Instrumentation Interview Questions
Questions Answers Views Company eMail

what is the diffrence between plc&dcs

HCL, Hindustan Zinc,

4 8203

what are the basic instructions used in simatic s7-300 plc?

Dr Reddys, HZL, Siemens,

5 9575

What is the deffernce bet. Instrumentation and Electrical Enginerring?

1 3913

How many types of Control Modes in process control, plz tell me all.....?

2 10369

purpose of absolute ppressure transmitter applcation?

1 4247

difference b/w single acting and double acting actuator by using application only?

McDermott,

2 37312

what is absolute pressure and where use in process?

3 7518

i have one tank of 500mm height, which is in under vacuum of 735 mmHg, I want measure level of the same using DPT , SO WHAT WILL BE THE URV & LRV, DENSITY OF THE TANK FLUID IS 0.95. is there necessary to fill the LP side with fluid.

7 14559

WHAT IS THE DIFFERENCE BETWEEN A TRANSMITTER & A SMART TRANSMITTER.

8 39843

what is Potential free contact? where it is used?

Engineers India Limited,

3 30504

how to calibate level transmiter ?range -150 to +150.what is the zero and span?

1 6655

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 10645

can any one pl explain me in brief that how we select the leakage classification in valve,means for liquid or gas there is any standard for selecting leakage classification or its depend upon valve size or any any other parameter.

3 4699

Foe selecting control valve if i have the min,normal & max data of flow rate,inlet pressure& outlet pressure,inlet tem.&density than how can i assure that these data are correct,pl. let me know if therew there is any method to check it.& also how we assure that the Cv we get from this data is suitable for valve for controlling require flow.

HPCL,

3 7112

Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com

IOCL,

1685


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Un-Answered Questions { Instrumentation }

what is effect of specific gravity in differential level transmitter , explain formula related with this .

1225


If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

1828


what is the criteria to decide conductor size of a cable ?

1281


how to measure draft pressure in transmitter pl. give its single line digram

1521


Why thermo wells are used? What materials are used in thermo wells?

654






if in a level tx height is given, how u calculate the ranges of the tx?

6384


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.

1685


Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?

1346


What types of Instrumentation Related Questions can an Interviewer ask in a Telephonic Interview ?

2047


i am having information technology branh ....... can i prepare for psu exam

1733


pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.

2665


plz send me general of ongc

1538


Derive capacitance to 4-20ma conversion formula / relation in capacitance type pressure sensor?

1763


centrifugal compressor interlock? Tell me the parameter at which compressor will trip

2682


what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

4400