Instrumentation Interview Questions
Questions Answers Views Company eMail

I wnat to practice more online type questions .so will you show them me to take a practice test?

VA Tech Wabag,

905

what is span value and zero ? and how set ?

1050

Who to difference between analog in & analog out in dcs?

1005

need to calculate flow rate with the help of dp range and orifice bore dia and size. range is 0 to 400 inwc and orifice size is 12 inch 150 # rf and bore dia is 7.180 inch. need to calculation for flow rate

862

the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

1111

What Is Pre- Commissioning Package +what is DCS & ESD Pre- Commissioning for Instruments Please explain your answer on practical ground base

897

How to decrease opening & closing time of on/off valve?

UPL,

943

Difference between guide wave radar & non guide wave radar ?

UPL,

1 1536

Why flow/pressure transmitter before control valve?

UPL,

1033

Relation in MMWC to Flow rate

1 1545

is motorized valve closed when power shutoff?

Unilever,

1145

What is three element in drum level?

902

What is 3 element control system

993

A valve in series with an orifice plate (DP transmitter), is aligned for constant pressure in the pipeline, if there is an error dx, How to align it in process.

845

A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

860


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?

1758


What is hp & mp seperator .& what is its working principle ?

1799


what are the diff. in servo and regulatory control?

3431


what is dc moter.

1739


How is PH sensor works ?

1549






i want to find out iffco get test paper

12177


why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.

1903


Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.

1612


what is piezoelectric transducer?give an example in power plant n state its principle?

2044


what is the difference between magnetic flow meter and mass flowmeter

880


we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?

2089


What is the use of temprature compensation?

698


Name different parts of a pressure gauge.

626


I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1442


how to calibrate load cell

2295