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

 1562

Reasons for using seal pots:

 1 3872

Definition of reverse and acting controllers:

Monnet,

1824

Thermocouples work as follow:

Dashen Brewery, Tata Power,

1 2763

An RTD is a_________________________.it works as follows

 2 4247

Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows

 1645

two common seiling liquid used in seal pots are:

Thermax,

1 3178

The DCS stand for________________________. it is composed of the following major components: a:______________ b:______________ c:______________ d:______________

 2 4361

The DCS has the following signal type:

 3 5589

Reasons for using current as signal

 1 4114

Functions of electropneumatic valve positioner:

 4 6305

we re giviang 24v supply to transmitter and we getting output from tx?now my question is wht we call this complete proces?

 2 3708

in i/o panel for digital ouput(do) how much power(in volts) we must give?

 2 3872

what is working principle of presure and temperature guage?

 4 33142

What is Fieldbus?

NSL,

3 7709

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Un-Answered Questions { Instrumentation }

What are the charcterstics of a P&ID controller block for Governor speed raise or lower for a load sharing functionality between 4 Gas turbines in droop mode.

2495

How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

1632

which type inter lock use in petrochemical refinery,and oil & gas?

2629

What is furnace draft control?

634

What is force balance principle? State some of its’ advantages.

708




Difference between dcs and plc including date processing and architecture.

618

What is 3 element control system

1012

what is 24vdc live and dry supply

1814

i hav applied for the post of engg. in iocl so please require the past test papers fro instrumentation engg please please help me and send me the papers or tell me the pattern and type of ques asked in examination......

1570

what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?

2070

how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?

3194

How to Calibrate Flow Switch in field

759

Why upper weighing limit of electronics balance is 90% of the total weighing capacity?

1666

why orfice is not used for main steam flow calculation

1601

How many are the types of instrument cables in terms of No. of pair.

1702

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