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Instrumentation Interview Questions
Questions Answers Views Company eMail

Somebody ask me how many size of control valve what is mean of control valve size?

2 3821

what deference between panel earth and systemearth



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.


What is input and output of vaiberation transmitter and what is its unit.


4 6817

What is input and output of plc & dcs

2 4227

What is TMR

3 7579

Where are use of pressure,level,flow switches?and what is input and output

3 5445

What is differnece between leveltroll and interface leveltrol?

2 4924

How many types of sensors are used in instrumentation & what are names


1 2647

What types of thermocuple are mostly used?

6 7736

(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.



What is the purpose of LO overhead tank in turbines.


1 1976

what is the usage of QDV & VOLUME BOOSTER



what barrier is used in process industry.

ADMA OPCO, Process Industries,

3 5154

what is meant by cold junction compensation. where it is used.


1 4957

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Un-Answered Questions { Instrumentation }

Why do you want to work here


How to Calibrate Temperature Switch in field


please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826


NSV type probe stands for


please send the drdo exam paper


Name different types of bourdon tubes.


god evening sir i am studying & i elegible to all industies


key phaser where is use and work


How to calibrate level transmitter with use of HART?


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?


what is effect of specific gravity in differential level transmitter , explain formula related with this .


Why grounding is necessary? Give example with diagram.


why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.


how to measure draft pressure in transmitter pl. give its single line digram


For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?