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

Instrumentation Interview Questions

Questions Answers Views Company eMail

Difference between ultrasonic flow meter and radar type flow meter

Dodsal, Qatar Petroleums,

2 14314

WHAT IS A SYMPTOM OF FAULT WITH THE SPAN OF AN INSTRUMENT? 1)ZERO-POINT AND 100% ARE CORRECT BUT NOT A MID-RANGE. 2)ZERO-POINT IS CORRECT ,BUT 1005 INPUT IS NOT GIVING 100% OUTPUT. 3)LINEARITY PRBS. 4)1005 O/p IS CORRECT BUT ZEO POINT IS WRONG.

Reliance,

1 11974

Can a pneumatic control valve work without positioner?

SMC,

4 8287

How to adjust the zero & span of a control valve from the posiitioner(MIL)?

Bhel, SMC,

1 10462

WHAT IS SELF CLEAN ELCTRODE IN MAGNETIC FLOWMETER?? WHAT DO YOU MEAN BY THIS TERM??

IOCL,

2 9432

why to use 3 wire at RTD ? what's the reason for common wire ?

4 10834

What is the use of each wire in three wire RTD

GSPC,

2506

How to convert gpm into inches of eater.I nerd formula with example so pls help me.

1 4226

Please can anybody help for control valve sizing step by step procedure?

2127

Can anybody please let me know Orifice plate sizing calculation formula and step by step procedure

1994

Pls.could any one Clarify the following with an example. 1.At What condition Close on Rise and Close on Fall Pressure Switch contacts are used. 2.If Pressure is abnormal as per set pressure,if connecting Terminal of pressure switch breaks,how the voltage extends to Relay base. 3.Are these contacts come under fail safe philasaphy.

1 4489

how to set calibration range in a DP transmitter to measure level for a closed tank and for an open tank,and also please explain me how to set calibration range for a DP flow transmitter in a line ?

CCL Products, IOCL,

1 9431

While giving Power Supply of 24 VDC to a Transmitter,why Shield Terminal is connected either at Transmitter or at ISB.Why not Shield Terminal connected at both ends.If the Reason is to avoid Noise interference,which type of noice that is interfering.Is the Noice from the 24 VDC supply terminals or from any external source.

1 5648

what is ABB DCS SYSTEM?

OMV,

2 6561

How to find out the current of two motors having same power consumption but different RPM?

2016

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Un-Answered Questions { Instrumentation }

how can use ram

2055

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

2030

principle of automatic votage regulator

2139

why we are not using the turbine flow meter in the steam service?

2208

How can a d.p. Transmitter be calibrated?

1302

Calibration procedure for Electro magnetic Flow meter

4486

what is interface level and how it is calibrate?

2403

How d.p. Transmitter can be applied to open tank?

1128

can you provide me full detail about instrumentation in ONGC??

2166

what is SIL 1 2 3

2037

can anyone tell me about the basic concepts to consider before to start a PLC panel wiring

1938

How to convert mmWc(mili meter water colam) to tph(ton per hour)?

981

In most instances, Inertia processes are quite uncommon. Give an example of a combined Resistance and Capacitance situation.Describe an application, which according to your understanding of the subject matter, comprises of both Resistance and Capacitance effects.

2025

I have energy meter for educational project having 0.5s class but my friend need 0.2s class meter , which one is good for that purpose and what is the actual difference of that two classes , need very easy example also.??

1404

What is the function of solenoid valve in on/off & shutdown valve and why it is not used in control valve normally?

2023

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