Answer Posted / giridharan

in this question i would like to add up my ideas

actually this 4-20 ma is fixed because of the main purpose
linearity of its output we can check whether its dead or not .

please tel me the calibration of pneumatic controler.

1731

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Reason for capillary type dp level transmitter fluctuation

1517

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

1752

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key exchanges in wpa,wpa2,tls

1510

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give eg of how I/P is used in control loops

1498

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Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

1652

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In turbine what does term CDP, NH, HSSOC means.

1341

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Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.

1643

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Which topics are covered in Process Control?

1641

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Explain the working of rota meter.

763

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Definition of reverse and acting controllers:

1834

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tell me the field & lab calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter, temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue),

1801

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how pressurize drum calibrated ?

1577

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What is the use of single seated valve?

593

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for oil & gas industries which zone is normally preferred? why? give its example?

1564

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