Instrumentation Interview Questions
Questions Answers Views Company eMail

How do you measure g's?

Aramco, GNFC, HPCL, Polmon, Thermax,

5 17691

What is the meaning of the term "g force"?

Reliance, Saint Gobain, Thermax,

3 12443

What is the relationship between the universal gravitational constant (G) and the acceleration due to gravity (g)?

APPSC,

3 34749

Identify the electrical variable that is either directly or inferentially used by various instruments to determine the value of a measured variable.

4 8443

Describe how to calibrate various types of instruments and transmitters using ISA industrial consensus standard techniques.

Reliance,

4 14210

Identify and use the ANSI/ISA-S5.1 consensus industrial standard process symbols.

GAIL, Olympia,

3177

Troubleshoot to the device level basic process control systems given the Process and Instrumentation Diagram?

Chettinad, HPCL,

2 9431

Convert a pressure, level, flow, or temperature process variable value into the appropriate pneumatic or electrical value given different types of instruments.

Jindal, MCL, Thermax,

6 19758

Determine the manipulated variable, controlled variable, and the measured variable given a description of various typical industrial processes.

Honeywell,

6 39691

How to set up the various advanced process controllers, input the proper parameters, and tune those controllers given related control system information.

EID Parry,

1 5185

How the warning lamp of a charging-system is activated ?

2153

Technician A says the brake warning light is connected into both the parking and service brake systems. Technician B says the brake warning light will come ON only if the service brake system fails. Who is correct?

2 5571

If a warning lamp will operate with the ground circuit is bypassed with a jumper wire to ground, what should you check?

1614

Technician A says that a fuel tank sending unit will have a high resistance only when the tank is full. Technician B says that its resistance when the tank is full depends on whether the sending unit is designed for use with a bimetallic gauge or with a magnetic gauge. Who is correct?

3 7542

what will the sending unit in the fuel gauge utilizes?

1461


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Un-Answered Questions { Instrumentation }

A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

1778


Why trim span ? How?

1065


List three types Level Switches with their working principles

1618


can you provide me full detail about instrumentation in ONGC??

1736


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?

1626






what is the imbustion control loop

1424


How to Calibrate Flammable gas detector in field

712


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?

1529


what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

4395


How does work A temperature valve or fv control valve in process plz brief me

1909


Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...

1827


what is the procedure of O2 sensor(ABB) calibration?

1700


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?

1710


I am having a Phoenix digital to modbus converter. The o/p of the same is connected to flow computer FB407. But the digital signals are updated only after one minute in the flow computer. what may be the cause of delay in communication? Flow computer is having a scanning period of less than 1 sec.

1456


send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

1730