Instrumentation Interview Questions
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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 4314

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 17858

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

IOCL,

3 11871

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

IOCL,

7 12414

Where & Why we are using SURGE PROTECTION ?

IOCL,

4 8247

what is sil (safety integrity level

Essar,

2196

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

GATE,

4 9575

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

2 3311

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 7101

WHAT DO YOU MEAN BY LOOP IN C.

Wipro,

2 5425

why cant we use mV instead of mA?

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

12 20254

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

3 6811

What are SMART insuments?

5 7046

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

1497

key exchanges in wpa,wpa2,tls

1506


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

Programmable Logic control.

1513


A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

1784


What is eddy current? Describe the operating principle of proximity probe.

1760


Draw a group of instruments interlocked to a Pump & Motor?

652


what is the protection system in solar turbine compressor

1709






Somebody can explain me about >Critical Loops, calibrations, ESD critical Loop checks, Logic Diagram / Cause & Effect checks for ESD loops,

1240


flow transmeter accuracy 0.075% of full scale & find ucertainty is 0.025 % so what is maximum limit band of uncertainty

1826


How does your previous experience relate to the job you are applying for ?

1558


Positioner usage.

1488


What is the start up procedure of desalter

3040


sir ,iam in dem urgent need of HPCL Paper of Instrumentation Branch plz send me at your earliest convenience at ujjwal_sharma1983@yahoo.com

1941


Why rdt and thermocouple both give different output .and one things more, how to generate  ohm or mili volt  plz mail me merajalam143545@yahoo.com

2321


Explain why plc require in analog input 4-20amp & 0-10 volt?

620


What is instrumentation technologists and mechanics?

575


I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?

1642