What are the advantages of direct fuel injection over carburetor systems?

• A. Less danger of icing
• B. Higher maintenance requirements
• C. Increased engine weight
• D. Lower power output

Answer: (A)

The main idea is that icing is a major hazard in carburetor systems because the air flow through the venturi and throttle creates rapid cooling and can cause moisture to freeze in the carburetor throat. Direct fuel injection avoids this vulnerable air path by delivering fuel directly into the intake port or combustion chamber, so there’s no carburetor venturi for ice to form on. That’s why icing tendency is significantly reduced with direct injection, making it the best answer.

The other options don’t describe an inherent advantage of direct fuel injection. Maintenance levels and engine weight aren’t defining benefits, and direct injection typically offers better or equal power rather than lower power.