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Chemical Engineering Basics

Chemical Engineering Basics
Brinell Hardness Number (BHN) for talc is approximately in the range of

100-150
1-5
20-30
200-250

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Chemical Engineering Basics
__________ is not a heat treatment process.

Cyaniding
Austempering
Pakerising
Martempering

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Chemical Engineering Basics
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Relatively high sulphur content in the base metal
Sufficient hydrogen present in the welding arc
Retained austenite
Martensite formation

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Chemical Engineering Basics
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.

Tensile
Fatigue
Creep
Endurance

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Chemical Engineering Basics
Ultimate strength in tension as compared to that in shear for steel is

Half
One and half times
One fourth
One third

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

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

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