Physics · Engine Fuel System
Which of the following changes is observed when the idle adjustment screw in a carburetor is tightened (turned in)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It controls the fuel mixture ratios at high operating speeds.
- 2It increases the idle port area and increases the engine idle speed.
- 3It regulates only the main air intake of the engine.
- 4It decreases the idle port area and reduces the engine idle speed.✓
Correct answer
It decreases the idle port area and reduces the engine idle speed.
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