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Chemical Engineering Basics

Chemical Engineering Basics
Which of the following will resist maxi-mum shock & vibration without cracking?

Grey cast iron
Malleable iron
Graphite
White cast iron

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Chemical Engineering Basics
Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

0.70902777777778
0.95902777777778
1.2090277777778
0.37569444444444

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Chemical Engineering Basics
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then

It will not develop sufficient head to raise water
Its efficiency will not be affected
It will be cavitated
It will deliver low discharge of liquid

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

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

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Chemical Engineering Basics
The phenomenon of strain-ageing is generally experienced with

High manganese steel
High carbon steel
Cast iron
Low carbon steel

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Chemical Engineering Basics
The process of removal of scale formed during hot rolling of steel is termed as

Pickling
Skimming
Shot blasting
Descaling

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