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ค้นเจอ 111 รายการ

calcium cabide

(เคมี ) CaC2. ได้จากให้ความร้อนกับสารผสมของ lime กับ coke ในเตาหลอมไฟฟ้า ใช้ทำ Acetylene gas โดยการให้เกิดปฏิกิริยากับน้ำ

Hydrocarbon

(Environmental Engineering) Any organic compound composed entirely of carbon and hydrogen. Two examples are methane gas and octane.

Photoautotrophic

(Environmental Engineering) Organisms which utilize inorganic carbon dioxide for protoplasm synthesis and light for an energy source. See autotrophic and chemoautotrophic.

Global warming

(Environmental Engineering) The long-term warming of the plant due to increases in greenhouse gases which trap reflected light preventing it from exiting to space.

acetylene generator

(การเชื่อมต่อ) ท่อหรือหลอดบรจุแก๊สเชื่อมโลหะ ซึ่งมีความอัดดันสูง ปฏิกิริยาของน้ำกับ calcium carbide เป็นตัวการทำให้เกิด acelyiene gas

Condensation

(Concrete Engineering) When a moisture laden gas comes in contact with a cooler surface a change of state from gaseous to liquid occurs.

Blowhole 2

(english) A cavity which was produced during the solidification of metal by evolved gas, which in failing to escape is held in pockets.

Vaporproof

(Concrete Engineering) A material that is totally immune to the passage of a gas under pressure. Any material that is truly vaporproof will inherently be waterproof.

Blister 2

(english) A defect in metal, on or near the surface, resulting from the expansion of gas in a subsurface zone. Very small blisters are called pinheads or pepper blisters.

Denitrification

(Environmental Engineering) The anoxic biological conversion of nitrate to nitrogen gas. It occurs naturally in surface waters low in oxygen, and it can be engineered in wastewater treatment systems.

Boil

(english) Agitation of a bath of metal caused by the liberation of a gas beneath its surface. May be deliberately induced by the addition of oxidizing material to a bath containing excess carbon. In the later case it is called a carbon boil and CO or CO2 are liberated.

Cellular Concrete

(Concrete Engineering) A lightweight product consisting of portland cement, cement-pozzolan, cement sand, lime-pozzolan, or lime-sand pastes, or pastes containing blends of these ingredients and having a homogenous void or cell structure, attained with gas forming chemicals or foaming agents. For cellular concretes, containing binder ingredients other than or in addition to portland cement, autoclave curing is usually employed.

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