Proportional Band Quiz; An Example on Interview

Below is still discussion about some questions for technician or operator during their interview which was passed to me by somebody. I would like to make this issue as a discussion in my blog. The topic in this chapter is about proportional band. Proportional Band (PB) is defined the amount by which the process variable …

Flow Instrument Quiz; An Example on Interview

Somebody sent me sample of problems with multiple choice answer given by a recruiter company in Indonesia during selection to become operator and technician. I didn't make any changing on the words, terms, and sentences they used. I just copy paste and evaluate them. In my opinion all the questions were composed by experience practitioner. …

Hydraulic Cleaning Criteria; NAS 1638 & ISO 4406

Both standard codes (NAS 1638 & ISO 4406) are the main reference of hydraulic cleaning and filtering activity. People more familiar using NAS terminology because ISO just recently release similiar code to deal with hydraulic cleaning issue. How to read NAS code and How to read ISO code will be my novel topic on this discussion. NAS 1638 …

Turbulent Flow for Hydraulic Filtering

Does anybody know why pressure is not one of parameter that would give impact to reynold number calculation? I don't know exactly the answer and what the explanation is. If you read the reynold number formula you would only find that the turbulent flow is only affected by internal diameter, viscosity, and flowrate. If I imagine myself one occassion we hold …