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Chemical Engineering Basics

Chemical Engineering Basics
The best criterion for analysing an economic investment is the

Present value method
Future value method
Salvage value
Rate of return criterion

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Chemical Engineering Basics
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.

Diaphragm
Axial flow
Electromagnetic
Reciprocating

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

10
1000
10000
100

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Chemical Engineering Basics
First empirical temperature scale conceived is the __________ temperature scale.

Farenhite
Absolute
Reaumer
Celcius

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Chemical Engineering Basics
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

Cobalt, chromium & nickel
Cobalt, chromium & tungsten
Molybdenun, tungsten & chromium
Cobalt, zirconium & molybdenum

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Chemical Engineering Basics
Corrosion rate can not be lowered by reducing the __________ of the corroding medium.

Velocity
None of these
Concentration
Temperature

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