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Instrumentation Interview Questions
Questions Answers Views Company eMail

what is the difference between E/P positioner and I/P positioner in control valve , in which application the respective positioner are used in.

ABB,

1 5666

Which is your favourite subject & explain any one topic of it.

L&T,

8981

Which topics are covered in Process Control?

Honeywell, L&T,

1629

Explain PID controller tuning & any one method used for it.

L&T, Oil India,

1 6986

Tell about your IFFCO plant visit.

L&T,

1634

Explain Three way boiler.

L&T,

2 6367

Draw bode plot of any transfer function. Why is plotting bode necessary?

L&T, STS,

1857

Explain any simple temperature control system.

HGJ, L&T,

3 7580

i want to calibrate a transmitter in the range of -100 to 300 mmwc. How it is possible to measure -100 to 300?.

Hindalco,

2 4721

what is the difference between mmhg & mmwc?. i want to calibrate a transmitter in the range of -100 to 300 mmwc. Which is the reference for calibrate the Tx,if mmwc not available?. Is it mmhg or mmho2?.

UPL,

3 45604

What are the two program execution modes of PLC?

 4 7257

What are Sinking and Sourcing IO Cards

 2 6371

why using negative supply for bentley nevada vibration system ?

 1700

in transmiters(rose mount) how to check output 4-20ma ? and input 24v? i need exact explanation?

Adhunik,

2 6670

what is diff b/w neutron and ground?

 3 5512

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Un-Answered Questions { Instrumentation }

Explain pH, Conductivity.

1683

Explain bernoulli’s theorem. State its application.

669

NSV type probe stands for

1957

How hart protocol can be connected with control valves?

590

few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters

1593




pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.

2654

what is the difference between magnetic flow meter and mass flowmeter

891

i need some objective type questions in instrumentation

4468

HI, can anybody give details about GAS TREATMENT PLANT CONSTRUCTION,as INSTRUMENTATION ENGINEER what are the responsibilites.what are the instruments mainly instrumentation engineer will deal with

1599

How digital input and digital output 's are working in dcs

2024

how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???

1995

How to calculate P,I&D value in PID controller ?

1607

What is the cascade control

981

What is heating effect?

1868

Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

4156

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