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Instrumentation Interview Questions
Questions Answers Views Company eMail

can anybody tel me how a vfd or any field instrument communicates/interface with plc/scada/cs.

Honeywell,

1125

1)unmovable objects have frequency or not?if that object have frequency,how do we measure and transmit? 2)how do u measure the continuity without multimeter? 3)we put 24volt dc supply in railway track how many distance it is traveled without voltage drop?

1 1788

Consider a level troll. i am getting a correct value in 4mA and 20mA. the value in the middle(30 to 60%)is disturbed and i am not getting the appropriate value. what is the solution to normalize the level and to get the correct value..

KNPC,

2 4317

how to measure temperature from resistance of rtd?and how to measure temp from voltage of thermocouple?is there any formulas?

3 7806

WHAT IS THE DIFFERENCE BETWEEN DCS & PLC.

Reliance,

9 9351

1.what is beta in control valves? 2.what is the condition followed by light in LASERs? 3.1kg/cm2=?psi 4.Integral action reduces what? 5.about vena contracta 6.a simple RC circuit 7.thermistor material's temp coefficient of resistance 8.if wave passes through the thicker area of a chord to a thinner area what changes will occur to wavelength? 9.if 4-20 mA represents 0-10 kg/cm2 what will be the current when pressure is 5 kg/cm2.................

Lurgi,

1504

Pl send the model question paper of mahagenco account officer post

MahaGenco,

1791

if in a level tx height is given, how u calculate the ranges of the tx?

Bombay Rayon Fashions, Invensys,

2 5170

how u measure dp in dp tx? how u calibrate a dp tx?

Invensys,

3 5688

what are the problem's will accure in dcs or plc hadware and what are the solution for it?

2 3529

whey we conect ammeter in series and voltmeter in parallel in circuit

1 7159

On LPG sphere tank we used LIT for level indication.High side port is connected to the bottom of the tank while low side port connected to the top. I would like to know how to fill the glycerin on its low side with two condensing pot installed,one from top and the other one for its drain line.Please I need your expertise...thanks

1 3903

HI, can anybody give details about GAS TREATMENT PLANT CONSTRUCTION,as INSTRUMENTATION ENGINEER what are the responsibilites.what are the instruments mainly instrumentation engineer will deal with

GSM, IOCL,

1142

how magentic flow tx. vortex flow tx & ultrasonic flow tx works and its prinicle?its callibtration prosedure?

1 3076

what is dry leg and what is wet leg?

3 17112


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Un-Answered Questions { Instrumentation }

how to calculate range of level transmitter?

1278


How will you test a transistor with a multimeter?

186


Punj lloyd is coming in our Jadavpur Universtiy campus for campus placement. Please send me some hints about the writtend exam. My email id is subratafriends@gmail.com

1924


Definition of reverse and acting controllers:

1317


What is limitation of the ht.of the displacer of a level trol?

1274






Explain PID controller tuning & any one method used for it.

6150


Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

472


Explain the combusion chamber

1115


What is furnace draft control?

174


Derive capacitance to 4-20ma conversion formula / relation in capacitance type pressure sensor?

1183


please send data bank of quetions answers on analytical instrumentation.

1045


How ejector(or)evactor air pump is working in thermal power plant?

5065


which type of signal used in instrument?

7289


Can I calibrate the Electromagnetic Flow Meter on line and How.

946


what is moisture probe? What are there types? What is there working principle and how they works? guys this is one of technical question I had ask in interview. If you know its answer please let me know. The interviewers were more interested in microwave moisture probe, so if you find its any link please just forward me on my mail id.avinash1200@gmail.com Thanks in advance.

1002