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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Q. Pick out the wrong statement about powder metallurgy technique.

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Q. A floating body oscillates about its __________ when it is displaced slightly.

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Q. Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?

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Q. Ester is formed, when an alcohol reacts with

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Q. Which of the following accounts for maximum loss of energy in a coal fired boiler ?

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Q. Presence of sulphur in the fuel fired in a furnace

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Q. Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.

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Q. Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.

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Q. A thermally thin body is the one for which

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Q. Air refrigeration cycle is used in the air crafts, because of

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Q. Failure of a material is attributed to __________ if it fails below its yield point.

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Q. Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is

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Q. Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?

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Q. The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at

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