It was renamed Functional Discourse Grammar in the 1990s, but the theory can go by either name. This theory is called functional because it states that all constituents, whether affixes, words, phrases, or sentences, have semantic, syntactic, and pragmatic functions.he most famous of these is Systemic Functional Grammar, which was first published by British linguist Michael Halliday in 1961. Other functional grammars include Danish Functional Linguistics, lexical functional grammar, and Role and Reference Grammar.
The head of a Hemispherical combustion chamber. A hemispherical combustion chamber is a type of combustion chamber in a reciprocating internal combustion engine with a domed cylinder head. The hemispherical shape provides a number of advantages over a reverse-flow cylinder head but comes up short in others, particularly in carbureted engines.
Best Answer: c - In a combustion chamber, fuel (usually kerosene in jet engine applications) is injected into the high pressure air coming from the compressor. A flame is used to burn the resulting mix, creating a high temperature gas.