Answer / ahmed raja

basically there is no zero pressure in trems, but we say
guage pressure is considered as zero at open to atmosphere.
and Amospheric pressure is 14.7psi if we minus the
atmospheric pressure from guage pressure we got the
absolute pressure.

what is mean by process control?

4 Answers  

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give classification of transducer based on type of application

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I have one DP transmitter of range 0-500mmWC i have to calculate its range in M3/hr for flow measurement so whats the formula.

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You are looking at the RS-485-side of an RS-232/RS-485 converter and the power supply voltage for the converter is +5V. Under idle conditions (no transmission), and assuming you have enabled the RS-485 output: what would you expect at: (a) Output A measured against output B (b) Output A measured against ground (c) Output B measured against ground

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What is offset in a control system.

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Define magnetic flow meter and mass flow meter.

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installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

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WHAT IS TSI? HOW ITS WORK

2 Answers  

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send me last 5 years questions asked in rrb chennai, for section engineer

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what are the different types of communication cables used in automation and what are the difference in the cables

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difference b/w single acting and double acting actuator by using application only?

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ALL INSTRUMENTS WORKING PRINCIPLE.

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