What is the reverse action and direct action
Answers were Sorted based on User's Feedback
Answer / veer yadav
When our measurement value is increasing and controller output is also increa. Then it is called direct acting and if our measurement value is increasing but controller output is decreasing then it is called reverse acting ...
Is This Answer Correct ? | 18 Yes | 1 No |
Answer / neel
According to Controller
Direct action : input increase than output increase
Reverse Action : input increase than output decrease
According to Control valve
Direct action: Air to close
Reverse Action: Air to open
Is This Answer Correct ? | 4 Yes | 0 No |
How does your previous experience relate to the job you are applying for ?
give eg of how I/P is used in control loops
what is the calibration procedure for transweigh make weigh feeder?
Where are oxygen analysers installed in cfbc boilers? What are their usual readings?
installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,
Is SmartPlant Instrumentation taking advantage of the quality assurance procedures within Intergraph?
Could you explain to me the enraf (servo gauge) mechanism. How it works ? and how it is working on archimedes theory while it's not immersed into the surface? and how can we calibrate it ? Thanx
what is disadvantage of field bus (ff)type of instrument
Why three wire is using with a RTD?
difference between accuracy and precision
i hav applied for the post of engg. in iocl so please require the past test papers fro instrumentation engg please please help me and send me the papers or tell me the pattern and type of ques asked in examination......
Why hunting will occour in control valve?