Instrumentation Interview Questions
Questions Answers Views Company eMail

How do you measure g's?

Aramco, GNFC, HPCL, Polmon, Thermax,

5 13457

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

Reliance, Saint Gobain, Thermax,

3 9818

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

APPSC,

3 32618

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

4 6260

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

Reliance,

4 11181

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

GAIL, Olympia,

2558

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

Chettinad, HPCL,

2 7627

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 15786

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

Honeywell,

6 35313

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 3917

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

1666

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 3975

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

1150

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 5782

what will the sending unit in the fuel gauge utilizes?

966


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Un-Answered Questions { Instrumentation }

why I need valve guard and whats different between guard and positioner ??

373


Decibel.

1149


please someone tell me what is function of vibration sencer and how many types and how to control viberation.please. my id is jimmykhan077@gmail.com

923


How to calibrate capillary type level transmitter

632


how to convert MA in to measuring values..and how mwasuring values into MA ?..plz ansr.i have intervw

1518






Questions on flow meters,few questions on HART protocol,

1073


What is the use of control cable?

160


What is the difference between uv and ir scanners? and what is the workig principle of both

1478


Why MUX JB's are using only Temperature Element in Fundation field bus?

996


The Design Calculation of Level Transmitter For Different Structure open & Closed Vessel, Eg. Diff. Level Tx., Capacitance For Continous Operation

1865


A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

1227


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

837


how do i tune dearator pr control valve using PID. we set the set point is 0.6kg/cm2 now i want 0.5 to 0.7kg/cm2 limits so what should i give p,i,d values. then pls explain how do set pid values for control valve tuning?

984


How to convert Differential pressure to flow in TPH

1221


For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

4416