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 4349

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 17895

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

IOCL,

3 11911

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

IOCL,

7 12476

Where & Why we are using SURGE PROTECTION ?

IOCL,

4 8347

what is sil (safety integrity level

Essar,

2216

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

GATE,

4 9634

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

2 3332

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 7129

WHAT DO YOU MEAN BY LOOP IN C.

Wipro,

2 5466

why cant we use mV instead of mA?

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

12 20386

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

3 6840

What are SMART insuments?

5 7084

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

1509

key exchanges in wpa,wpa2,tls

1514


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Un-Answered Questions { Instrumentation }

what is dc moter.

1781


pls give me presant awerness quistion and answer in my emailid.

2336


why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.

2217


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

1771


Boolean algebra

1723






How to calibration a control valve?

715


Using your own examples solve a problem involving normal table. (experimental method and analysis)

690


can we copy the software from a transmitter using hht(hart 275) ?

1643


How u will setup SPI(2007) on Citrix Server (Thin Client Mode)? Plz Justify?

1601


how to design orifice plate?what is the equation?

1637


any body please send me the old question papers of ongc test.

1685


1- Explain about HPM 2- What is the FSC and explain the configuration of FSC 3- explain the complete loop of vibration, how it works (field to control room) 4- What is the use of proxymitter? 5- During job your partner effected with H2S then what you have to do. 6- what type of gland packing uses when valve glind is leaking.

2384


why we use the ac supply load cell>?can we use the dc supply load cell?advantages and disadvantage of the ac supply load cell?

5897


How flow can be measured with dp?

680


Explain plc level and its type?

763