What is pre-commissioning and commissioning ?

1 Answers   Armco,

---

why 4-20 mA in covection system?

3 Answers  

---

what is your eligibility criteria for freashers?

0 Answers   Satyam,

---

How to work & calculated output of the Derivative action in pid controller (Explain Derivative controller)

0 Answers  

---

Anybody can tell me  how to convert mmHg2o /psi to scfm  please give me formula of conversion

0 Answers   Samsung,

---

If a flow transmitter (magnetic type FT) that can measure flow and temperature, then why in some industries people use flow transmitter and temperature transmitter in the same line 1 after another? Even after 1 single flow FT is capable of measuring flow as well as temperature.

1 Answers   Process Control Technologies,

---

is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?

0 Answers  

---

hello this is dhinakar subramanian. how to piping and instrumenation drawings and also how to create the data sheets...

1 Answers  

---

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?

0 Answers   ABB, L&T,

---

what is the difference between hub and switch?

6 Answers  

---

what is basic working principle of Governer in power plant?

3 Answers  

---

A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

---