Q. Tin plated iron and galvanised iron are generally produced by

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Q. In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

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Q. Dezincification is a form of corrosion espe-cially applicable to

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Q. Which of the following materials is not suitable as a die material for wire drawing?

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Q. By X-ray diffraction, it is not possible to determine the

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Q. In continuous casting process, graphite moulds are used with a view to providing

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Q. Energy required to compress a hot gas as compared to cold gas will be

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Q. In the commercial production of which of the following metals, matallothermic reduction is used ?

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Q. New water wells are disinfected with chlorine in the form of

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Q. In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

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Q. Plants produce carbohydrates from the CO₂ present in the atmosphere by

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Q. Identify the correct statement with reference to the extractive metallurgy of aluminium.

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Q. A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to

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Q. Which of the following is not used as an alloying element in steel used for making permanent magnetic material ?

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Q. Pick out the wrong statement.

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Q. When a tuning fork vibrates, the waves produced in the fork are

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Q. Fatigue limit of a material should not be increased by

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Q. For a fixed cross-sectional area, the most economical channel section has maximum

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Q. Pellets are not as popular a burden as sinter in the iron blast furnace, because of their

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Q. A form of stress corrosion failure termed as 'season cracking' is generally observed in

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