COMBUSTION |
|
Combustion or burning is a chemical process, an exothermic reaction between a substance (the fuel) and a gas (the oxidizer), usually O2, to release heat. In a complete combustion reaction, a compound reacts with an oxidizing element, and the products are compounds of each element in the fuel with the oxidizing element. For example:
CH4 + 2 O2 → CO2 + 2 2O + heat
CH2S + 6 F2 → CF4 + 2 HF + SF6 + heat
|
ISO 9000 |
|
ISO 9000 is an ISO standard for Quality Management Systems.
ISO 9000 was developed from the British Standards Institution's BS 5750. The ISO 9000 standard is maintained by ISO (the International Organization for Standardization) and administered by accreditation and certification bodies. It is widely used in manufacturing, although high costs and difficulties with implementation have led to many companies using alternatives such as IC9700, or IC9200, both of which are issued by the International Charter, or their own specific in-house 'standard'.
Some countries re-label ISO 9000 as a national standard. (e.g. IR 9000 in Iran).
It should be emphasised that ISO 9000 does not guarantee the quality of the end products - rather, it certifies that the correct manufacturing process is being carried out.
|
LIQUIFIED PETROLEUM GAS - LPG - LP GAS |
|
Liquified petroleum gas (also called liquefied petroleum gas, liquid petroleum gas, LPG, LP Gas, or autogas) is a mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles, and increasingly replacing chlorofluorocarbons as an aerosol propellant and a refrigerant to reduce damage to the ozone layer. Varieties of LPG bought and sold include mixes that are primarily propane, mixes that are primarily butane, and mixes including both propane and butane, depending on the seasonin winter more propane, in summer more butane. Propylene and butylenes are usually also present in small concentration. A powerful odorant, ethanethiol, is added so that leaks can be detected easily. LPG is manufactured during the refining of crude oil, or extracted from oil or gas streams as they emerge from the ground.
|
WWW - WORLD WIDE WEB |
|
The World Wide Web (WWW or simply the Web) is a global information space which people can read and write via computers connected to the Internet. The term is often mistakenly used as a synonym for the Internet itself, but the Web is actually a service that operates over the Internet, just like e-mail.
|
|
