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Instrumentation Interview Questions
Questions Answers Views Company eMail

I have got a call of IOCL interview for projects having 2yrs experience. What sort of questions should I expect in the interview?

IOCL,

1525

why we use 4-20 mA to do calibration of the instruments.why we cant use 0-20 mA?

Emerson, IEM,

8 20259

diff c and c++

1 3667

Is there any temperature compenasation for the air flow from FD fan & SA fans which supplies air to the Boiler?

2 4960

We have ZR22G-100-S-A-E-T-T--E-A/CV/F1 Model Zirconia Oxygen analyser which is Yokogawa make. I kept the analyser in Flue gas path at Air pre heater area. My plant is 7.5MW Biomass power plant. For a particular fuel, Coconut Husk which contains Sodium and Potassium chlorides iam not getting proper reading, Analyser output always Zero. I calibrated the analyser and it is OK. For Other fuels like Wood chips, Cholam waste, DOB, Groundnutshells, Ply wood waste and all iam getting actual percentage of Oxygen. What is the main reason behind this draw back?

2 4890

Is there any interfacing sofware to build communication between a PC and ER300P model L&T make trivector meter via RS485 port which is available in the meter and is there any data acquisition card available to store the acquired data from the meter into the system

12 17151

any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

IOCL,

1792

i have calibrate rosemount make level transmitter , wht can i do ? my tank capacity is 30,000 liter

Equate,

9 14154

how can i calibrate E & h make conductivity transmiter . unit : mocro siemens Range :0 to 100 micro siemens sensor : capacitive type

1 4679

hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

1354

can we use flow transmitter instead of level transmitter?

7 8807

how manys ways dp transmitter can be calibrated having range of -150 to 400mmwc,what side pressure u will apply?

3 6644

how ranges is decided for drum level or dearator level,in my pplant i have seen for boiler drum range is -1000 to 1000mmwc, while for dearator -2000 to 0 mmwc ,why they decided to take this range ?

2 5972

If hart communicator provide 4-20ma source to any transmitter during the callibration?

Hyundai,

3 7573

How to work & calculated output of the Derivative action in pid controller (Explain Derivative controller)

1465


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?

1608


How to calibrate level transmitter with use of HART?

1983


what are the documents(Construction point of view for a process plant) submitted by contactor initially entering in to new site for client?

1578


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

1763


How to calibrate capillary type level transmitter

961






What is the constant voltage unit?

473


what is the difference between active & reactive power?

1513


How to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,

2550


i want to find out iffco get test paper

11878


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

1599


steps for installing orifice plate?

1193


in mass flow meter what is drive friquancy ?

1454


NPN transistor, SCR, Zener diode, LED, Varactor diode, Vortex meter, RTD, Resistor, Crystal

1578


1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

1885


what is performance test.need defination

1105