NOCTI Outdoor Power Equipment Practice Exam

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A carburetor equipped with a fuel pump can be operated by what mechanism?

Turning it on

A vacuum

A carburetor equipped with a fuel pump operates primarily through the mechanism of a vacuum. In this setup, the engine's intake stroke creates negative pressure, or a vacuum, that assists in drawing fuel from the fuel tank into the carburetor.

The fuel pump is usually a diaphragm pump, which is activated by the engine's vacuum or by the movement of a piston within the fuel system. As the engine runs, the vacuum created by the intake manifold draws fuel into the carburetor where it can be mixed with air for combustion. This efficient use of vacuum ensures that the engine receives the appropriate amount of fuel for optimal performance.

Overall, the vacuum mechanism is essential for ensuring consistent fuel delivery, especially in various engine conditions and load scenarios, thus supporting the proper functioning of an outdoor power equipment engine.

NOCTI Outdoor Power Equipment Practice Exam

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