Instrumentation Interview Questions
Questions Answers Views Company eMail

how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???

Siemens,

2002

how can be connected thermocouple in series?what is the need?

Hindalco,

2 8336

What are all the type of vibration measurement measuring in turbine, what is the output of vibration sensor.

3 6105

What are the instrumental diagram of valve.

Karnataka Power,

2 5815

How we are deciding while programming in pid controller , What we are using heating or cooling.

1 3525

What is the relation between electronics & instrumentation

2 6704

What are the charecterstics of control valve.

2 5252

What pressure transmitter.

1 4570

Calibration procedure for electro magnetic flow meter

1528

What is the function of a diaphagram

5 7410

Why we not use 2-20Ma or 1-20Ma

5 6703

What are three main programming in PLC

5 7321

What are different type of instrument cable

KOC,

1798

What is passive connection of instrument in different type of I/O module

1 2291

What is meant by calibration

5 7037


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Un-Answered Questions { Instrumentation }

How to check vortex flow meter is in good condition while we do not having calibration setup?

7501


we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

1281


what is the difference between attemperator and desuperheater ?

4979


Calibration procedure for electro magnetic flow meter

1528


Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

926






What is cut off relay? And why use in PLC and DCS?

940


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.

1684


What is ultrasonic flowmeter?

633


What are the interlocks we have to check during the start up of LP/HP compressor?

1485


Explain how thw analog to digital converter works with the circuit diagram

2176


Why trim span ? How?

1076


Explain about the leakage class of the control valves

1592


How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System

662


How to calibration a control valve?

697


Identification of ss fittings, pilot valves, relief valve.

1385