Answer / d tilston

Absolute pressure is zero when the pressure is that of a
pure vacuum. There can never be a negative absolute pressure.
Gauge pressure is zero when the pressure equals the air
pressure outside the container being measured. If that
pressure is less then the ambient pressure, then it is
considered a negative gauge pressure.

Answer / samir

Absolute Pressure= Atmospheric Pr.+ Gauge Pr.

Explain about relays.. Can we give both AC and DC to the same relay... How it is energising.. Explain its working..

7 Answers   IOCL,

---

Describe the concept of Gain Scheduling, as currently found as an option in some controllers.

1 Answers  

---

what is the difference b/w normal thermocouple and skin type thermocouple?

1 Answers   Heisco,

---

, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.

0 Answers  

---

what is preventive maintenance , explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

---

what is instrument termination

1 Answers  

---

What is transmitter

2 Answers   GNFC, QNFS,

---

Why grounding is necessary? Give example with diagram.

0 Answers   Bright Point, DS Group,

---

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,

---

Why we not use 2-20Ma or 1-20Ma

5 Answers  

---

Who to difference between analog in & analog out in dcs?

0 Answers  

---

could someone explain for me what is 32-bit Floating Point ? Thanks

1 Answers  

---