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Instrumentation Interview Questions

Briefly describe instrumentation job

1388

I HAVE GOT TYPICAL PROBLEM WITH THE TEMP.INDICATION. THE PROBLEM IS THE K-TYPE T/COUPLE OUT PUT IS CONNECTED TO A INDICATOR.THE INDICATION FLUCTUATES SOME TIMES AND SOME TIME IT IS STABLE. WHEN I CHECKED OUT PUT OF T/COUPLE THE MV WILL NOT VARY. WHERE AS INDICATION FLUCTUATES. WHEN I GIVE MV SOURCE TO T/COUPLE EXTENSIONCABLE FROM THE FIELD IT INDICATION IS STABLE. WHEN GIVE MV SORCE TO INDICATOR ITS INDICATION IS STABLE. PLEASE CLARIFY.

4321

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

2574

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

3234

How would i calibrate a new commissioned flow transmitter???

5206

WHY WE R NOT USING THE TURBINE FLOW METER IN THE STREAM SERVICE ? pl explain?

3716

1)how we calculate the drum level? and how we select the transmitter range?

7379

what are the steps to follow force a particular input or out put from ics triplex esd system?

1784

what is the function of a zener diode ?

5463

in which mode of the zener diode act when load voltage is approximately constant

2409

In thermocouple could we use the lug for termination or not,Thermocouple is any time,I am currently concerned with K type.please let me know if anybody know

7986

I am manjunath having exp in maintenance of chemical plants,know i want to do a design course INTOOLS,after doing design course can we get jobs in design field.sinve i dont have design exp..

892

what is mass flow meter principal?

GIL,

5657

Someone Please tell me what are the Pre-Commissioning activities in a Thermal Power Plant for an instrumentaion Engg.

1638

why is honed type flow orifice plate? what purpose it used? how to select this?

12115

What is profibus?

176

1045

Is it ok, to use non-contact type Radar type LT, on a tank that is half circular from the bottom side? If yes the, isn't the waves gonna bent in other directions?

1199

1175

what is wave length were using ?

972

Where are oxygen analysers installed in cfbc boilers? What are their usual readings?

677

in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?

2181

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.

1059

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?

1230

In apron feeder how TPH is calculated?

696

What happen if we install my pressure transmitter below the elevation of pipe in natural gas service?

165

Can anybody tell me how to select the size of earthing cable for DCS & PLC system.Please tell me any relevant answer here or mail it to me.

1223

we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.

1087

how many types of preheaters are in cement industry & what r they can any body explain?

838

Explain the working of an electronic level troll.

167