Answer / guest

DIGITAL OUTPUTS SIGMALS MEANS NO OR NC CONTACTS & DO COMMANDS
MEANS CONTACT CHANGE OVER ALONG WITH VOLTAGE 24 V DC 0R 230 V
AC

thermocouple output is AC OR DC??

17 Answers  

---

How to carry out hot loop checking of closed loop pf temperature control valve & temperature transmitter?

2 Answers  

---

what is sliding spool valves?

0 Answers  

---

what is the zero and span trim?

2 Answers  

---

HOW DPT WORKS?

6 Answers   Essar,

---

---

what is the criteria to decide conductor size of a cable ?

0 Answers  

---

wht is dcs architecture ? can u give example?

3 Answers  

---

Steve said that "An eddy-current probe works by passing an alternating current through a coil of wire and measuring the coil’s impedance" while we are using -24 Volt DC , So I am confused about DC and AC. Plz .

2 Answers   Jindal, Sadara Chemicals,

---

how to calibrate transmitter

3 Answers   Sabic,

---

i am going to attend ongc exam this coming june for Graduate Engineer Trainee post if anybody knows the question pattern or have experience plz share it with me

3 Answers   ONGC,

---

What is Integral and Derivative control?

5 Answers   Qatar Petroleums,

---

What is the main difference between Cavitation and Flashing?

1 Answers  

---