Q. The capital & running costs of similar machines having unequal service life can be compared by the __________ method.

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Q. Pick the odd man out.

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Q. The speed of sound will be maximum in

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Q. In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

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Q. __________ number is sometimes used in place of Grashoff number in free convection heat transfer.

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Q. Wrought iron does not have the

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Q. Hoope's cell is predominantly used for the electrolytic refining of

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Q. Lead percentage in pure galena is about

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Q. Pick out the wrong statement.

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Q. The life of a ball bearing is inversely proportional to

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Q. Pick out the wrong statement.

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Q. Nitriding of steel is a process for

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Q. The maximum percentage of chromium that can be added to steel is about

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Q. Holes in a plate for rivetted joints is preferably made by

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Q. The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.

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Q. Source of heat supply in a cupola is

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Q. The term 'Value' in value engineering technique refers to the __________ cost of the product.

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Q. Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8

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Q. The entropy change for a spontaneous process is

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Q. Milligram of KOH required to saponify 1 gm of oil is called its __________ number.

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