Q. Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ?

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Q. Which of the following has the least carbon percentage ?

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Q. __________ is never shipped in glass carboys.

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Q. Lead is

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Q. Nitriding of steel is done (in electric furnace) at __________ °C.

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Q. Addition of 2% nickel in steel makes it suitable for making

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Q. The softest material just next to talc in the Mhos scale is

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Q. Babbit metals used for making bearings are

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Q. Pipes for bi-cycle frames are made of __________ steel.

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Q. Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ?

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Q. Interchain forces are the weakest in case of

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Q. __________ possesses viscoelastic properties.

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Q. Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of

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Q. Bearings subjected to light load are made of

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Q. Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

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Q. __________ does not contain tin as an alloying material.

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Q. A metallic alloy in general as compared to their pure metal components is

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Q. Pick out the wrong statement.

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Q. Ball bearings are normally made of __________ steel.

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Q. The electrical conductivity of a __________ decreases with rise in temperature.

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