Which component controls the entry of air into the engine during the intake stroke?

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Prepare for the Engineman EN A School Test 1. Utilize flashcards and multiple choice questions with detailed explanations to boost confidence and readiness for the test.

Multiple Choice

Which component controls the entry of air into the engine during the intake stroke?

Explanation:
During the intake stroke, air enters the cylinder through the intake valve, which opens to allow flow. The piston moving downward creates a partial vacuum, but it’s the intake valve that directly governs entry. Its opening timing is controlled by the camshaft, so the camshaft regulates when the valve opens and closes, while the valve itself is the gate that lets air in. The spark plug handles ignition, not air entry, and although the piston helps create the suction, it does not control airflow on its own.

During the intake stroke, air enters the cylinder through the intake valve, which opens to allow flow. The piston moving downward creates a partial vacuum, but it’s the intake valve that directly governs entry. Its opening timing is controlled by the camshaft, so the camshaft regulates when the valve opens and closes, while the valve itself is the gate that lets air in. The spark plug handles ignition, not air entry, and although the piston helps create the suction, it does not control airflow on its own.

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