ASE Heating and Air Conditioning Terms & Definitions Practice Test

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Catalyst
A code that represents and can be used to identify a malfunction in the computer control system.
Poppet valves in the cylinder head that control the flow of exhaust from the engine.
A compound or substance that can speed up or slow down the reaction of other substances without being consumed itself. In a catalyst converter, special materials platinum or palladium and rhodium in parentheses are used to promote combustion of an burned hydrocarbons and reduce carbon monoxide and nitrogen oxides in the exhaust gases.
A terminal that conducts an electric current into or away from the conduction part of a circuit, such as the terminal at a battery; firing terminals found in a spark plug.