what is the meaning of reverse action and forward action of
Answer Posted / saravanan
Direct acting valve
Air to close -- Spring to open --- Failed Open (FO)
(increasing air pressure pushes down diaphragm and extends
Reverse acting valve
Air to open -- Spring to close --- Failed Close (FC)
(increasing air pressure pushes up diaphragm and retracts
|Is This Answer Correct ?||10 Yes||2 No|
What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.
few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters
Why do we floating DC in DC system.
what is the diffrence between pressure safety valve & pressure relief valve....pls
How can measure flow in oil line?which type of transmitter is generally used?
Hook up resistance decade box to temp.transmitter.
In which principles tx ,pressure gauge,Temp gauge,control valve works?
how many type conductivity sensor ?
how many maximum enter 2mm Dia solid cylindrical pipe into 8mm Dia hollow cylindrical pipe. give answer with calculation.
what is SIL 1 2 3
What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability?
what is piezoelectric transducer?give an example in power plant n state its principle?
How to calibrate Toxic gas detector?
any one can send me instrumentation previous interview papers? I prepare for MNC Company Interviews? my mail id- Rakesh.Golla@dodsaldxb.ae , and another mail firstname.lastname@example.org
In turbine what does term CDP, NH, HSSOC means.