Instrumentation Interview Questions
Questions Answers Views Company eMail

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

Jindal,

1909

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

Samsung,

2310

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..?

2 4967

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

2116

Basic working principle of control valves

1 2053

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?

Process Control Technologies,

1835

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?

Process Control Technologies,

1 1829

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.

Process Control Technologies,

1 3959

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?

Process Control Technologies,

1 2010

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

Process Control Technologies,

1651

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?

Process Control Technologies,

1 3508

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

Process Control Technologies,

2614

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?

Process Control Technologies,

1710

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? 

Process Control Technologies,

1705

What is shielding effect?

Process Control Technologies,

1747


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Un-Answered Questions { Instrumentation }

what is the difference between profibus and controlnet networking.

2575


what are the steps I have to deal with?

1739


POSSITIVE PULSE IS APPLIED TO AN INVERTER INPUT.THE TIME FROM THE LEADING EDGE OF THE INPUT TO THE LEADING EDGE OF THE OUTPUT IS 10 ns. THE TIME FROM THE TRAILING EDGE OF THE INPUT TO THE TRYLING EDGE OF THE OUTPUT IS 8 ns. WHAT ARE THE VALUES OF tPLH and tPHL?

1750


Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?

10392


Calibration procedure for water rotameters

1742






In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

1370


how to do dynolab wind speed sensor loop test, how to simulate value,i have simulate mA 4-20mA but not responding in DCS faceplate, please kindly advice me any one.

555


Reason for capillary type dp level transmitter fluctuation

1506


what is the difference between scaler and vector drive

1655


What is 1:1 redundancy ?

1871


Which tank weighing system is better to install (Accuracy point of view) 1) Tank weighing system with 3 load cell or 2) Tank weighing system with 4 Load cell

734


what is insdustrial vibration.who it works. give atleast 2 types of insdustrial vibration

1557


IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?

1749


What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?

1530


what is IEC code in cables & how to selecting cables?

1282