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

Instrumentation Interview Questions

Questions Answers Views Company eMail

hi... i'm about to learn siemens plc i came across following question in my mind ... plr ans 1. hw motor operated by plc 2. hw drive operated by plc explain dis by both ladder logic diagram and hardware config , connection

KCP Cements,

2 3600

What does it mean 3/2 sov

5 6687

what is use single seated and double seated valve?

Doha Petroleum Construction DOPET,

2 4713

what is the difference b/w normal thermocouple and skin type thermocouple?

Heisco,

1 3937

Why 4mA-20mA current loop selected as standard ???

IMCO, Reliance,

1 4461

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 6000

why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.

2386

how to change 4 wire rtd transmitter into a 3 wire rtd transmitter? as our transmitter is working for 4 wire rtd, what should do for working on 3 wire rtd transmitter

HHJ,

1 3746

what is the working principle of dis-placer type level transmitter

Sendan,

1 3071

What is the solution if rotork motorised control valve showing pink Colour in dcs.

Bhushan Power Steel,

3 4739

How you calibrate absolute pressure with the calibration range of 0 to 1000 0C Absolute. Please explain the procedure for calibration.

Petro Rabigh,

1709

Somebody can explain me about >Critical Loops, calibrations, ESD critical Loop checks, Logic Diagram / Cause & Effect checks for ESD loops,

1692

what is skin thermocouple?

3 4884

what type problems create in radar level transmeter and what is its solution

Essar,

2 4471

steps for installing orifice plate?

Bhushan Power Steel,

1842

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Un-Answered Questions { Instrumentation }

Sir,I am going to sit for IOCL written test exam. recently.Can anyone tell me the name of 'Objective type Question Book on Instrumentation Engineering ' which will help me. Pl. mail to bidyut_71@rediffmail.com / bidyut.saha2008@indiatimes.com / bidyut.saha09@yahoo.in

2070

What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.

2663

what is a half wave, full wave, and bridge rectifer.

1782

when a magnet is heated?

1976

what is the criteria to decide conductor size of a cable ?

1863

Explain signal isolator

1161

Why we are using reverse action in displacer types level transmitters on some Vessels?

2540

what is the responsibility of an instrument commissioning supervisor

3155

What is force balance principle?

1168

How does a single acting, spring return ball valve actually work? Does it require continuous air supply?

2137

please send the drdo exam paper

2389

In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

1823

in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?

3172

What is the differerence between hysterisis and linearity.

2317

What are different types of orifice plates? State their uses.

1149

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