Q. According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is

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Q. Wrought iron

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Q. In iron, the presence of carbon in free form is called graphite.

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Q. In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.

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Q. The bond formed by transferring electrons from one atom to another is called

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Q. German silver contains

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Q. Connecting rod is, usually, made from

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Q. Which of the following inpurity in cast iron makes it hard and brittle?

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Q. When a low carbon steel is heated upto lower critical temperature,

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Q. Grey cast iron is __________ than white cast iron.

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Q. Corrosion resistance of steel is increased by adding nickel and chromium.

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Q. The silicon steel is widely used for

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Q. Ball bearings are, usually, made from

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Q. There are fourteen atoms in a unit cell of

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Q. The maximum internal diameter of a blast furnace is about

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Q. In spheroidising process, the steel is

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Q. Pearlite is a combination of 87% ferrite and 13% cementite.

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Q. The percentage carbon content in wrought iron is about

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Q. In the lower part of the blast furnace (zone of fusion), the temperature is

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Q. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

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