Q. Which of the following alloying elements when added in steel does not improve its lachinability ?

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Q. Largest application of laser welding is in __________ welding.

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Q. Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?

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Q. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm² .

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Q. Value of a material is usually considered as a relationship between

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Q. Which of the following is not an ore of zinc?

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Q. Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to

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Q. Phosphorous is added to copper melt to

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Q. Which of the following is not a suitable solid lubricant ?

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Q. On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium-235.

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Q. In a titration involving weak acid and strong base, the preferred indicator is

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Q. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)

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Q. Pick out the wrong statement.

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Q. Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.

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Q. Which of the following heat treatment processes is used for softening the hardened material ?

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Q. The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.

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Q. The radioactive isotope of hydrogen is

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Q. Refrigerative cooling employed during long distance transportation of food stuffs is normally done by

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Q. Internal cracks in drawn bars are due to

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Q. Yield strength of a polycrystalline metal with an average grain size, d, is proportional to

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