What is the reverse action and direct action

2 Answers   Samsung,

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why 4-20 mA signal is preferred over a 0-10V signal

17 Answers   Sofcon,

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An atmospheric storage tank has a diameter of 20 m and a height of 8m.It is half-full of liquid with the remainder of the space containing air normally at atmospheric pressure. If the connection to atmosphere is accidentally closed off and 10 cubic m of liquid removed, what happens to the internal pressure of the tank? What are the possible consequences for the tank?

1 Answers  

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What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).

0 Answers  

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difference between DCS @ SCADA system? and how can use in field

5 Answers   Marafiq,

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in the pipe line if the control valve fails to respond to controller action,by what means we can stop the flow in the pipe line ?

9 Answers  

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in my company organisation in plan to take new PLC system for replacing old relay system , for that what I/P needsd to submit to the system house of PLC supplier?

1 Answers  

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i m passed my engineering in 2010 in instrumentation and control engineering. my question is can i apply for software jobs or vacancies.??????????? plz give me answer soonnn......

2 Answers  

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Is there a particular problem if two proposals from the same observatory (originating with different partners) are submitted?

1 Answers  

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How to calibrate electronic type level switch low?

1 Answers  

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I want to measure bidirectional steam flow? Kindly suggest me a suitable flow meter. steam is superheated at 41kg/cm2, 350°C

2 Answers  

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why do we use 4-20 ma current why cant o-20ma

6 Answers   Southwest Cheese,

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