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Chemical Engineering Basics

Chemical Engineering Basics
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.

Precipitation
Saponification
Acid
Emulsion

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Chemical Engineering Basics
The most detrimental impurity in high pressure boiler feed water is

Turbidity
Silica
Suspended salt
Dissolved salt

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Chemical Engineering Basics
Creep consideration is the most important in case of the

Cast iron pipes
Blades of gas turbines
Cycle chains
Steam engine flywheel

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Chemical Engineering Basics
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :

Mixture of water and air
Jet of water at high pressure
Rain of molten lead
Blast of air

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Chemical Engineering Basics
The most suitable material of construction for a sewer to carry sewage under high pressure is

Steel
Stoneware
Cement concrete
Asbestos cement

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Chemical Engineering Basics
Coke is added in the blast furnace to

None of these
Increase the fluidity of slag
Remove sulphur & phosphorus from molten metal
Reduce & melt the iron ore

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