Q. Eutectoid reaction occurs at

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Q. The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening

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Q. Nickel when added to copper improves

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Q. When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron.

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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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