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Instrumentation Interview Questions

How does work A temperature valve or fv control valve in process plz brief me

1723

Why rdt and thermocouple both give different output .and one things more, how to generate  ohm or mili volt  plz mail me merajalam143545@yahoo.com

2107

how to calculate static pressure in a pipe line,when we know the DP(differential pressure) in the line, area of the pipe? please any one tell me the relation between them..?

4648

how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw

1896

Basic working principle of control valves

1782

The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?

1672

If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

1563

If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.

3688

I have installed a RTD whose length is 2250mm(RTD stem length), but it's upper 200 -250mm is out of the reactor, and this upper 200mm stem is surrounded by atmospheric temp. And the lower portion i.e. 2000mm is in contact with the measuring fluid, then does the final measuring temp. Gonna change as the upper 200mm RTD stem is out of reactor?

1707

How does a single acting, spring return ball valve actually work? Does it require continuous air supply?

1492

In a ball valve which require 24v dc supply to operate, whose solenoid valve doesn't have any + or - indication, how can we make wiring connectionto solenoid valve?

3214

What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?

2334

Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?

1526

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?

1502

What is shielding effect?

1580

diff between neutral ,ground,phase , earthing and shielding?

1694

How the sizing of the analog signal cable is calculate?

1778

plz send me general of ongc

1381

how pressurize drum calibrated ?

1417

Explain about safety integrated level protection? . How it was differ from other protections ?

1105

Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com

2219

what is dc moter.

1600

Draw symbols of the following :

1363

Why the ammonia and Nitric Acid level indicators is with millimeter ? and What is the conversion form millimeters that level indicator indicate to weight ?

1047

why fuse block is not used for AI signal?

1231

What is the difference between mmwc and mmwg?

518

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

1417

Explain the key components of control loop?

433

What are the type of bonnets in the control valves?

1250

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

1864