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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Q. During sensible heating of humid air

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Q. Photographic plates are coated with

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Q. Hardening of steel is not possible, unless it is heated __________ critical point.

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Q. Isotropic materials have the same __________ in all directions.

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Q. The most important requirement for aluminium industry is the availability of cheap

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Q. Spheriodising of a material is a/an __________ process.

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Q. Iron content in Indian iron ore is about __________ percent.

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Q. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

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Q. __________ of hard alloy and tool steel is done to make it easily machinable.

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Q. Which of the following mainly decides the current to be employed is arc welding ?

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