Why we are using thrust bearing at turbine side?

3 Answers   Edac,

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Can a pneumatic control valve work without positioner?

4 Answers   SMC,

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Explain the working principle of lvdt?

0 Answers  

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what is the Instrumentation?

9 Answers   Gulf,

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WHAT IS THE VALUE OF MICRON

2 Answers  

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what is the difference between hub and switch?

6 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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What is live zero and dead zero

2 Answers  

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Explain types of valves?

0 Answers  

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Explain level troll principle & interface level measurement.

1 Answers   ADMA OPCO,

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what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 Answers  

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canu tell me why 4-20 ma and why not this 3-25ma?please give reason of this value.

6 Answers  

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