Answer / beninst

the barrier is used in hazardous area.to prevent spark explosion in case of gas leaking.

Answer / joe

Zener Barrier is used to avoid the the spark explosion in hazardous area

Answer / hiren

Intrinsically safe barrier use

the 3 most common transmitter protocol being in refinery or qatar gas and aramco.

0 Answers   Shell,

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I want to know about DDCMIS in detail ? please explain it. Also give name of reference books in which it is explained in detail in very simple manner.

0 Answers  

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WHY WE R NOT USING THE TURBINE FLOW METER IN THE STREAM SERVICE ? pl explain?

3 Answers  

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What is surge and how is it prevented.

1 Answers   ADMA OPCO,

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What is full form of hart communicator?

2 Answers   KOC, UPL,

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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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What is the full form of PMMC ?

7 Answers   DVC,

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Can we use mov instead of esdv Explain the reason

1 Answers   KOC,

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How to calibrate an pressure gauge with yantrika test bench?

0 Answers  

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If the vibration probe near to the shaft,then output voltage will be decreased r increased?How?

1 Answers   Amtek, Hamsco, IJT,

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Explain an adaptive / self-tuning controller’s major draw card.

0 Answers  

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What is difference b/w absolute & gauge pressure? EXPLAIN

2 Answers   IFFCO,

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