what is vfd(variable frequency drive)?type of vfd.

2 Answers  

---

why gray colour is choosing to all instrument panel.why not choosing other colour?

1 Answers   Reliance,

---

how to calculate signal cable sizing? and multipair cable sizing??explain in brief?

0 Answers  

---

Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?

0 Answers  

---

why fuse block is not used for AI signal?

0 Answers  

---

what is loop folder?

1 Answers   Bapco Bahrain Petroleum Company, Hyundai,

---

Why we use the double acting control valve in flow line?

3 Answers  

---

Hello Friends do you know this answer of this Question? Which color you would use when there is Somthing not correct or need to change In P&ID? i mean color that use for highlight that need to update in P&ID. Yellow Highlighter ? Red color ? Blue Color ? Appreciate for your answer. Thanks Blue Color

2 Answers  

---

Explain types of valves?

0 Answers  

---

what does a positioner in control valve ?

11 Answers  

---

If we increase D what will be the controller action?

2 Answers  

---

send me last 5 years questions asked in rrb chennai, for section engineer

0 Answers   RRB,

---