Q. All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent.

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Q. Which of the following gases cause global warming ?

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Q. Multistage compression of air as compared to single stage compression offers the advantage of

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Q. Fine grained steels have

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Q. Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

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Q. What is the percentage of chromium in 18-4-1 high speed steel ?

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Q. Preheating before welding is done to

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Q. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

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Q. Dew point temperature always gives an indication of the __________ of the moist air.

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Q. Hot extrusion of aluminium is done in the temperature range of __________ °C.

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Q. Stellite is a __________ material.

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Q. Percentage of argon (by volume) in dry atmospheric air is about

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Q. An abrupt and sudden fall in the readinp of barometer is an indication of the

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Q. Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are __________ respectively.

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Q. Dislocation cross-slip is difficult in those materials, which have

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Q. Shrinkage allowance on pattern is provided to compensate for shrinkage when the

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Q. Spark plug is provided in a/an

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Q. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

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Q. For the irreversible reaction, Ca+ 2C = CaC₂ , Δ H°298 = - 60000 J . mole⁻¹ . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

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Q. Projection welding & stud welding is categorised as the __________ welding.

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