Instrumentation Interview Questions
Questions Answers Views Company eMail

tell me the field & lab calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter, temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue),

1897

control modes

Vedanta,

1 5132

What is deffrence between Battery and capacitor

Siemens,

3 7990

What is micromotion transmitter? What is the porpose of using this transmitter?

Samsung,

2 6325

how many type of control valve?

10 27216

why use 4-20mA in the field of instrumentation?

8 26829

what is the difference between two wire transmitter and 4- wire transmitter

3 19490

what is the working principal of pribe

1917

What is 1:1 redundancy ?

1971

why 4ma show higher zero ? i have transmiter flow renge 0-1000 m3/h but 4 ma show in monitoring 200 m3/h and 20 ma show 1000 m3/h i want when 4ma show 0 m3/h and 20ma 1000m3/h

3 5320

What is the minimum rating availalbe for weld neck orifice in market?

Jindal,

1635

What is eddy current? Describe the operating principle of proximity probe.

1837

In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

1 4716

In oil & gas industries and petrochemical industries, there are classification of zones like zone 0, zone 1, zone 2. Is there any differences in voltages or power supply supplied for the process instruments, control instruments depending on the zones

1 9835

For an Instrumentation Engineer, is there any effect on Instruments of safety zones like zone0, zone1, zone2. As an instrumentation Engineer, what we have to consider or remember while working in these areas.( zones 0,1,2).

1 3838


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Un-Answered Questions { Instrumentation }

Name different parts of a pressure gauge.

742


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

2257


HOW CREATED LP & HP PRESURES IN DRUM FOR DRUM LEVEL MEASUREMENT!

1523


Valve positioner and actuators in detail.

1455


Square root calculation for dp flow transmitter?

759






how do calibrate the valves.. with clear manual

1663


What is the function of solenoid valve in on/off & shutdown valve and why it is not used in control valve normally?

1637


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

1617


In turbine, what does term CDP, NI, NH, HSSOC, means

2288


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?

1823


How hart protocol can be connected with control valves?

681


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?

1639


what is the difference between attemperator and desuperheater ?

5099


What is instrumentation control?

734


What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?

3094