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Chemical Engineering Basics

Chemical Engineering Basics
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

10000
100
1000
10

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

Alloy steel
Mild steel
High carbon steel
Grey cast iron

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Chemical Engineering Basics
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

Martensite
Pearlite
Austenite
Cementite

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

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

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Chemical Engineering Basics
Fatigue resistance of a material is measured by the

Ultimate tensile strength
Elastic limit
Endurance limit
Young's modulus

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Chemical Engineering Basics
For hardening high alloy steel, it is to be heated slowly and uniformly to avoid

Warpage
Local hardening
Scale formation
Segregation

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