Answer Posted / nvr

Hazardous Area Classified based on following specified
criteria.

1) Characteristics of material ( Like Toxic, flammable).
2) presence of Material surrounding the atm.
3) Risk Rating.

How an rtd work, and what volts/current goes to a rtd to measure the resistance?

1327

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

2190

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How to fix back the valve actuator stem

2113

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1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

2735

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Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

1931

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all questions related to instrument technician in any offshore oil and gas company.

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hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....

2645

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In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

2127

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Boolean algebra

2234

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what is instrument philosophy

2329

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Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...

2394

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The Design Calculation of Level Transmitter For Different Structure open & Closed Vessel, Eg. Diff. Level Tx., Capacitance For Continous Operation

2898

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What is intrinsically safe system?

1200

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What is the constant voltage unit?

1133

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in mass flow meter what is drive friquancy ?

2153

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