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Instrumentation Interview Questions
Questions Answers Views Company eMail

How to Calibrate Level Troll in field

1404

How to Calibrate Interface Level Troll in field

1366

How to Calibrate Flammable gas detector in field

1213

How to Calibrate Coriolis Flow transmitter in field

1267

How to Calibrate Level Switch in field

1336

How to Calibrate Temperature Switch in field

1313

How to Calibrate Flow Switch in field

1256

How to Calibrate Vibration Probe (Axial, Redial) in field

1142

How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System

1369

Draw a group of instruments interlocked to a Pump & Motor?

1294

Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75 The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is: WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. STN0149 ---- ERROR = 2 WARNING = 1 ---- Background: >Updated the ExaOPC software on the STN from 3.60 to 3.75 >STN operating system is Windows Server 2008 R2 >HIS operating system is Windows Server 2016 Stanard Solutions attempted include: >Ensuring all IP addresses are correct and all networked devices can be pinged. >The ability to ping a device using its host name from another device ( from HIS) >Ensure both devices firewalls are disabled. >The antivirus installed on the STN is disabled. >Ensuring both devices are within the same workgroup. >Added both devices to each other's Host and LMHost files. >Running IT Security tool after changing any administrative settings.

2194

how will you check torque value during Factory acceptance Test for control valve/ESD ON/OFF VALE how will you confirm this torque value is being correct, Which document will you be refer.

2488

how will you segregate the alarm levels in alarm management system during factory Acceptance Test

2386

Why not come out analog output in ABB EL3020 when display show correct value

1885


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Un-Answered Questions { Instrumentation }

Why are the uses 24vdc in industries

1020


what is instrument philosophy

2263


diff between neutral ,ground,phase , earthing and shielding?

2288


what is the reason while warning lamp is on while the engine is cranking?

2145


Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

2211


How works weighfeeders in cement industry? what is the working principle?

2041


What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?

1925


We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.

1663


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

2224


what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?

2118


Draw bode plot of any transfer function. Why is plotting bode necessary?

2513


Differentiate between ultrasonic flowmeter and radar type flow meter

1217


What is Predictive Maintenance

1168


What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?

3466


Explain the combusion chamber

2026