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The fuel injector is not used in-

  • A.Two stroke SI engine
  • B.Four stroke SI engine
  • C.Steam generator
  • D.Four stroke diesel engine

Answer: C

The key's answer is steam generator.

A fuel injector sprays fuel into the cylinder or intake of an internal combustion engine. A diesel engine depends on it, and modern SI engines, two stroke as well as four stroke, also use port or direct fuel injection in place of a carburettor.

A steam generator is a boiler, an external combustion device in which fuel is burnt in a furnace to raise steam, so it has no fuel injector of the engine kind. Older carburetted SI engines also lack injectors, but the key treats the steam generator as the device to which injectors do not belong.

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