Q. Galena is an ore of

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Q. A reduction process is accompanied with increase in the

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Q. Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

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Q. The dimensions of Planck's constant is the same as that of the

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Q. 1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

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Q. The ratio of coil diameter to wire diameter of a spring is called the spring

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Q. Dialysis is the process of separating substances in the

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Q. Silicon crystal can be converted to p-type semi-conductor by doping with

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Q. Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

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Q. Increase in the entropy of a system represents the

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Q. Property responsible for the talcum powder to cling to the skin is the

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Q. __________ has a negative co-efficient of linear expansion.

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Q. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

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Q. Basic open hearth furnace (BOF) is not used for producing __________ steel.

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Q. Principal alloying element in Elinvar (used for making hair springs for watches) is

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Q. The value of y = Cᵨ/Cᵥ. at < 500°C for air & most common gases can be safely assumed to be

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Q. Tesla metre per ampere (T. m/A) is the unit for the measurement of

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Q. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

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Q. Which of the following is an acidic constituent of B.F. slag ?

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Q. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is

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