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Chemical Engineering Basics

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

100
10000
1000
10

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Chemical Engineering Basics
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of

0.044444444444444
0.043055555555556
0.042361111111111
0.084027777777778

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Chemical Engineering Basics
__________ is not a heat treatment process.

Pakerising
Martempering
Austempering
Cyaniding

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Chemical Engineering Basics
Which of the following metals reacts violently with water ?

Calcium
Mercury
Sodium
Magnesium

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

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

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Chemical Engineering Basics
In radiative heat transfer, a grey surface is the one, which has

Zero reflectivity
Emissivity independent of wavelength
Grey appearance to the eye
Equal brightness in all directions

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