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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
10
1000
100

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Chemical Engineering Basics
Measurement of the area of the indented surface is not involved in the __________ hardhes testing method.

Vicker's
Rockwell
Brinell
Knoop

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Chemical Engineering Basics
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

Casting
Forging
Hot rolling
Cold rolling

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