Answer / himanshu singh

AC stands for alternating current.It has frequency in it.It
flows in single,dual or 3 phase as per requirement.Thus it
has phase and neutral i.e return...also it has pulses and
follows sine graph.
Where as DC stands for Direct Current.It has zero frequency
and has one positive and one negative.Infact Dc is much
powerful than AC.

Answer / rajesh kumar

amplitude of an ac voltage continiously with time
it has a frequency
dc voltage does not have frequency
the amplitude does not vary with time

what is the daily job of an instrument commissioning supervisor

1 Answers   Petrofac,

---

can anyone tell me about the basic concepts to consider before to start a PLC panel wiring

0 Answers   ABB,

---

May I have a brief note above the voltage barriers? Whats is the purpose? Please mail me if you've operational details, mail id: rajkumar.diice@gmail.com

0 Answers  

---

How the sizing of the analog signal cable is calculate?

0 Answers   Reliance,

---

what is differential pressure transmitter and transducer? how to work?

1 Answers   Idea,

---

when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?

0 Answers  

---

what is the meaning of HART ?

2 Answers  

---

a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

2 Answers  

---

During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????

1 Answers  

---

What is the role of Integral in pid control?

6 Answers  

---

Where can i take training in intools software for Instrumentation design??

9 Answers  

---

I have a steam flow DP transmitter that has output swinging. Steam valve is in manual.I have good steam pressure. The impulse lines have steam tracing on them. The steam tracing has a hole in it that is blowing raw steam on the high side impulse line only. Could this be causing the swinging?

1 Answers   Honeywell,

---