Instrumentation Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Instrumentation Interview Questions

Questions Answers Views Company eMail

if we mount flow tube in arrow direction then flow comes in negative & if we mount it another direction then flow comes positive,So what will be the problem

2 4751

if tx. dp increase or decrese what happend in the reading

BSP,

1 5032

how can calibrate vacume trasmitter by HART COMMUNICATOR ?

Bajaj, IMECO,

3 7306

What's the difference between cold loop test and hot loop test?

5 43313

Can we calibrate an actuator?

Siemens,

5 12376

What is Cu-100 and Cu-1000 ? and tell me its application ?

2 6683

why we cant transmit the dc current easily

1 5072

What is the Temperature Co-officient of Resistance of PT- 1000 and PT-2000 ?

Adani, Birla, MEIL,

2 9208

Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

SCS,

2 7027

ABB DCS (AC 800 M)redundency take howmany milliseconds to switch from master controller to slave?should be less than DCS scanning time?

SCS,

2 6147

A DP Endress and Hauser flow transmitter is always tripping pump at low flow. set point is 74 cubic meter/hr. Thorough impulse line flushing and zero calibration has been done, yet problem persists. What do you think is the problem and how do you rectify this fault?

5 7890

how works encoder in plc

2018

Explain the usage of the PLC system?

3 6518

Explain the difference between the types of input variables plc?

1 4735

Is an analogue only transmitter as accurate as a smart transmitter?

SCA,

2 5004

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Un-Answered Questions { Instrumentation }

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

1834

How is work 5/2 sov?

1824

What are different types of control valves?

1526

Galvanizing.

1905

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.

2119

protection relay watchdog contact operation?

1912

Explain operation of Haskel pump.

2071

Isometric drawings are generated during _________________ phase of a project

2034

How d.p. Transmitter can be applied to close tank?

972

How to Calibrate Flow Switch in field

1205

how the arrangement of equipments done in control room

1958

Where is wet leg is used?

1012

please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...

1933

I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID

2714

How to fix back the valve actuator stem

1999

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