Q. __________ flux is used for the extraction of metal from its self fluxing ores.

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Q. Good design of the casing of a centrifugal pump aims at minimising the

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Q. Which of the following is not a dielectric material ?

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Q. Magnetic permeability of iron is increased by its

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Q. The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

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Q. Material of construction of foundary crucible is

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Q. Young's modulus of a material is the measure of its

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Q. Which of the following is not used as a bearing material ?

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Q. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

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Q. Water flow in the river during flood can be categorised as the __________ flow.

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Q. Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of

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Q. Out of the following, the dimensionless quantity is

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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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