Instrumentation Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Instrumentation Interview Questions

Questions Answers Views Company eMail

if we mount flow tube in arrow direction then flow comes in negative & if we mount it another direction then flow comes positive,So what will be the problem

2 4900

if tx. dp increase or decrese what happend in the reading

BSP,

1 5128

how can calibrate vacume trasmitter by HART COMMUNICATOR ?

Bajaj, IMECO,

3 7490

What's the difference between cold loop test and hot loop test?

5 43675

Can we calibrate an actuator?

Siemens,

5 12642

What is Cu-100 and Cu-1000 ? and tell me its application ?

2 6857

why we cant transmit the dc current easily

1 5175

What is the Temperature Co-officient of Resistance of PT- 1000 and PT-2000 ?

Adani, Birla, MEIL,

2 9354

Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?

SCS,

2 7181

ABB DCS (AC 800 M)redundency take howmany milliseconds to switch from master controller to slave?should be less than DCS scanning time?

SCS,

2 6293

A DP Endress and Hauser flow transmitter is always tripping pump at low flow. set point is 74 cubic meter/hr. Thorough impulse line flushing and zero calibration has been done, yet problem persists. What do you think is the problem and how do you rectify this fault?

5 8128

how works encoder in plc

2088

Explain the usage of the PLC system?

3 6685

Explain the difference between the types of input variables plc?

1 4836

Is an analogue only transmitter as accurate as a smart transmitter?

SCA,

2 5109

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Un-Answered Questions { Instrumentation }

what is the input to be given in digital flow meter during the the calibration time?

2238

How u measure the massflow in orifice flow measurement techniques

1411

What is force balance principle?

1185

Explain why use mmwc unit?

1057

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?

2209

Specific gravity.

1887

what is the process for double acting cylinder pneumatic for 32' v/v

2080

May I have a brief note above the voltage barriers? Whats is the purpose? Please mail me if you've operational details, mail id: rajkumar.diice@gmail.com

2142

on interface level transmitter model(RTG3302-EMERSON) What is threshold valve how can we select correct threshold value T1,T2,T3,T4 When interface water & hydro carbon

2164

how to calibrate Necleuonic level transmitter.?

2114

What is the use of each wire in three wire RTD

2508

Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com

2263

1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

2606

hi i am eswar i want to know the instrumentation interview questations for eil(engineers india ltd) i have applied for engineer post in eil please help in this.my mail id eswar310@gmail.com

2571

control panel design guidelines

3403

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