A piston is said to be at top dead center...

A piston is said to be at top dead center...

Question 1 of 270705eccefa1bacbc34ba4d47350

A piston is said to be at top dead center when it is __________.

Question 1 of 27070

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Q

A piston is said to be at top dead center when it is __________.

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🔍 Key Concepts

• Piston travel in a cylinder from its lowest point to its highest point • Meaning of dead center in engine terminology • Relationship between piston position and the cylinder head

💭 Think About

• Think about what part of the engine the piston moves toward and away from as it travels up and down in the cylinder. • When the piston is at its highest possible point of travel, what is its position relative to the cylinder head? • Which options involve being closer to or farther from the cylinder head, rather than specific valve or port events that can vary with timing?

✅ Before You Answer

• Be clear on where the cylinder head is located in relation to the piston and cylinder. • Identify which choices describe a position of the piston, not an engine event (like opening or closing ports). • Ask yourself: at top dead center, is the piston at the top or bottom of its stroke relative to the cylinder head?