Q. When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of

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Q. Which of the following is a case hardening process?

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Q. In a crystalline material, atoms are arranged in definite and orderly manner and form.

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Q. The austenitic stainless steel contains

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Q. The process used for relieving the internal stresses previously set up in the Metal and for increasing the machinability of steel, is

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Q. Steel containing upto 0.15% carbon, is known as

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Q. The high speed steel has __________ percentage of tungsten.

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Q. The essential constituent of a hardened steel is

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Q. The cutting tools are made from

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Q. The maximum solubility of carbon in austenite is 1.7% at 1130° C.

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Q. In a close packed hexagonal space lattice, there are

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Q. Which of the following iron exists at 910° C?

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Q. The iron ore mostly used for the production of pig iron is

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Q. A carbon steel having Brinell hardness number 100 should have ultimate tensile strength closer to

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Q. The steel widely used for making precision measuring instruments is

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Q. The ductility is the property of a material due to which it

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Q. The malleability is the property of a material due to which it can be rolled or hammered into thin sheets.

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Q. The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.

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Q. Which of the following solids are malleable and ductile?

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Q. The delta-iron possesses a body centred cubic space lattice.

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