Identification should include

types of fuel systems
- carburetion
  - natural draft
  - updraft
  - downdraft
- fuel injection systems
  - electronic
  - mechanical
  - throttle-body injection (TBI)
  - central fuel injection (CFI)
  - port injection
  - sequential fuel injection
  - multiport fuel injection (MFI)
  - central multiport fuel injection (CMFI)
fuel delivery system components
- fuel storage tank and cap
- fuel pumps
- pressure regulator
- fuel injectors
- fuel filters
- fuel strainers
- fuel lines and fittings
- hoses
- fuel shut-off valve
- fuel manifolds
types of fuels
grades of fuels
alternative fuels (e.g., gasoline, ethanol, biodiesel, kerosene, diesel, propane, liquefied petroleum gas, natural gas)
vapor collection system
air induction systems
crankcase breathers
mufflers
emissions.

Process/Skill Questions:

What fuels are most commonly used in small engines?
What has influenced fuel usage the most, historically: technology, economics, or politics? Explain.
What are the functions of the individual components of a fuel delivery system?
How do these components work together to filter and deliver fuel?
What path does the fuel follow from the tank to the engine through each of these components?