Answer / nitin.sonurlekar@gmail.cm

Orifice plate is a device used for measuring flow rate by  reducing pressure or for restricting flow or also used for creating Differential pressure.

OP types :
•    Concentric.
•    Segmental.
•    Eccentric.
•    Quadrant Edge.
 

Answer / faiyaz

1 .Concentric
2 .Eccentric
3. Segmental
4. Quadrant Edge

how radio frequency level probes works with its controller ? what is its principle ? pls give me brief explanation?

1 Answers  

---

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers   Indian Steel,

---

why we use only 4-20 ma signal as AI and not 0-20 ma?

2 Answers   Honeywell, Oil and Gas Jobs,

---

What is ptw and write 3 types of ptw?

5 Answers   Emco,

---

in the boiler in the main steam line and its bypass line and the startup vent vales are only motorised valves why cant we use other types of valves such as pneumatic.

3 Answers  

---

Basics Instrumentation Question

1 Answers   Advantek Fuel Systems,

---

i need some objective type questions in instrumentation

1 Answers  

---

compare the thermocouple and pyrometer,which one is the best?why?

4 Answers   Ramco,

---

please give me the syllabus and sample questions if possible for Instrumentation for Vizag Steel plant MT (Trainee) 2009 exam

1 Answers   Pedvak, Steel Plant, Vizag Steel,

---

what is the difference about HART, and 4-20mA signal?

8 Answers  

---

Explain ratio control system.

1 Answers  

---

difference between accuracy and precision

6 Answers   Honeywell, ONGC,

---