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Chemical Engineering Basics

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

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

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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
23
21/3

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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

Cheaper
Oxidised preferentially
Lighter
Reduced preferentially

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Chemical Engineering Basics
Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.

Ultrasonic
Dye penetrant
Magnetic particle
X-ray

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Chemical Engineering Basics
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

3
5
7
1.5

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Chemical Engineering Basics
Oxyacetylene reducing flame is used while carrying out welding on

Mild steel
Grey cast iron
High carbon steel
Alloy steel

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