Q. Pick out the correct statement.

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Q. Ageing of steel refers to the

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Q. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

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Q. When metals are heated to high temperature, their __________ increases in general.

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Q. A friction lighter is normally used for lighting gas welding torch, because of the reason that

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Q. Semi-conductors normally employ __________ bonding.

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Q. High endurance limit of carburised machine parts is because of the fact that carburisation

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Q. In __________ process, there is an increase in entropy with no degradation of energy.

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Q. Which of the following is categorised as the plastic welding ?

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Q. In spite of large heat transfer co-efficients in boiling liquids, fins are used advantageously, where the entire surface is exposed to __________ boiling.

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Q. Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

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Q. __________ are normally subjected to sub-zero treatment.

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Q. Induced draft fans provided in large thermal power plant boilers have __________ blades.

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Q. Which of the following has the highest value of refractive index ?

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Q. Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

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Q. In TIG welding, thoriated tungsten electrodes are used, because it

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Q. Vernier calipers can not be used to measure the

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Q. Which of the following is not the commercial name of polymethyl-methacrylate (PMMA) ?

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Q. On being hit with a hammer, __________ will readily fracture.

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Q. Which of the following does not discharge the dust collected as a dry solid ?

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