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Chemical Engineering Basics

Chemical Engineering Basics
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an

Pitot tube
Stroboscope
Rotameter
Hot wire anemometer

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Chemical Engineering Basics
Which of the following is an example of cathodic protection of metals against corrosion ?

Painted steel
Case hardened steel
Galvanised iron
Lead lined reactor

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Chemical Engineering Basics
Rain drops falling through atmospheric air attain limited terminal velocity, because of

Force of gravity
Viscous force exerted by air
Upward thrust due to air
Surface tension effects of water

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Chemical Engineering Basics
__________ forces do not act in case of fluids.

Centrifugal
Vibratory
Elastic
Tensile

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Chemical Engineering Basics
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

3CaO . SiO₂
5CaO . 3 Al2O₃
3CaO . Al2O₃
2CaO . SiO₂

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Chemical Engineering Basics
In radiative heat transfer, a grey surface is the one, which has

Equal brightness in all directions
Grey appearance to the eye
Zero reflectivity
Emissivity independent of wavelength

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