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In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
1964(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.
4042Post New Instrumentation Questions
why we are using drum level control valve air to close?
What is the use of GMV in turbine?
what is interface level and how it is calibrate?
what is the electrical operation procedure for switching on 27.6MVA electric furnace.
why we use cascade control and feed forward control in 3 element drum level control measurement of steam drum .what is cascade and feed forward control system ?give example .
what about your moleg in pogrees with company
a flow transmitter [range-0-400mbar] connected in process line. please explain me how to calibrate the flow transmitter , & how to do static error
describe flow nozzel principle?
for oil & gas industries which zone is normally preferred? why? give its example?
what is isloted barrier how it works and what are the main purpose.how it make safe area.
can you provide me full detail about instrumentation in ONGC??
what is the difference between -24 : +24 & 0:24 and where it use?
what is sliding spool valves?
in sulfur process what is material of impulse line we use to connect with transmitter ? and does teflon affected by sulfur?
how pressurize drum calibrated ?
