Q. Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when

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Q. Lead is most readily dissolved in

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Q. Which of the following is a synthetic abrasive ?

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Q. Dezincification is a form of corrosion, which specifically applies to

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Q. Water hammer in pipelines results, when the flowing fluid

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Q. The preferred alloying element for low temperature applications of steel is

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Q. Production of one ton of steel plate in a modern integrated steel plant in India consumes about __________ kWh of electricity.

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Q. Ceramic tips for the cutting tool are prepared from __________ powder.

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Q. Fatigue strength of a metal is improved by

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Q. Saturated steam at a pressure of 25 kg/cm² is throttled to attain 5 kg/cm² . Then the outcoming steam will be

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Q. An "orange peel" effect is observed

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Q. Which of the following is a boiler accessory i.e., not a boiler mounting ?

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Q. Which of the following forces does not act on a fluid at rest ?

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Q. Density in the solid state is slightly less than that in its liquid state, in case of

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Q. Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.

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Q. __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

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Q. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?

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Q. If Reynolds number is greater than 1, then the

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Q. The type of pump used for lifting large quantity of sewage is a __________ pump.

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Q. Which of the following metals is not subjected to electrolytic refinning/purification?

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