Q. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?

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Q. The purpose of nitriding the steel is to

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Q. Sulphur melting pit in the sulphuric acid plant is made of

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Q. The hardest material just prior to diamond in Mho's scale is

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Q. Percentage elongation of a material is a measure of its

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Q. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with

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Q. Heavy duty bearings are usually made of

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Q. Which of the following has the highest compressive strength ?

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Q. Zinc is not used

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Q. Refined acetic acid storage vessel are made of

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Q. Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.

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Q. Constantan is an alloy of

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Q. Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.

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Q. White cast iron is not

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Q. Galvanised iron is

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Q. German silver used for decorative purposes contains maximum percentage of

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Q. The metals occuring at the lower most position in the electromotive series

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Q. The main purpose of galvanising iron sheets is to

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Q. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

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Q. Invar used in thermocouples is an alloy of nickel and

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