Throttles, chokes, dampers, and valves all restrict fluid flow. Aside from specific terminology/usage in internal combustion engines, are these really interchangeable terms, or do they have some specific meaning? Perhaps choke and throttle only apply to internal combustion engines and have no standard meaning outside that context? Damper might then be a special case of valve that applies to gases?
Dictionary definitions are not tremendously helpful. From Wiktionary:
Choke: 1. A control on a carburetor to adjust the air/fuel mixture when the engine is cold.
Throttle: 1. A valve that regulates the supply of fuel-air mixture to an internal combustion engine and thus controls its speed; a similar valve that controls the air supply to an engine.
Damper: 1. Something that damps or checks: A valve or movable plate in the flue or other part of a stove, furnace, etc., used to check or regulate the draught of air.
Valve: 1. A device that controls the flow of a gas or fluid through a pipe. 2. A device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit.