Instrumentation Interview Questions
Questions Answers Views Company eMail

how to check control valve was passing?how to check online?

3 11695

in my plant 100% feedwater control v/v is air to close but due to instrument air fail,the valve opens but instead of drum level high its get tripped in low low drum level.the urv of level tx is 0 and lrv is -800.pls tell me the reason. for such behaviour.

Sirpur Paper Mill,

1 3560

䑰ҕ䔈ҕ䖠ҕ䘰ҕ䛀ҕ䝐ҕ䟐ҕ䢐ҕ䥐ҕŹ

1545

䑰ҕ䔈ҕ䖠ҕ䘰ҕ䛀ҕ䝐ҕ䟐ҕ䢐ҕ䥐ҕŹ

1530

i have height of stem drum level 1000mm.how i calculate the DP transmitter

2 8432

i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.

OEG,

1515

what is the output of conductivity sensor and PH sensor?

3 6512

what is the zero and span trim?

2 12607

How to check loadcell working or notworking

2 6943

why is an oxygen sensor used in a boiler stack

HCL,

2 6288

HOW DOES SPECIFIC GRAVITY AFFECT LEVEL MEASUREMENT.

3 9799

what5 does intrinsically safe mean.

2 4446

what is a device net.

1 3292

What are the two states of a controller

3 5411

What is the exact output of eddy current proximity probe? For vibration mesurment?

2 4825


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Un-Answered Questions { Instrumentation }

I need to know steps to Calibration Valve Guard......

1001


Q1]IF THE RANGE FOR FLOW IS -35 TO 125 WHAT WILL BE THE SPAN FOR ABSOLUTE AND FOR NORMAL? Q2]HOW TO CALIBRATE CAPILLARY TYPE LT? Q3]HOW MANY ERROR CALCULATIONS ARE THERE USED IN PROCESS INDUSTRIES? Q4]HOW TO CALIBRATE TEMPERATURE TRANSMITTER? Q5] HOW TO CALIBRATE LEVEL TROLL AND HOW TO CONNECT? Q6]PLEASE TELL ME THE BASIC FOR INSTRUMENTATION WHICH IS APPLIED FOR CALIBRATION AND FOR ALL? PLEASE MAIL THE ANSWER TO honest_yes@yahoo.in

1563


How a conductivity sensor & analyzer work at boiler, whats the principle & science is beyond this,How conductivity sensor sence & convert signal & move toward analyzer & analyzer show reading in percent? also what is temperature compensate option in conductivity analyzer

2320


In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.

2501


How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?

1607






what is the different between deflection type measurement and null type measurement in RTD?

1461


how to turbine speed measurement?

1170


I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann

1894


How to Calibrate Radar Level Transmitter in Field

741


In apron feeder how TPH is calculated?

1193


how to commission furnace ( water heater)

1520


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

752


why I need valve guard and whats different between guard and positioner ??

889


what would be the minimum flow rate that we can measure on rotameter..?

1633


what is 24vdc live and dry supply

1825