which of the following crystal structures characterises the ferritic stainless steel ?

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Q. 'Semi steel' is

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Q. Which of the following is a low melting point metal ?

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Q. Trough of an apron conveyor is made of

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