Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / guest
permanent magnet moving coil
| Is This Answer Correct ? | 13 Yes | 2 No |
Post New Answer View All Answers
how to tune siemens sipart electro pneumatic positioner..plz tel me..
What are the type of bonnets in the control valves?
how works encoder in plc
what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?
Draw symbols of the following :
How to calibrate Field bus transmitter? procedure ?
What is hp & mp seperator .& what is its working principle ?
TECHNICAL/ARTITUDE
How would you choose differential range?
defination of radial vibration?
What is motion balance principle?
i need some objective type questions in instrumentation
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.
What is cut off relay? And why use in PLC and DCS?
hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....
