Physics · IC Engines

Which of the following best explains why a simple carburetor tends to deliver a progressively richer mixture at higher air flow rates (higher throttle openings)?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The float chamber overflows due to higher suction pressure at high throttle positions.
2Air density decreases due to compressibility at high speeds while fuel density remains virtually constant.✓
3The throttle valve restricts fuel flow less than air flow at higher speeds.
4Fuel density increases while air density decreases with increasing pressure differential.

Correct answer

Air density decreases due to compressibility at high speeds while fuel density remains virtually constant.

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