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

Instrumentation Interview Questions

Questions Answers Views Company eMail

Somebody ask me how many size of control valve what is mean of control valve size?

2 5205

what deference between panel earth and systemearth

Tecnimont,

2332

In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.

1983

What is input and output of vaiberation transmitter and what is its unit.

SMH,

4 9335

What is input and output of plc & dcs

2 5929

What is TMR

3 10357

Where are use of pressure,level,flow switches?and what is input and output

3 7459

What is differnece between leveltroll and interface leveltrol?

2 6417

How many types of sensors are used in instrumentation & what are names

CTC,

1 4391

What types of thermocuple are mostly used?

6 10387

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

ADMA OPCO,

4046

What is the purpose of LO overhead tank in turbines.

ADMA OPCO,

1 2933

what is the usage of QDV & VOLUME BOOSTER

ADMA OPCO,

2319

what barrier is used in process industry.

ADMA OPCO, Process Industries,

3 7141

what is meant by cold junction compensation. where it is used.

SRACO,

1 6103

Post New Instrumentation Questions

Un-Answered Questions { Instrumentation }

Explain why use mmwc unit?

1056

what is the difference between attemperator and desuperheater ?

5586

why orfice is not used for main steam flow calculation

2136

Why mmwc unit is used?

1202

State four different types of flow measurement, for gas flow measurement MMSCFD is the common unit expand the unit and specify significance of word S in the unit.

2047

How to calibration a control valve?

1174

How the sizing of the analog signal cable is calculate?

2532

How is work 5/2 sov?

1889

whats the abbreviation of IOP? is it instrument of power or input open problem?

1171

Explain Gas Turbine startup and shutdown sequences

4324

what are the diff. in servo and regulatory control?

3984

Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

2303

installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

2136

Explain the difference between mmwc and mmwg?

5676

What is furnace draft control?

1094

For More Un-Answered { Instrumentation } Questions Click Here