Q. A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m² . The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

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Q. The maximum value, which the residual stress in a material can reach is the __________ of the material.

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Q. What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.

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Q. Which set of materials is used as a moderator in nuclear reactor ?

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Q. Malleabilisation heat treatment is performed on

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Q. For hardening high alloy steel, it is to be heated slowly and uniformly to avoid

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Q. Disposable patterns are made of

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Q. Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.

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Q. Which of the following is the most effective inhibitor of grain growth, when added in small quantity in steel ?

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Q. A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.

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Q. An ideal fluid is

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Q. Which of the following is not found in iron-carbon equilibrium diagram ?

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Q. Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?

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Q. Nitrogen compounds are not used in the manufacture of

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Q. Stellite is a trade name for the

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Q. Needles are produced by

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Q. High __________ of cast iron makes it suitable for use in machine beds.

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Q. Which of the following alloying elements reduces the formation of iron sulphide in steel ?

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Q. In age-hardenable alloys, maximum ductility is obtained

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Q. Prandtl mixing length in turbulent flow signifies the

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