# 105

Instrument Technician interview questions shared by candidates

## Top Interview Questions

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Instrument Technician was asked...13 May 2019

### 1. Basic Instrument theorems 2. Calibration of Field process instruments ( PT, FT, DPT,LT, Analyser etc.) 3.Calibration of Fire and gas instruments( HC, H2S, Smoke, Heat etc)

Its define controlling modifying recording processes variable etc flow temperature pressure ph etc Less

Its define controlling modifying recording processes variable etc flow temperature pressure ph etc Less

### 1)how much experience do u have?

I said that I have 2 year experience

3years

I have experience 4.5 year experience in Technician

### Experience based questions

Yes

Like calibration tubosoting solution

If know minimum knowledge about it.u will be selected

### why i come to actemium company

i need to share my knowledge

I am interested this company Company name: cegelec I am very interesting this company Less

### Knowledge on PLC.

Hands on writing the ladder logic and the actual equipment and devices.

Bonjour à tous je vous remercie de me donner l'occasion de mieux m'expliquer Je suis Glenn Robinson Omouala Superviseur en Instrumentation et réparateur maintenance. j'aimerais bien faire partir de cette équipe de maintenance intégrer cette entreprise . je serais ravi de faire partie de cette coueronne équipe de maintenance et d'offrir à cette société mon savoir-faire en maintenance. Merci beaucoup à vous tous. Less

### What is the purpose of Derivative in controller tuning and what process would you use Derivative in?

To truly understand this you must understand prcoess deadtime and what, in mathematics, a derivative is. Essentialy is the instantaneous rate of change of a function with respect to time, so when evaluating what processes to apply it you have to take into account what the dead time or reaction time of the process would be. For example, ask the question what is my desired reaction given a change to setpoint. It changes depending on the process and for a conroller using a derivative function the goal is to minimize oscillation in your controller output to a "quarter wave decay". Processes that you would want to use a derivative function would be for variables like temperature that have a large deadtime and take a while to recover after a step change. Less

### How well do you work with other people at your previous companies?

Hi,, first of all team work, good relationship with our team Member, Always Follow our senior instruction, work fiendly with work partner, And Most important thing is Always Respect everyone Less

Very will. Team work is extremely important.

### if you have a pump in a run of piping a dp pressure readouts coming off the piping, one 3 floors above, one in line with the pump, and one 3 levels below, which is most accurate? Will the one above read higher, lower, or the same? What about the one below?

you have to understand and apply Bernoulli in the context of reading flow. what are you reading? static pressure? velocity pressure? the readings can be accurate at any point, but you have to adjust using textbook formulas for the changes that occur in flow both downstream and upstream of the pipe. for example, you have to either add or subtract friction loss and head loss depending on where the reading is. If you calibrate readings for such changes, then you can get accurate readings in any location. Less

most accurate: the one in line one above: lower because you are using the pump head to get the water to the detector and gravity is working against you. one below: higher because the weight of the water on top of the detector. Less

Smile &amp;try to make happy with everyone