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Hi kids, I just watched a discussion program on TV - We have this Budget Surplus, how should we spend it? It had to do with dreaming about a world as we would like it to be by 2050. Concensus - we have plenty of managers. What the world needs is leaders with some real vision. How many of our...

Hiya, Don't ever confuse mathematical theory with reality. The reality is what you are dealing with - the imperfect gas. If it is natural atmosphere it will contain moisture, as well as a mix of Nitrogen, Oxygen, and other gasses and/or pollutants. That will have pressure, density, and humidity...

Hiya, When I finished my final year at the University of Westerna Australia I took all my engineering lecture notes and used them to heat up water in our wood-fired hot water system. I then started out from scratch. What I needed to know about pumps and piping, air conditioning systems and...

Hi KenRad, Insurance is a business. Sometimes the inspectors know what's in the book, but they don't know for sure why, or if it relates to reality. So they say - just to make sure, let's make them comply with the letter of the book. It's traditional you know. I worked as a mechanical engineer...

Hi BRIS, It depends on what you mean by surge. The stress equations are based on Hooke's Law - the idea of bundles of spaghetti. When a strand gets too stressed it breaks in tension, and the camel collapses under the load of the extra straw. That's why you have to calculate your load of straw...

I know how you feel mate, Been there, done that. I have been a Project Engineer for 40 years. I needed a change - to destress. Took a Course in Certificate III Tourism Operations. Third largest industry in Australia. Now I'm looking at promoting and developping Tourism events and facilities in...

Hi whitetop, Pipe fittings Vendors have standard flanges because they need to be cast or forged, and are designed for specific pressure ratings. Air ducting is low pressure stuff - measured in mm watergauge. For the most part 6 mm plate is chosen as a minimum for dust extraction because of...

Hi vinod68, Try contacting the American Society of Heating & Ventilation engineers (ASHRAE). You can google that. Regards - Sgt John.Rz www.latviantourists.com.au Johnp.Rz http://www.mets.net.au

Hi kander, The problem with plate steel is that inclusions can be rolled into the plate causing laminations. It you attach to one surface then there might be a plane of weakness deeper within the plate. That is always a risk when welding to the surface of plate. Any test that will give you a...

Hi XISCOGUA, Where? Are you talking feed, discharge, or within the mill shell itself? Regards - John.Rz www.latviantourists.com.au Johnp.Rz http://www.mets.net.au

Hi Billgas, Suggest you talk to the Technical Department of a storage battery Vendor. I have always found this is a lot quicker than trying the internet. Regards - Sgt John.Rz www.latviantourists.com.au Johnp.Rz http://www.mets.net.au

Hi tbedford, What do you mean by "flame characteristic"? Are you talking jet shape, shock waves, chromatographic analysis, noise levels? Please be more specific - Sgt John.Rz www.latviantourists.com.au Johnp.Rz http://www.mets.net.au

Hi Jean99, You can get a copy from the ASME Library, or any good research Library, such as CSIRO Australia. Regards - John.Rz www.latviantourists.com.au Johnp.Rz http://www.mets.net.au

Hi UDP10, I would suggest you check your noise level at different speeds. If you are ventilating, why would you want to drop below low speed. If you really want to have some guidance, talk to a noise control engineer. There are a number of things which could be done (it shouldn't cost all that...

Hi patrick526, The logic of your question is a little unclear. Walls come in different types - free-standing, parts of buildings, retaining structures, fencing, and so on. I suspect you are talking about lateral restraint - i.e. what gives a free standing wall sufficient strength to resist wind...

Hi kevparker, Glad to see you are still in charge of the mathematics, and not the other way around. If the answer doesn't make sense, it usually means that some of the built-in assumptions are wrong, or some of the fudge factors have not been verified for your range of application. I suggest...

Hi hjulien, Good question. Hydrogen is an explosive gas. A crack in the brazing could have explosive results, particularly if the gas can collect in ceiling space, or other containment area such as a confined space. Check with the Fire Department, or Mines Safety Officers. Regards - Sgt Johnp...

Hi StructuralEIT, Good spotting. I think the ideas is not to get wrapped up with red tape when you are trying to help someone out of the ditch. A check on risk assessment, and personal safety would still have to be taken into consideration. Regards - Sgt Johnp www.latviantourists.com.au...

Hi Boiler8019, I believe Machinery Handbook has a fairly extensive list. For this type of enquiry it is best to get on the phone to a local Steel Supplier. They have the specifications on their PCs. That way you get the answer the same day (with a website it could take weeks for someone to...

Thanks jdonville, 1 - the core issue on this thread is addressed by the US Environmental Protection Agency, Office of Solid Waste Washington - Technical Report on the Design and Evaluation of Tailings Dams. I have the download, but lost the URL. 2 - http://tailings.info offers a number of books...