Answer / guest

5Hz.This has a -20dB/decade fall off. the required gain is
0.001 or -60dB.Being third order filter, cut off frequency
should be 50/10 = 5Hz

Q-Explain the different load conditions that will produced different offset which may or may not be acceptable to thhe control function

0 Answers   Reliance,

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hiii.... can any one provide me previous years question paper of hindustan petroleum for instrumentation engineering???

0 Answers  

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suppose, after calibrating a transmitter we fixed it in a process line. At live zero condition the Tx shows 4.5 mA. what should we do to make the Tx show 4 mA? If we adjust zero, will it not affect the calibration?

4 Answers   ABG Shipyard,

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What is cavitation. what is the effect of it on control valve and how is it prevented.

1 Answers   ADMA OPCO,

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

5 Answers   Dr Reddys, HZL, Siemens,

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what is the diffirence between Earth and Neutral

4 Answers  

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what should be distance from tapping point to inallation place of instruments?

3 Answers   Tasnee Petrochemicals,

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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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how feedback signal frm rtd can be use for 2 purpose, i.e. 1for local monitoring and 2nd for controlling in dcs.so how many wired RTD can be used

1 Answers  

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what is diffrence between cascade & three element system.

3 Answers  

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What is the difference between antisurge

1 Answers  

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What does it mean 3/2 sov

5 Answers  

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