Instrumentation Interview Questions
Questions Answers Views Company eMail

What is three element drum level control system why its better than single element?

2041

What is the cascade control system and where is use in power plant give the detail with block diagram

1 2227

Why ues 250 ohms Resistor during hart type instruments calibration with hart protocol in details ?

5 11441

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the physical measurements Total height of tank is 1850 mtr but 0% level is 1000mm above bottom and 100% level is 450 below upper side.What is the LRV and URV and please mention the formula .The SG of LPG is 0.53 and Wet Leg method will be used.

7 10224

If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used? Please tell me its Calculation formula.

MOL,

5 7908

Why we use DPT? can we use PT instead of DPT?

2 7514

why we require Differential pressure?Why we use Orifice Plate?

3 7399

what is Instrumentation?

RCL, TCS,

5 7194

what is Automation?

3 4227

what do you mean by Loop checking ? What are the cold loop check and hot loop check? what are the difference between these two loops?

1 7482

If a transmitter is installed 10 m below its tapping point how much pressure exerted if fluid is water?

QAFCO,

10 12966

How to check electrical health of Vibration probe?

QAFCO,

1 2836

What safety precautions you will adopt to work on Steam service control valve?

QAFCO,

1 3033

How to calibrate a temperature transmitter & how a Cold junction Compensation will be carried out?

QAFCO,

2 7143

please explain smoke detectore & lel detector?what is o/p

1 3943


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Un-Answered Questions { Instrumentation }

what is cold loop? difference between hot and cold loop?

1719


what is intrinscily safe system and where we use?

1977


What is the basic difference between Modbus and CAN Open Protocols

5799


a flow transmitter [range-0-400mbar] connected in process line. please explain me how to calibrate the flow transmitter , & how to do static error

1826


hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q

1435






State four different types of flow measurement, for gas flow measurement MMSCFD is the common unit expand the unit and specify significance of word S in the unit.

1521


How to fix back the valve actuator stem

1592


please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826

1610


Why all the drains(Gland sealing,ESV,Casing inlet etc) are directly connected to the flash tank instead of hotwell of the condensor in the power plant? My Email Id:naba02222@gmail.com

1838


How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

1602


What is the use of control cable?

656


What is profibus?

625


3. Differentiate between ultrasonic flowmeter and radar type flow meter.

2416


How hart protocol can be connected with control valves?

580


How INtools is useful for routine Instrument maintenance?

1543