Instrumentation Interview Questions
Questions Answers Views Company eMail

What is instrumentation control?

657

Explain types of valves?

674

Why plc require in analog input 4-20amp & 0-10 volt?

632

What is the difference between mmwc and mmwg?

870

Explain the difference between mmwc and mmwg?

3593

Explain why use mmwc unit?

640

What are the types of valves?

625

Where is wet leg is used?

647

Explain the difference between differial pressure & delta pressure?

1 861

Define cryogenic?

730

Explain why plc require in analog input 4-20amp & 0-10 volt?

629

Explain the difference between plc and cnc?

572

Explain the key components of control loop?

580

WHAT IS THE CAM POSITION IN CONTROL VALVE POSITIONER ? WHY IT IS USED?

557

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.

572


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Un-Answered Questions { Instrumentation }

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?

1765


Specify for Cables - Flame Retardant and Fire Resistant?

1644


what is sil (safety integrity level

2212


What is the cascade control

996


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

999






what is the difference between scaler and vector drive

1676


Instrumentation symbols interpration, P& ID, Logic diagram analysis, Electrical drawing analysis.

1499


Why flow/pressure transmitter before control valve?

1068


Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

1783


What is eddy current? Describe the operating principle of proximity probe.

1767


what is cold loop? difference between hot and cold loop?

1746


Explain pH, Conductivity.

1704


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

1560


How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

1638


Difference between ultra sonic flow meter

1564