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

1 Answers   AirIndia, Shree Renuka Sugars,

---

What is meant by cold float of compressor shaft.

1 Answers   Sabic,

---

what is start up vent valve ? why it is used in boiler?

8 Answers   ACC, Bhushan Power Steel,

---

Explain bernoulli’s theorem. State its application.

0 Answers  

---

How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System

0 Answers  

---

what is difference between DO and DI

6 Answers  

---

List three types Level Transmitters with their working principles

1 Answers   ABB, Bapco Bahrain Petroleum Company,

---

how to calibrate load cell

0 Answers   Siemens,

---

What information needs for Control Valve "sizing"

1 Answers   Qatar Petroleums,

---

What is governor of turbine?

3 Answers   Reliance,

---

when an eddy current probe is installed inside of a turbine or compressor in case of probe problem same as:crash of head of probe,changing the scale factor because of low measuring gap(physical gap is ok(example=1.14mm)but voltage is reduced(example=-6 volts),is any way to check the probe,when the ohm of probe is ok.thank you,(Karim Tavakoli)

1 Answers  

---

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers  

---