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Instrumentation Interview Questions
Questions Answers Views Company eMail

What is heating effect?

Process Control Technologies,

2287

Why is the length of cable layyed from RTD to temp. Transmitter should be minimum? Why does heating effect takes place in their?

Process Control Technologies,

1 6217

Why do we use triad cable for RTD to Temp.transmitter connection? Why we don't use 3 core cable?

Process Control Technologies,

1 14914

What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem? 

Process Control Technologies,

2450

Why do we have earthing cable in branch cable and shield in the same cable?

Process Control Technologies,

2570

Why 1-5 vdc a standard?

Process Control Technologies,

1 7764

Hello Friends do you know this answer of this Question? Which color you would use when there is Somthing not correct or need to change In P&ID? i mean color that use for highlight that need to update in P&ID. Yellow Highlighter ? Red color ? Blue Color ? Appreciate for your answer. Thanks Blue Color

2 5915

what is all types of analyzer in water production plant?

Marafiq,

1 3184

flow transmitter formula?

BEMCO, Siemens, Yokogawa,

2767

Flow tax range 0 to 100 mmh2o ,flow rate 40 tons /hr, I want change flow rate example 42 tons/hr so tx range ?

2 4416

Describe how to use megger to measure the earth resistance and insulation resistance

2177

why we use the 4-20 mamp signal used for transmitter.

Tecnimont,

5 10543

Boiler flame scanner working principle?

Bhel,

1 7102

Why boiler chimney area  oxyden sensor fixing? 

NTPC,

2434

How to calculate flow of air bubbler type level transmiter  According hight and density 

Qatar Petroleums, RKS,

2 5668


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

where proximity sensor installed on tank in loading arm application

2225


1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?

2149


What is super thermocoupal?

2177


in valve is constructed as per SME B 16.34, then which standard is used for fire testing of valve?.

1960


centrifugal compressor interlock? Tell me the parameter at which compressor will trip

3121


For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

3083


why we r opening HOT BYPASS valve during startup of a compressor?

2068


what would be the minimum flow rate that we can measure on rotameter..?

2045


What is Predictive Maintenance

1136


I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?

2162


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

3421


when a magnet is heated?

1933


what is the difference between magnetic flow meter and mass flowmeter

1465


In turbine, what does term CDP, NI, NH, HSSOC, means

2700


Name different types of bourdon tubes.

1090