wat are the interview questions asked in air india for post service engineer

1 Answers   AirIndia, Shree Renuka Sugars,

---

what is o2 analyzer and how it measured ,what is the role of this analyzer in cfbc boiler...

2 Answers  

---

What are the charcterstics of a P&ID controller block for Governor speed raise or lower for a load sharing functionality between 4 Gas turbines in droop mode.

0 Answers   TNPL,

---

Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

---

what is the difference between magnetic flow meter and mass flowmeter

0 Answers  

---

what is the differnt between open loop and close loop ?

5 Answers   India Cements,

---

what is interlock ckt? why it is necessary in industrial machines ?

2 Answers   IOCL,

---

How will you test a transistor with a multimeter?

0 Answers  

---

What is the formula of vabration sesore. i mean how to covert mils to volt plz share if any body knows   very argent : my mai is merajalam143545@yahoo.com

0 Answers   Samsung,

---

I want to measure level under vaccum by using DP Tx and vaccum vary between -500 to -670 mmHg and process fluid is accetic anhydride if consider process fluid density 1 kg/cm2. how to calibrate Tx ? consider level is 0 to 100 Cm.

1 Answers   CCC,

---

WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL? INSTEAD OF 4-20mA.

6 Answers   Hindustan Unilever Limited, Yashmun Engineers,

---

what is Analog input/output & Digital input/output,

2 Answers   Bapco Bahrain Petroleum Company,

---