Instrumentation Interview Questions
Questions Answers Views Company eMail

What is the working principle of oxygen analyzers(zirconium oxide type) used in CFBC boilers?

Bajaj, Kohinoor, Wartsila,

3 18149

Why upper weighing limit of electronics balance is 90% of the total weighing capacity?

Emcure,

1656

Why humidity limit is 30 to 55 % for raw material storage?

1 3597

Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

L&T, Siemens,

2 9656

if we put any thermocouple on a table in a room without any connection,what temperature should it show.

3 5886

on which principle control valve works?

Lupin, Reliance,

3 10172

what is differences between singal acting and double action valve

Carlo Gavazzi, Welspun,

1 6506

why do 4 mA serves as 0% not 0 mA?

10 10343

why is not useing in boiler skin thermocople

KNPC,

1 4502

how to explain PID?

Jindal,

2 5268

How to do gas analysers calibration in AUTO and Manually by using zero and span gas?

1914

In which principle Woodward Governor 505 work in power plant? What are the input of Woodward governor 505

1 3752

what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?

1620

how is a displacer type level transmitter calibrated.explain the method?

Emirates,

2 23243

please tell me what is a light up procedure of Cfbc boiler and what it's axuillaries of cfbc boiler?

Wartsila,

8194


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Un-Answered Questions { Instrumentation }

any one can send me instrumentation previous interview papers? I prepare for MNC Company Interviews? my mail id- Rakesh.Golla@dodsaldxb.ae , and another mail rakesh.gvk@gmail.com

1505


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

1621


Explain pH, Conductivity.

1683


how works encoder in plc

1573


what is Best Among SINK Or SOURCE Type Design In Digital Signal, Either Iput Or Output? WHY?Can any one..

1706






Why plc require in analog input 4-20amp & 0-10 volt?

615


what is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

1553


what are the values of fuel flow rate in various places in boiler.

1224


line up procedure for dp type flow transmitter?

1330


how to calculate signal cable sizing? and multipair cable sizing??explain in brief?

1892


what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

1489


In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

1368


How the sizing of the analog signal cable is calculate?

1972


what is basic difference between motion balance and force balance in pneumatic instrument?

8941


what is KV and XV valve

1283