In the compression ratio formula, which term represents the volume displaced by the piston as it moves within the cylinder?

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Multiple Choice

In the compression ratio formula, which term represents the volume displaced by the piston as it moves within the cylinder?

Explanation:
The volume displaced by the piston as it moves inside the cylinder is the swept volume. This is the gas volume the piston pushes through as it travels from bottom dead center to top dead center (its displacement). In the compression ratio, the swept volume is added to the clearance volume to give the total cylinder volume when the piston is at BDC, and the ratio is that total divided by the clearance volume (the space left in the cylinder at TDC). So the term you’re looking for is swept volume because it exactly represents the volume the piston moves through. Clearance volume is the small leftover space at TDC, and the other terms aren’t standard, so they don’t fit this definition.

The volume displaced by the piston as it moves inside the cylinder is the swept volume. This is the gas volume the piston pushes through as it travels from bottom dead center to top dead center (its displacement). In the compression ratio, the swept volume is added to the clearance volume to give the total cylinder volume when the piston is at BDC, and the ratio is that total divided by the clearance volume (the space left in the cylinder at TDC).

So the term you’re looking for is swept volume because it exactly represents the volume the piston moves through. Clearance volume is the small leftover space at TDC, and the other terms aren’t standard, so they don’t fit this definition.

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