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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Q. Role of a "collector" in froth floatation is to

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Q. For the running of power generating turbines, the steam used should be

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Q. Creep consideration is the most important in case of the

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Q. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10⁻¹⁶ m² . S⁻¹ and it is 1.94 x 10⁻¹⁴ m² S⁻¹ at 1200 K. The activation energy (in k. J.mole⁻¹ ) for the diffusion of Ni in Cu is

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Q. The magnitude of water hammer caused in pipe flow is independent of the

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Q. A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid ?

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Q. Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

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