Answer / Praveen Kumar Awasthi

In Distributed Control Systems (DCS), Analog Input (AI) refers to the devices that convert an analog signal into a digital format for processing. Analog Output (AO) refers to the devices that convert a digital signal back into an analog form for control or monitoring purposes.

cheapest instru-- PMMC, EDM, rectifier, thermocouple.

3 Answers   ONGC,

---

what are the diff. in servo and regulatory control?

1 Answers  

---

what is flow and flowrate? definate and diffrentiate it? pls post a valid ans thanks in advance

2 Answers   Qatar Gas,

---

hey any one got the papers of SAIL and HPCL plz do help me by posting them to my mail ID's naren07_87@yaho.co.in, surenarendra@gmail.com

1 Answers  

---

Q- Which of the following is Close loop system - a-)respiratory System b-)traffic light system c-)washing machine d-)Room heater my option is A, what is our take on option B & C

4 Answers   Sail,

---

what is function of SCADA , and how is it work, explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

---

What is the difference between fiber optic cable & Ethernet cable

2 Answers   BEMCO, CCC, Pidilite,

---

what is the calibration standard for pressure and differential pressure transmitters?

1 Answers   Thermax,

---

Yokogawa dcs normally where will change 4-20 MA to DC voltage( node or I/o cards?)

1 Answers  

---

What does threshold mean? what does tolerance mean?

1 Answers   DEWA,

---

why we use cascade control and feed foreword control in 3 element control of boiler drum ?what is feed forward and cascade control system ?

1 Answers   Visa Steel,

---

what is zero and span ?

1 Answers  

---