why we require Differential pressure?Why we use Orifice Plate?

3 Answers  

---

how many types of orifice plates?and explain about it?

2 Answers   Kesoram,

---

what is seebeck effect?

7 Answers  

---

What is the different between of rtd and thermocouple ?

6 Answers  

---

Exapain Deatails of the PID controlller

4 Answers  

---

any body please send me the old question papers of ongc test.

0 Answers   NTPC,

---

describe flow nozzel principle?

0 Answers   SEWA,

---

IF TX SHOWS SLOW RESPONSE, WHILE A CLOSE LOOP AND WHEN WE PUT THE CONTROLLER ON MANUAL THE PROBLEM RECTIFIED, SO WE CAN SAY THE PROBLEM IS IN

1 Answers   IFFCO,

---

can you tell me how many stages in steam turbine of 10 MW power plant

2 Answers  

---

what is the difference between RTU & MTU in SCADA system?

4 Answers   Bosch,

---

Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

0 Answers  

---

What is mean by Adapter block and net block?

1 Answers   Hospira,

---