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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Q. Milk is fat dispersed in water. It is an example of

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Q. __________ is the most suitable lubricant for drawing mild steel wires?

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Q. Reduction in the grain size reduces the __________ of the material.

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Q. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

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Q. In case of simple harmonic motion, displacement is proportional to the

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Q. Device used as a standard for the calibration of pressure gauges is a

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Q. X-rays are

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Q. Diffusion co-efficient of a metal in a solid solution depends upon its

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Q. Cast iron contains __________ percent carbon.

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Q. Alloys having more than 80% copper are generally more

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Q. Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxy-acetylene welding is __________ Nm³ .

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Q. Out of the following, the joint produced by __________ has the lowest strength.

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Q. Dies for wire drawing are generally made of

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