Q. Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70%?

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Q. Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a

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Q. Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about

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Q. Ball bearings are generally made of

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Q. Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making

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Q. Which is the purest form of iron ?

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Q. Visco-elastic behaviour of materials which is time dependent is common in

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Q. Which of the following is not an alloy of copper ?

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Q. Which of the following is the most prone to atmospheric corrosion ?

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Q. As the impurities are oxidised, the melting point of iron

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Q. In a plate type heat exchanger, heat transfer plates are never made of

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Q. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower

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Q. Metal at the top of the electromotive series is

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Q. Fatigue failure of a material may occur, when it is subjected to __________ stress.

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Q. Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.

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Q. High speed steel should have high

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Q. __________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working.

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Q. Which of the following metals in not used for coating of the base metal to guard it against corrosion ?

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Q. Brass container is suitable for storing

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Q. Aqueous nitric acid is stored in __________ vessel.

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