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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 18181

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

Emcure,

1668

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

 1 3613

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 9694

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

 3 5908

on which principle control valve works?

Lupin, Reliance,

3 10213

what is differences between singal acting and double action valve

Carlo Gavazzi, Welspun,

1 6529

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

 10 10388

why is not useing in boiler skin thermocople

KNPC,

1 4531

how to explain PID?

Jindal,

2 5290

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

 1924

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

 1 3763

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

 1632

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

Emirates,

2 23267

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

Wartsila,

8208

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Un-Answered Questions { Instrumentation }

How to calibration a control valve?

699

1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?

1775

How many types of sensor

1161

why we r opening HOT BYPASS valve during startup of a compressor?

1598

IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?

1762




Calibration procedure for electro magnetic flow meter

1536

How is work 5/2 sov?

1382

I need to know steps to Calibration Valve Guard......

989

How u measure the massflow in orifice flow measurement techniques

985

Hi i am aneesh, done btech in applied electronics & instrumentatiin. And then i took mba in finance & marketing.After that i got placement in finance co and worked there for 3.5 yrs.Now i wanted to come back to engineering job.But without engg experience, i may not able to find an opening.i have done a course related to flow meters and ite calibrations. Kindly suggest where should i try to get a job?

1535

what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail

1319

What is three element in drum level?

923

Explain signal isolator

755

i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.

1504

Why trim span ? How?

1080

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