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.

1900

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

Chevron,

1 2118

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 7463

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

Thermax,

1 4846

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

2135

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 5537

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.

1482

KAlman filter code for two dimension?

Tisco,

1591

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

Thermax,

1 2601

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

1655

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

IMECO, Voltech,

2 6596

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 6301

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 3506

what is control valve and how is work

Descon,

5 8097

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,

1397


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Un-Answered Questions { Instrumentation }

What is solenoid valve? Where it is used?

594


A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

1765


draw shematic diagram of c/v positioner(smart type)?

1737


i am having information technology branh ....... can i prepare for psu exam

1708


NPN transistor, SCR, Zener diode, LED, Varactor diode, Vortex meter, RTD, Resistor, Crystal

1718






What is frequency factor in massflow meter? When using frequency output?

1297


while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?

1681


What is the cascade control

970


If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

1809


What is instrumentation technologists and mechanics?

551


The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?

1819


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


use of split range ? where it is used ? in which control loop it is used ?

1459


Regarding , there is an air cooler which control the fans(50% of AV FANS) by temperature in outlet , and the louver of Air cooler is controlled by HIC from control system , So if on Air cooler we will consider 2 individual I/P converter or positioner?

1346


why we use the ac supply load cell>?can we use the dc supply load cell?advantages and disadvantage of the ac supply load cell?

5853