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

Instrumentation Interview Questions

Questions Answers Views Company eMail

if i want to make a zero trim for mass flow meter the pipe line should be empty or i need to make it full? i really need the answer pls help me

2 5428

How we can do the linearity test for Bently Naveda Vibration Probe?

Sabic,

1 18296

why level transmitter input is given 4to20ma

Sabic,

2 6682

why most of the DP transmitters using maximum range as 0-2500mmwc?why not 1000 2000 3000 4000mmwc

SPIC, TNPL,

2 8340

How we will check whether the proximity, which we have is either NPN or PNP, if no data sheet or manual or any details is available to us ???

1 6716

if change the pid in D value so what action.

Siemens,

2 8383

What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?

KNPC,

2135

Transducer Input 0 to 230 v ac Output-0 to 10vdc Receiver Input 0 to 10 vdc and Output 4 to 20 ma How?

1 3686

in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 4616

How to control flow variations in magnetic flow maters..... When i will provide proper earthing?

ABB, L&T,

2327

how to calibrate displacer type level transmitter by dry weight method please mention formula for weight calculation

1 13510

if a dp transmitter has range 100 in H2O and flow is 20mmcf and if the flow is changed to 25 mmcf then what is the formula to determine new range of transmitter

TATA,

1 5678

What is the difference between uv and ir scanners? and what is the workig principle of both

2373

applications of plc in printing and packaging?

2214

what is protonics how it is differ from electronics

1 6622

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Un-Answered Questions { Instrumentation }

1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?

2216

What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).

2157

what is the difference between Cv and air consumption? why the customer needs Air consumption details?

1989

why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ?

1911

How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

2109

Can anybody tell me which type of question are asked in the interview for the FORMULATION(Pharma) as a instrumentation engineer, & question in building managment system.

2021

, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.

8105

What are different types of valves?

1340

Explain PID controller tuning & any one method used for it.

7816

What is the use of temperature compensation?

2016

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

2247

How ejector(or)evactor air pump is working in thermal power plant?

6622

what is the imbustion control loop

1892

Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.

1896

what is KV and XV valve

1802

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