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Chemical Engineering Basics

Chemical Engineering Basics
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

Forging
Powder metallurgy
Casting
None of these

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Chemical Engineering Basics
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

25/2
23/2
21/3
23

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Chemical Engineering Basics
Powder metallurgy process does not make metal powder by

Hammering
Grinding/milling
Electrolytic deposition
Atomisation

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Chemical Engineering Basics
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is

Lighter
Reduced preferentially
Cheaper
Oxidised preferentially

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Chemical Engineering Basics
What is the value of included angle of a triangular notch for maximum discharge ?

90°
30°
120°
60°

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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
Emissivity independent of wavelength
Zero reflectivity

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