Q. Electrolytic reduction cell used for conversion of calcined Al₂O₃ to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to

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Q. All radiations falling on a black body are

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Q. Styrofoam is the commercial name of

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Q. Ceramic materials are

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Q. Dryness fraction of dry steam is

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Q. Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

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Q. Heat required to raise the temperature of a body by 1 °C is called its

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Q. Coating of zinc over steel is known as

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Q. Air-petrol ratio in an automotive petrol engine is around

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Q. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called

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Q. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

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Q. Electrochemical corrosion can occur, only if __________ is present in contact with metal.

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Q. Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding

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Q. At room temperature, F.C.C. crystal structure is observed in

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Q. The basic function of the drum in a boiler is to

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Q. Pick out the wrong statement.

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Q. Colloids can be purified by

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Q. The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

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Q. Diamagnetic materials

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Q. In connection with corrosion of metals, passivation is the process that

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