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Instrumentation Interview Questions
Questions Answers Views Company eMail

7. What are tri-state devices and why they are essential in a bus oriented system

1 5473

What is the loop calibration? Which instrument used to loop calibration and how?

Descon, QCon,

2 5072

1)how can calibrate temperature transmitter? 2)how can calibrate flow transmitter? 3)how can calibrate level transmitter?

ccic, Emerson, JK Pharma, NIGC, Rockwell, UltraTech,

3 48772

WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?

8 16231

WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?

Exxon Mobil, Honeywell,

23 54419

WHAT IS MEANT BY PROJECT MANAGEMENT STRATEGIES IN INSTRUMENTATION?

3551

WHAT ARE MAIN DIFFERENCE BETWEEN DCS AND SCADA?

ABB, Gold Fields, Rand Water,

7 29267

What are difference between automatic and manual control system?

5 58672

WHAT IS MEANT BY SUPERVISORY CONTROL?

3 8399

EXPLAIN PROPOTIONAL INTEGRAL DERIVATIVE CONTROL ACTION?

1 5464

EXPLAIN NETWORK COMMUNICATION ON DCS?

2078

HOW FOREIGN CONTROL SYSTEM CAN BE CONNECTED WITH DCS?

2141

why we set -10 volt in vibration sensor output,why not +10 volt

GE, Honeywell, LLM,

3 6412

what is diff between the centrifugal and reciprocating

2 6128

why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

Honeywell, TCS, TN,

19 47558


Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2100


what is the difference between -24 : +24 & 0:24 and where it use?

2076


Questions on flow meters,few questions on HART protocol,

1995


send me last 5 years questions asked in rrb chennai, for section engineer

2103


why orfice is not used for main steam flow calculation

2130


If we increase only P what will be controller action ?

2469


steps for installing orifice plate?

1848


I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?

2058


please can any one tell me clearly about pid tuning i am confusing about this .how to tune pid easly?

2247


Why trim span ? How?

1600


How flow can be measured with dp?

1138


Which language of programing is popular? how can i learn it ?

2154


please tel me the calibration of pneumatic controler.

2151


What is the difference between ff transmitter and non ff transmitter

2445


Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?

1933