Q. Which metal is protected by the layer of its own oxide ?

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Q. Steel tower used for the storage of oleum

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Q. Plastics are

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Q. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of

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Q. Wood is corroded by

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Q. Brass is an alloy of

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Q. The fermentor used for the production of ethyl alcohol from molasses is made of

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Q. Super conductors are those substances, which

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Q. Cermets are used for making

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Q. The formation of oxide film on a metal due to atmospheric exposure reduces its

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Q. A hardened steel essentially contains

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Q. Which one contains the least percentage of carbon ?

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Q. Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of

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Q. All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain

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Q. Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)

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Q. Which of the following is not a copper based alloy with nickel ?

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Q. Which of the following alloys does not contain nickel ?

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Q. An elastic behaviour of materials is expressed in terms of

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Q. Pure nickel is

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Q. In drop forging process, the forging is done by dropping the __________ at high velocity.

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