Answer / s

Based on the presence of flammable material
like hydrogen,acytelene,benzene.

If one or more flammable materials present ,it is hazardous
area.otherwise ,it is non-hazardous area.

Answer / 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.

What is TMR

3 Answers  

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why use squareroot in flow measurment by dp transmitter?

4 Answers  

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1)why we are using mostly Ultrasonic Flow meters to measure flow, rather than Radar waves? 2)why we are using Ultrasonic waves and Radar waves to measure the Level?

1 Answers   NTPC,

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How would i calibrate a new commissioned flow transmitter???

3 Answers  

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what do you mean by smart instruments?explain with example

4 Answers  

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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

0 Answers  

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Linear amplifier.

0 Answers   CCIE,

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hydrogen purity meter calibrating and commissioning procedure can be explained?

1 Answers  

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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......

0 Answers  

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who to convert dc to ac

7 Answers   ONGC,

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why we are using perforted cable tray for control cable and ladder tray for power cable

1 Answers  

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how to install Differential pressure transmitter in gas line.i need transmitter down side.

7 Answers   Rockwell,

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