Q. Heating of an ore below its melting point in presence of excess of air is called

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Q. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

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Q. A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.

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Q. Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.

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Q. In which of the following reactions, application of vacuum will help ?

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Q. Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.

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Q. Pick out the wrong statement.

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Q. Which of the following exemplifies resemblence with the extrusion process ?

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Q. The routing function in a production system design is concerned with the

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Q. Filler material used in welding having the lowest melting point out of the following is

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Q. Which of the following has the highest density and the lowest melting point ?

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Q. Electrolytes conduct electric current by

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Q. To improve the machinability of steel by its softening, it is subjected to

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Q. A material expanding freely due to heating will develop __________ stress.

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Q. A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.

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Q. More than 1000 tons refrigeration capacity plants are usually of __________ type.

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Q. Pick out the wrong statement.

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Q. The increase in hardness of metal due to its cold working is termed as the __________ hardening.

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Q. Gas carrying pipelines are best joined by

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Q. Scab is a defect developed during __________ of metals.

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