Answer / abdul

Positive feedback is giving some amount of o/p to i/p in
phase.Whereas Negative feedback is giving some amount of o/p
to i/p with 180 degree out of phase.

Answer / farooq

what is diffrent between smart and hart communicator

Answer / scheau vlad

The positive feedback is when in control room, at console,
operator recive correct all signals from field durring loop
check.
The negative feedback is when he don`t recive some of the
signals, for example testing one control valve with limit
switch, he dont see in the console the indication of the
limit switch.
I hope is usefull answer :)

In your own words, would you expect an ultrasonic level device to work better in a pressure vessel with a high pressure or a strong vacuum, and why?

1 Answers  

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Sir i am preparing for PSU exam for ONGC but i am not able to get the appropriate syllabus and previous year question papers. Kindly send me the same, that will be a great help from ur side. OR if anyone can plz send me the papers and syllabus please.

11 Answers   Bhel, GAIL, IOCL, ISRO, NTPC, ONGC,

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What are Sinking and Sourcing IO Cards

2 Answers  

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how u calibrate sox nox co2 co in cemps?what is opacity n HPm?tell the standard parameters of cems?

0 Answers  

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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.

0 Answers   MNC,

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Describe the function of Accumulator into the Pump

0 Answers  

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hello i'am samad.Any one Can help me! How to calibrate Vaccum Transmitter DP Type range 0 - 50 mbar abs by hand pump calibrator.

4 Answers   Bharathi Cement,

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this site is owned by an nonsense

0 Answers   Bhel, Prolific,

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On LPG sphere tank we used LIT for level indication.High side port is connected to the bottom of the tank while low side port connected to the top. I would like to know how to fill the glycerin on its low side with two condensing pot installed,one from top and the other one for its drain line.Please I need your expertise...thanks

1 Answers  

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is motorized valve closed when power shutoff?

0 Answers   Unilever,

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Explain the burnout feature.

0 Answers  

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What is the difference between PLC and DCS?

4 Answers   Honeywell,

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