The venturi effect in a carburetor creates a pressure difference that assists in drawing fuel from the discharge nozzle into the airstream. True or false?

• A. Cannot determine
• B. True
• C. False
• D. Not applicable

Answer: (B)

The key idea is how a venturi shapes airflow to create suction that pulls fuel into the airstream. When air is drawn through the narrow throat of the venturi, its velocity increases. According to the Bernoulli principle, this higher speed lowers the static pressure in that region. That low-pressure zone is what pulls fuel from the discharge nozzle in the carburetor into the moving airstream, where the fuel is atomized and carried toward the engine. The overall effect is a pressure difference that drives fuel flow and mixing, so the statement is true. The concept isn’t about determining or applicability in a different context; it directly reflects how the venturi-induced pressure drop entrains fuel into the air stream.