What is the formula for A.P.I. degrees used in gravity tests for fuels?

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Farm Machinery Practice Test: Fuel Supply and Cooling System — practice the complete quiz, review flashcards, or try a random question.

Fuel Supply and Cooling System topics include: Fuel supply and cooling system, forced circulation cooling system principle, cooling systems types, advantages and disadvantages. A fuel supply system in a petrol engine transfers fuel from the tank to the engine for combustion. The system includes the following components: Fuel tank, Fuel pump, Carburetor, Fuel injectors, Fuel filters, Fuel lines.  The fuel supply system can be one of the following types: Gravity system Pressure system Pump system Fuel injection system  The fuel injection system provides the correct fuel and air mixture... Show more

What is the formula for A.P.I. degrees used in gravity tests for fuels?