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Instrumentation Interview Questions
Questions Answers Views Company eMail

WE Know that different supply voltage of solenoid valve like 24,110,220 etc..how we check the solenoid supply is 24v or 220 NOTE: No specification at device.

OMV,

2 8517

In RS 500 SLC 5/03 input change one module card to another card, plz. give steps clearly.

BHL,

2116

What is capacity of impulse line tube ...answer in psi

Shell,

2 9619

Any one can help me to identified, how can we interchange the device in FF

Ion Exchange,

2165

What is the procedure of DP switch calibration 

NOCL,

2 9566

What is Cavitation?

Gujarat Borosil,

2 6855

What is Trim?

Gujarat Borosil,

1 10143

What is scan time of PLC?

Gujarat Borosil,

2 12191

What are the logic behind 2x2 and 2x3 logic and more when ask in interviews

Reliance,

1 3913

which transister (npn or pnp) is used in vibration monitoring for negative voltage? 

2 6678

What is the difference between bench set and operating range i control valve?

Descon,

1 7187

why use to 250 ohm for hart protocol and why hart communicator not communicate without 250 ohm 

OMV,

4 14289

how to calibrate TT transmitter

3 12826

What is rtd output signal

Nestle,

4 15129

How can test or measure the probe and extension cable to identify if the problem at the probe or cable or at the driver it self? (pleast notify the measuring method)

1962


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Un-Answered Questions { Instrumentation }

what are the diff. in servo and regulatory control?

3154


when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

1558


how pressure transmitter work, what is its principal to measure and how its generate signal. for pressure transmitterinstallation which precautions must be taken ??

1155


can any send me a forbes marshall dtron 316 manual

1295


Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?

1520






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?

1502


What is stripper & spilitter ? Diffrence in this.?

2312


How the sizing of the analog signal cable is calculate?

1778


If fire would be inside the plant which fire detector is to detected the fire.

931


Please send me the sample question of Instrumentation of hpcl/iocl exam. my mail id hihi_kiholo@rediffmail.com

2532


2. What is ultrasonic flowmeter?

4204


what is function of switch, and how is it work, explain with difination

1538


What is the working principle of the magnetic meter?

467


What is Predictive Maintenance

485


What are the materials available to prepare individually for competetive exams in Instrumentation field? Plz reply...

1477