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Instrumentation Interview Questions
Questions Answers Views Company eMail

there are two candidates p and q in an election.During the campaign,40% of the voters promised to vote for P ,and rest for Q.however, on the day of election 15% of the voter went back on their promise to vote for P and instead voted for Q. 25% of the voters went back on their promise to vote for Q and instead voted for P.suppose,P lost by two votes,then what was the total no. of voters.

GATE,

1 5353

there are two candidates p and q in an election.During the campaign,40% of the voters promised to vote for P ,and rest for Q.however, on the day of election 15% of the voter went back on their promise to vote for P and instead voted for Q. 25% of the voters went back on their promise to vote for Q and instead voted for P.suppose,P lost by two votes,then what was the total no. of voters.

GATE,

4 19856

Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

IOCL,

3 13047

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

IOCL,

7 14411

Where & Why we are using SURGE PROTECTION ?

IOCL,

4 9840

what is sil (safety integrity level

Essar,

2733

Explain about SOURCING & SINKING concepts in PLC to field sensor wiring ?

GATE,

4 11480

I am a electronics and instrumentation fresher trying for a job in IT sector. what do need to prepare for the interview?

2 4617

In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

L&T,

6 8705

WHAT DO YOU MEAN BY LOOP IN C.

Wipro,

2 6549

why cant we use mV instead of mA?

ABB, Power Grid, Qatar Gas, USW, Visa Steel,

12 23619

why 4 to 20 ma? why cant some other range?

3 7886

What are SMART insuments?

5 8650

explain key exchanges in all security modes WPA,WPA2,TLS?

2046

key exchanges in wpa,wpa2,tls

1922


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

explain key exchanges in all security modes WPA,WPA2,TLS?

2046


Do you have reference list?

1833


I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?

2205


What are the error values can accepted in flow transmitter calibration?could u give any formula for this?

1906


What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?

1977


where proximity sensor installed on tank in loading arm application

1956


what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

4846


What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?

2036


What is zero elevation and zero suppression?

2165


What is 3 selection available when configure the burnout protection for controller

2702


Explain an adaptive / self-tuning controller’s major draw card.

2322


I have completed B.E. Instrumentation & control in 2009. i have 3 year industrial job experience in chemical plant.now, I want to join M.E. in external. so, Plese say easiet way and good institute name.

1900


Why are the uses 24vdc in industries

1012


how works encoder in plc

2075


how to calibrate steam control valve in steam turbine

3325