HOW THE ORIFICE & PRV SIZING BE HAPPENED -- EXPLAIN IN BRIEF
- 3 Answers
- 6930 Views
- I also Faced
- E-Mail Answers
Answer Posted / guest
orifice sizing according to L.K.Spink's orifice sizing formula.
| Is This Answer Correct ? | 1 Yes | 3 No |
Post New Answer View All Answers
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.
Why thermo wells are used? What materials are used in thermo wells?
Draw a group of instruments interlocked to a Pump & Motor?
the 3 most common transmitter protocol being in refinery or qatar gas and aramco.
Describe the typical instrumentation used in monitoring the performance of a shell and tube heat exchanger.
How would you choose differential range?
What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?
How many ohms are required for proper earthing?
Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com
Explain the use of hair spring in the pressure gauge.
How to Calibrate Flammable gas detector in field
1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?
How can a d.p. Transmitter be calibrated?
Area classification, Equipments, Gas groups, temperature classification, Ingress protection, Fire Extinguishers.
Can Any body tell me how to check Modbus Settings in ER300N L&T trivector meter?
