Instrumentation Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Instrumentation Interview Questions

Questions Answers Views Company eMail

State 5 different method of level measurements.

SRACO,

3 6858

what is the essential difference between DIODE and SCR in term of application.

ADMA OPCO,

2 6030

In turbine, what does term CDP, NI, NH, HSSOC, means

ADMA OPCO,

2772

An equipment is certified for EEX, IA, IIC, T6, what do you under stand by this.

ADMA OPCO,

3 7685

I HAVE PRESSURE TRANSMITTER WITH TWO WIRES 24 VOLTS SUPPLY.IF TRANSMITTER WILL GIVE SIGNAL TO THE DCS WHAT HAPPEN TO THE 24 VOLTS POWER SUPPLY IT WILL DROP OR REMAIN TO 24 VOLTS POWER SUPPLY.

3 7925

what is sequence table in DCS . make a logic in sequence table for tripping of ID fan in Boiler(in YOKOGAWA CS 3000 DCS).

Yokogawa,

1 7529

Dear all... I have 1 0-400 duplex type RTD, I connected the A side to the temperature indicator and B side to the PLC panel, but when I have observed then found that The PLC side temp has the variation. and it was distub to other RTD temp also. so what can I do.

1 4497

Worley Parsons,

1 5046

Can we used Condensate Pot on flow transmitter which is using on liquid having sluge and DP transmitter is in pit and below the process line,Can we used Condensate pot for accamulate the Sluge?

1 5815

What properties or parameters to be taken into consideration for protection while selection of Dcs controller.

JPL,

1 4322

What is the difference between ROM & RAM .

Sabic, SPIC,

1 5581

Can we use a 10000 Lph Flow Transmitter in 100 LPH flow line to get 20mA O/P by adjusting SPAN ?

1 4692

in differential pressure transmitter,min&max pressure range for hp&lp

2004

What is the difference between EPROM & EEPROM.

Sabic,

1 9336

What is scale factor of proximitor & unit of the viabration.

Sabic,

2 6086

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Un-Answered Questions { Instrumentation }

What is the procedure of calibration of Load cell?

1924

In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.

2957

what about your moleg in pogrees with company

2279

If P will increase then what will happen with PID?

6065

For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

5458

why we r opening HOT BYPASS valve during startup of a compressor?

2099

how to convert cubic metre per hour to newton cubic metre per hour

2006

Specific gravity.

1879

Q- What are the application in which PNP transistor is preferred over NPN ?

3345

we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?

2586

HOW TO CALCULATE ACCURACY OF AN INSTRUMENT. WHICH IS COMPITABLE FOR USE.

2303

in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.

2807

what is easiest way to read STL language in PLC?

3137

centrifugal compressor interlock? Tell me the parameter at which compressor will trip

3185

If relative y axis vibration sensor is by passed, and relative x axis and absolute sensor is left working. how much monitoring i would have risked?

1463

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