Which statement about carburetors in turbocharger installations is true?

• A. No carburetor is used; the system is fuel-injected.
• B. A carburetor is used with the turbocharger.
• C. The system uses both a carburetor and fuel injectors.
• D. A separate carburetor is required for each cylinder.

Answer: (A)

When a turbocharger boosts the intake air, fuel must be metered accurately across a wide range of pressures. A carburetor meters fuel based on airflow through a venturi at near-ambient pressure, so the metering becomes unreliable once boost is present. These varying pressures would cause unpredictable fuel delivery, risking an improper air-fuel ratio. Fuel injection, by contrast, meters fuel according to actual air mass flow and engine demand, remaining accurate under boost and at different altitudes. It also avoids the icing risks associated with carburetors. That’s why turbocharged aviation engines are typically fuel-injected rather than carbureted.

The other statements don’t fit because a turbocharged installation uses fuel injection rather than a carburetor, there isn’t a need for a separate carburetor per cylinder, and there isn’t a requirement to have both a carburetor and fuel injectors together.