Instrumentation Interview Questions
Questions Answers Views Company eMail

hello dear i have faced problem in drum level transmitter. the problem is when i engrize the meter meter shows 100% but the actual level 40 or something plz suggest me

7 7804

Specify eight technical requirements that you would consider important, when deciding upon a particular control valve?

1424

Name four general (not technical) criteria that would you consider important, when deciding upon a particular control valve?

1 3220

Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

1650

i install a DP transmitter of Faugi on drum level of boiler but i face a problem in it when i engergize the transmitter the meter shows 0 or 100% no variation in it.the distance of two points is 19.5 inches, i am in trouble please suggest me what can i do it's very urgent Please reply me as soon as possible Best regards ikraam haider

5 6522

what is the difference between plc & DCS?

Cheminova, NGIL, Siemens,

5 7751

why we use npn sensor in vibration monitoring system

1 2310

why we use sensing type(NPN)on a vibration monitring system not a (PNP)sensing type

1 2554

what is the diffrence between LCN and UCN

2 18993

What is the function of SMPS

2 6783

when we are using HART COMMUNICATOR why we are using 250 ohm resistance while using HART COMMUNICATOR.

7 16642

what is moisture probe? What are there types? What is there working principle and how they works? guys this is one of technical question I had ask in interview. If you know its answer please let me know. The interviewers were more interested in microwave moisture probe, so if you find its any link please just forward me on my mail id.avinash1200@gmail.com Thanks in advance.

1524

What is the main difference between Cavitation and Flashing?

1 13414

Why we used cage in control valve?

8 8828

A pressure Tx accuracy is 0.2%. Signal o/p is 4-20ma.span is 16 Ma.how many deviate the o/p then calibration needed

1 3119


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Un-Answered Questions { Instrumentation }

why orfice is not used for main steam flow calculation

1601


Hi Friends i need Electronics&Instrumentation Engg question papers for BARC written test by coming 20th May 2008 pls post ur use full info to kkumarei@gmail.com. Or for suggestions pls give one missed call to 9962122264

1506


Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..

3276


What is Alpha & Beta fctors related to Orifice Plate & its relation with flow?

2927


describe flow nozzel principle?

2075






which type of zones used for boiler? & why ?

1424


I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1463


What happen if we install my pressure transmitter below the elevation of pipe in natural gas service?

627


What is three element in drum level?

921


Hi Friends i am going to write BARC written test by this month 20th (20-5-2008). So please if any body knows the details about this or having previous question papers pls mail me to kkumarei@gmail.com. For Suggestions give one message to 9962122264

1977


Name different parts of a pressure gauge.

640


how pressurize drum calibrated ?

1573


how u calibrate pneumatic n motorized c/v?

1530


what effects a surging can produce in the compressor

1467


Somebody tell me in what way i need to prepare for csio pgrpe(adv instrum eng)interview?what all the quest can i expect?

2105