Instrumentation Interview Questions
Questions Answers Views Company eMail

1.how can calibration temperature transmitter and flow transmitter? 2.

Gulf Jobs,

450

Why we using 250ohm resistance during lab calibration and why not using in field in one plz define deeply???

Cisco,

1 1000

How to convert milliampares into flow??

586




pt range is -45 psi to 45 psi.friends can you give answer with calculation and with linerity scale like 0%,25%,50%,75%& 100%?

WB,

1 655

Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system

447

Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

542

How to calibration coriolis flow meter?

571

How to regulate the flow of Air in 4" line, with max flow of 330 nm3/hr and Pressure of 0.5 bar? please suggest the type of instrument required.

437




What is re-latch the manual trigger in solenoid valve

Valvitalia Systems Division,

590

What is paid how it works

KOC,

439

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

474

I have 0.75mm sq multicore cable (IS type) , can use instead of same type but 1.5 sq mm cable ? Note : The distance is around about 150 meter.

460

How to calibrate H2s Dectector

KOC,

491

How to calibrate smoke Dectector

KOC,

425

what is SIL 1 2 3

KOC,

663


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Un-Answered Questions { Instrumentation }

How we calculate orifice plat size???

305


For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.

862


What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?

1008


what is Best Among SINK Or SOURCE Type Design In Digital Signal, Either Iput Or Output? WHY?Can any one..

1023


WHAT ARE THE INSTRUMENTAL DIAGRAMSOF VALVES?

991






what is the usage of QDV & VOLUME BOOSTER

1082


Draw a wheatstone bridge circuit showing supply, meter and 3 wire RTD connection

887


how many types of spped sensors n vibration sensors?their basic principle n connection?

1374


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

1289


Describe a time when you anticipated potential problems and developed preventive measures.

1764


Can I calibrate the Electromagnetic Flow Meter on line and How.

738


A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

1049


Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

542


Calibration procedure for Electro magnetic Flow meter

3371


why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

1126