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Instrumentation Interview Questions
Questions Answers Views Company eMail

-/5A. What is the meaning and limitations of this in energy meter constant. It is a 3 phase LT Energy Meter. If this Energy Meter is connected through a CT of ratio 200/5 Amps, then what is the multiplying constant and how its will be calculated.

1527

How to calibrate vertex flow meter? How to calibrate mass flow meter?

Chevron,

1 1492

1.In which princeple DP transmeter works? 2.Why UPS system is use for DCS? 3.How drum lvel controller works? 4.What is the difference between glob valve and gate valve? 5.How axial shift probe work & in which princeple it works?

Luberef, Qatar Gas, Reliance,

1 6249

what is the calibration standard for pressure and differential pressure transmitters?

Thermax,

1 4237

What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.

1682

while stroke checking of a linear control valve ,found its travel is in non linear ,what can be possible reason ? ( please answer send in mannanali65@gmail.com) pls pls pls if any body know

JAL International,

2 4608

I want to buy a seal kit of a pneumatic power cylinder.But I don't know it's specification.So please help me to know its specification.

1090

KAlman filter code for two dimension?

Tisco,

1135

how to define the P,I,D value in tuning pid loops in online.

Thermax,

1 1895

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

1214

In close vessel/ drum why we use d.p. transmitter of -ve range i.e. (-)500 to 0 mmwc.

IMECO, Voltech,

2 5616

flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...how to solve this problem when we apply 375 mmwc it shows 16 ma

3 5025

My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......

1 2825

what is control valve and how is work

Descon,

5 6620

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 ?

NATPET,

987


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Un-Answered Questions { Instrumentation }

whatis range of marcury filled tempereture gague

1085


What do you know about gail?

1537


why using negative supply for bentley nevada vibration system ?

1270


Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

507


What is the calibration procedure of Drum level transmitter if range is 0 to -400 mmh2o in lab?

1253






HOW CREATED LP & HP PRESURES IN DRUM FOR DRUM LEVEL MEASUREMENT!

1007


What are different types of orifice plates?

207


In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

1177


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

205


when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?

862


what is the minimum power (P=VI)to produce a spark?

1131


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 ?

987


What is Alpha & Beta fctors related to Orifice Plate & its relation with flow?

2472


what effects a surging can produce in the compressor

1049


is motorized valve closed when power shutoff?

618