Chemical Engineering Basics
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.

Integral
Proportional
Derivative
None of these

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Chemical Engineering Basics
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?

Small punches, broaches reamers and springs
Cutlery, screws, rivets and files
Forgings like can shaft, structural steel plate, threading dies and drawing dies
Mandrels, twist drills, small lathe tools and razors

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