Q. The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as

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Q. Which of the following is a point imperfection?

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Q. Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.

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Q. The fuel used in a blast furnace is

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Q. In a face centred cubic space lattice, there are

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Q. Manganese bronze contains more copper than silicon bronze.

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Q. Aluminium bronze has high resistance to corrosion.

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Q. The temperature point at which the change starts on heating the steel is called

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Q. The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.

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Q. In the middle part of the blast furnace (zone of absorption), the temperature is

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Q. Which of the following is a mesomorphous material?

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Q. The slag from the blast furnace

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Q. Which of the following gives the correct order of increasing hot hardness of cutting tool materials?

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Q. Muntz metal (Yellow brass) contains

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Q. The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics.

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Q. Which one of the following sets of constituents is expected in equilibrium cooling of a hyper-eutectoid steel from austenitic state?

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Q. The slow cooling of steel from the __________ results in a coarse grained structure.

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Q. Killed steels

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Q. The addition of magnesium to cast iron increases its

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Q. Micro-structure of a material is, generally, examined by

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