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Instrumentation Interview Questions
Questions Answers Views Company eMail

What is heating effect?

Process Control Technologies,

2349

Why is the length of cable layyed from RTD to temp. Transmitter should be minimum? Why does heating effect takes place in their?

Process Control Technologies,

1 6288

Why do we use triad cable for RTD to Temp.transmitter connection? Why we don't use 3 core cable?

Process Control Technologies,

1 15010

What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem? 

Process Control Technologies,

2496

Why do we have earthing cable in branch cable and shield in the same cable?

Process Control Technologies,

2603

Why 1-5 vdc a standard?

Process Control Technologies,

1 7837

Hello Friends do you know this answer of this Question? Which color you would use when there is Somthing not correct or need to change In P&ID? i mean color that use for highlight that need to update in P&ID. Yellow Highlighter ? Red color ? Blue Color ? Appreciate for your answer. Thanks Blue Color

2 6002

what is all types of analyzer in water production plant?

Marafiq,

1 3246

flow transmitter formula?

BEMCO, Siemens, Yokogawa,

2810

Flow tax range 0 to 100 mmh2o ,flow rate 40 tons /hr, I want change flow rate example 42 tons/hr so tx range ?

2 4517

Describe how to use megger to measure the earth resistance and insulation resistance

2233

why we use the 4-20 mamp signal used for transmitter.

Tecnimont,

5 10749

Boiler flame scanner working principle?

Bhel,

1 7178

Why boiler chimney area  oxyden sensor fixing? 

NTPC,

2476

How to calculate flow of air bubbler type level transmiter  According hight and density 

Qatar Petroleums, RKS,

2 5769


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

how works encoder in plc

2075


What is the difference between modbus,fieldbus & profibus

2420


what is easiest way to read STL language in PLC?

3135


what is the responsibility of an instrument commissioning supervisor

3155


TEMPERATURE VARIATION FOR FREQUENTLY.

2046


draw shematic diagram of c/v positioner(smart type)?

2220


Can u tell me the principle of the tc,rtd,level switch,pressure switch ,transmitter(pr flow level temp.),vibration...plz

2055


how to convert cubic metre per hour to newton cubic metre per hour

2006


full process of gas turbin?

2103


I want to know about DDCMIS in detail ? please explain it. Also give name of reference books in which it is explained in detail in very simple manner.

3827


How to convert Differential pressure to flow in TPH

2234


What is instrumentation instrumentation engineering?

1100


the output of the common trasmitter protocol in qatar gas are the following

2012


Regarding , there is an air cooler which control the fans(50% of AV FANS) by temperature in outlet , and the louver of Air cooler is controlled by HIC from control system , So if on Air cooler we will consider 2 individual I/P converter or positioner?

1762


explain key exchanges in all security modes WPA,WPA2,TLS?

2046