Q. When a copper ball is heated, the largest percentage increase will be in its

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Q. Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?

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Q. The most commonly used moderator in nuclear power plant is

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Q. In an isochoric process,

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Q. Which of the following metals can be extracted from its ore by both pyrometallur-gical as well as hydrometallurgical methods ?

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Q. If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.

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Q. Piezoelectric is a material

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Q. Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.

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Q. Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs.

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Q. Which of the following has rotten eggy smell ?

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Q. Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of

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Q. In hot working, dynamic recovery occurs in

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Q. Which of the following manufacturing processes produces the strongest components ?

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Q. Cast iron compared to steel is better in

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Q. Sewage is not an excellent medium for the growth of

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Q. Which of the following pair is correctly matched?

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Q. Rate of chemical reaction is not much affected, if the reactants are in __________ form.

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Q. Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

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Q. Lubrication is done to control

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Q. In 18-4-1 high speed steel, 18, 4 & 1 respectively denote the percentage of

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