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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Q. With increase in impurities in metals, their corrosion resistances

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Q. Most important property of steels for use in automobile bodies is the

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Q. Consideration of the creep is the most important in case of the

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Q. The trace metal present in insulin is

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Q. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

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Q. Drossing is a __________ operation.

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Q. Most of the phosphorous present in the blast furnace burden enters into

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