what is the use of impulse line in AFBC boiler , WHY WE CONNECT IMPULSE LINE TO TRANSMITTER , DRFT GAUGE ETC ????????

6 Answers   Jindal, Reliance,

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radial & axial vibration sensor output voltage is ac or dc volt?

8 Answers   Vedanta, Voltech,

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can you provide me full detail about instrumentation in ONGC??

0 Answers   BRML, ONGC,

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explain Cascade Control strategy with the help of a block diagram. also exlain its working in a distillation column

2 Answers   ABB, Sabic,

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What is the difference between uv and ir scanners? and what is the workig principle of both

0 Answers  

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1. What means HART communicator / where it is used / how to use it? 2. Types of Thermocouples and its temperature ranges / output of thermocouple? 3. Types of RTDs and its temperature ranges / output of RTD? 4. Idea about Temperature Transmitters? 5. Difference between Analog and Digital signals? 6. Difference between “2 wire” and “4 wire” system / instruments? 7. Difference between “Potential” and “Potential free” contact? 8. Types of flow meters / transmitters? 9. Types of level transmitters? 10. Difference between “Power/Control” cable and “Instrument” cable? 11. What means “shield” and “screen” in cables / how it is useful? 12. Draw a schematic of closed loop circuit of flow / level / pressure / temperature? 13. Idea about calibration of Control valve / positioned / I/P? 14. How to bypass a digital/analog signal in PLC/DCS by hardwire and software?

6 Answers   JSL,

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What is feed factor and its Importance in cement industry? How we can solve feed factor?.

0 Answers  

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what is the diffrence between pressure safety valve & pressure relief valve....pls

0 Answers   Oil India,

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Draw a 3 element level control loop and explain

1 Answers   CCIE,

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Why are the uses 24vdc in industries

0 Answers  

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wat are the interview questions asked in air india for post service engineer

1 Answers   AirIndia, Shree Renuka Sugars,

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why two probes are used in turbine flowmeters?

2 Answers  

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