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BARC Instrumentation Interview Questions
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sir, i preparing hpcl,ongc,barc,hal exams(instrumentation engg)pls send a placement papers

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Hi Friends i need Electronics&Instrumentation Engg question papers for BARC written test by coming 20th May 2008 pls post ur use full info to Or for suggestions pls give one missed call to 9962122264


hi friends,im an instrumentation and contol engg student,can u hlp me of suggsting barc written question paper,my id is, cel no.9563591747


why used three wire in RTD.

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1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement to design a v/i converter and i/v converter many type of thermocouple are there many leads are there in thermocouple measurement pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered a 10 bit counter ,which counter you will prefer to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method to design horse race counter including sensors and signal conditioning element 20.what is bevelling


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,


if differential pressure created by orifice falls below vapour pressure of liquid flowing through it what will happen

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What is the maximum distance limit of 4-20mA and 0-10V DC standard signal transmission ?

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What is open loop checking and close loop checking

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