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Instrumentation Interview Questions
Questions Answers Views Company eMail

How much flow is passing through 6 inch line? There are no gauge, no any transmitters in line.

 3 5209

What is megering????

 2 13884

waht is difference between pressure transmitter and transuducer

Gasco,

4 6307

There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?

 1440

what is input and output cards of plc needs to be hot swappable mean

 1 4773

why magnetic flow meter is not used in thermel power plant operation

JK Paper,

2 5631

How does milli volt is created in themocouple?

Jaypee,

2 5111

How does pyrometer works?

 1 6283

Why we are using temperature and pressure as a reference when measuring flow of steam?

Shell,

4 7701

What is Process portal A(PPA)?

ABB,

1 4965

How Many Slave Can be used in one slave ?

 2 4354

what do you mean by cathodic protection?

Saipem,

1 4943

what is Best Among SINK Or SOURCE Type Design In Digital Signal, Either Iput Or Output? WHY?Can any one..

Accer, Reliance,

1706

what is the difference between transmitter and smart transmitter ?

Aditya Birla,

4 7653

what is loop folder?

Bapco Bahrain Petroleum Company, Hyundai,

1 24540

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Un-Answered Questions { Instrumentation }

What is force balance principle?

687

please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...

1503

how 3 out of 2 Logic/interlocks works? give brief explanation with help of diagram.

1833

A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

1779

What is standard of DCS panel design?and what is step of DCS panel design?wiring and type of connector(screw or DB connector)

1705




What is the procedure of calibration of Load cell?

1477

What is the principle of capacitance type level transmitter?

665

what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

1491

How is flow measured in square root?

668

1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?

1665

PT RTD Range: -200 to 500 degree celsius If I configured in DCS Lower range and Upper range . In face plate it shows red colour due to overa range how was the characteristics look If the temperature is more than operating range. how was the characteristics look . whether its in Resistance vs Temperature curve is Linear or Non linear

1525

Why mmwc unit is used?

753

What is Droop? What is Step/Gradient Limiter in Turbine Governor control?

2907

you are on site,the plant trips,you are approached by operations,what do you do?

1744

Explain pH, Conductivity.

1683

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