Instrumentation Interview Questions
Questions Answers Views Company eMail

what is the advantage of submersible level transmitter compare to ultrasonic level transmitter?

1622

It is desired to reduce effect of 50Hz pick up in a thermocouple measurement. If a third order LP filter is used for this, what should be its cut off frequency, if gain should be 0.001 at 50Hz.

Honeywell,

1 3196

What is sensitivity of K type thermocouple? Is polarity important in thermocouple connections?

Honeywell,

3 9449

How can one improve linearity of an RTD based temperature measurement system?

Honeywell,

2 6543

What is cold junction compensation in thermocouples? How is it achieved?

Honeywell,

4 9738

How does one detrmine the direction of movement of core in an LVDT?

Honeywell,

2 5671

What is an instrumentation amplifier? How is it better than a differential amplifier when handling outputs from a wheatstone's bridge?

Honeywell,

2 5899

How INtools is useful for routine Instrument maintenance?

1562

What are the problems faced while testing HART instruments?

SSC,

1 4147

please give me combustion cntrl interlock details? if possidle drawing also?for this one is there any website ?

1 3434

if drum level is low what is interlock? i mean we put interlock to fd fan or id fan ?

4 12012

suppose in dcs range of a flow transmitter is 10t/hr what is dp for 50% in 2500mmwc

Chevron,

6 11193

Waht is surge in compressors and how to control it?

DEWA,

1 3076

What is surge in compressors? How to detect and control it?

DEWA,

1 7189

what is procedure of calibration of remote seal transmiter, botom to top flanch 850mm, fluid liquid density .73, transmiter fixed on a fractionation colum, under vaccume 10mbar

4 6189


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Un-Answered Questions { Instrumentation }

how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?

1487


I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

1726


anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me

5545


Why do we floating DC in DC system.

2376


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

2062






Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?

1558


typical loop drawing of a simple feedback control comprising of one transmitter and one control

1560


I want to buy a seal kit of a pneumatic power cylinder.But I don't know it's specification.So please help me to know its specification.

1499


What is instrumentation measurement?

621


need to calculate flow rate with the help of dp range and orifice bore dia and size. range is 0 to 400 inwc and orifice size is 12 inch 150 # rf and bore dia is 7.180 inch. need to calculation for flow rate

878


can you send remote seal interface level transmitter calculation steps for oil water saperator.

2156


How the warning lamp of a charging-system is activated ?

2157


What is the right procedure for adjusting the gap voltage of bently nevada vibration sensor?

14393


hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....

2141


what is actual drum level and compensated drum level?

1767