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Chemical Engineering Basics

Chemical Engineering Basics
Free oxygen is removed from boiler feed water, because it

Reduces heat transfer co-efficient
Is corrosive
Causes explosion
None of these

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Chemical Engineering Basics
__________ iron is produced by the annealing of white cast iron.

Malleable
Nodular
Grey
Ductile

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Chemical Engineering Basics
The main function of the deaerator used in the thermal power plant is to

Remove non-condensable gases from condenser
Throttle down the steam pressure
Remove dissolved gases from feed-water
Enhance feed water temperature

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

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

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Chemical Engineering Basics
In a casting, cold shut defect is caused by

Low pounhg temperature
Very low mould permeability
Faulty gating system
Melt-mould reactions

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Chemical Engineering Basics
__________ test can be termed as the semi-distructive test.

Hardness
Torsion
Charpy
Impact

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