Which hazard is practically eliminated by the pressure-type carburetor's nozzle location?

Which hazard is practically eliminated by the pressure-type carburetor's nozzle location?

• A. Vaporization icing
• B. Detonation
• C. Pre-ignition
• D. Carb icing in intake manifold

Answer: (A)

The nozzle in a pressure-type carburetor is placed in the airstream after the air has passed through the throttle, where fuel is injected directly into a high-velocity flow. This arrangement promotes rapid atomization and vaporization of the fuel in the moving air, and it reduces the tendency for liquid fuel to condense and freeze on the throttle plate. As a result, the icing caused by fuel vaporization in the carburetor is greatly diminished, practically eliminating vaporization icing. Other hazards like detonation or pre-ignition aren’t addressed by nozzle placement, and carb icing in the intake manifold can still occur under certain conditions, but the specific icing mechanism inside the carburetor is what’s mitigated here.

The nozzle in a pressure-type carburetor is placed in the airstream after the air has passed through the throttle, where fuel is injected directly into a high-velocity flow. This arrangement promotes rapid atomization and vaporization of the fuel in the moving air, and it reduces the tendency for liquid fuel to condense and freeze on the throttle plate. As a result, the icing caused by fuel vaporization in the carburetor is greatly diminished, practically eliminating vaporization icing. Other hazards like detonation or pre-ignition aren’t addressed by nozzle placement, and carb icing in the intake manifold can still occur under certain conditions, but the specific icing mechanism inside the carburetor is what’s mitigated here.