How to Build a Low Cost and Efficient Transformerless Power Supply
Capacitive power supplies are considered bad replacements for regular or SMPS transformer power supplies because they are not isolated from the AC …
Continue ReadingManufacturing of Forgings in Stainless Steels
The manufacturing of stainless steel forgings allows many components to be produced for use in various industries. There are numerous types of forging …
Continue ReadingWho Invented the Activated Sludge Process? The History of Today's Most Widely Used Biological Wastewater Treatment Process
Ardern and Lockett, who invented the activated sludge process, first used the term, activated sludge, in 1914. Their discovery of the value of …
Continue ReadingHandling of the Marine Boiler Safety Relief Valve
Safety valves are fitted to protect the boiler from the effect of over pressure. At least two safety valves are fitted to each boiler steam drum, but …
Continue ReadingPremature Failures of Rubber Engine Mounts in Heavy Duty Applications
Engine foundation design norms for rubber engine mount bushings have not been adequately considered in the most important and harshest service …
Continue ReadingThe 3208 Catepillar Marine Engine - History and Design
Although its original concept was a cheap throw-away engine, the Caterpillar 3208 engine has been used for many applications. Perhaps the most popular …
Continue ReadingHelical Compression Spring Calculations – Design, Equations & an Example
Various compression spring calculations are required now and then by engineers. This article covers five types of important helical compression spring …
Continue ReadingHow to Build a Simple FM Wireless Remote Switch
Controlling a particular electrical gadget through a wireless remote switch can be fun and also very handy. Building such an interesting project at …
Continue ReadingIs Extracting Gold from Printed Circuit Boards Possible? How is it Done?
Extracting gold from a printed circuit board can be a hectic process, but there are some methods that can be applied to remove minute quantities of …
Continue ReadingOn Board Marine Boiler Repairs
This article discusses the general repairs needed in the marine boiler and how to repair them directly on board. Some common repairs are leaking of …
Continue ReadingShale Oil Recovery Technology - Introduction - Description and Terminology
Oil shale is the name given to sedimentary rocks that contain kerogen, a solid bituminous substance which produces hydrocarbons when heated. Oil shale …
Continue ReadingThe History of Water Chlorination - A Major Public Health Advance
Preliminary use of water chlorination took place in the mid to late 1800’s. The history of water chlorination for regular disinfection of public …
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