A double-acting cylinder will extend when oil flows into the_____.

A double-acting cylinder will extend when oil flows into the_____.

• A. Rod end
• B. Piston
• C. Cap end
• D. Rod

Answer: (C)

In a double-acting cylinder, both ends can be pressurized to move the piston in either direction. Extending the rod happens when fluid is pumped into the cap end—the end opposite the rod. The cap-end pressure pushes the piston toward the rod end, which drives the rod outward and extends the cylinder. Conversely, applying fluid to the rod end would push the piston toward the cap end, retracting the rod. The option describing the cap end aligns with this flow path, while the other ends (rod end or piston itself) aren’t the locations where fluid is introduced, so they don’t produce extension.

In a double-acting cylinder, both ends can be pressurized to move the piston in either direction. Extending the rod happens when fluid is pumped into the cap end—the end opposite the rod. The cap-end pressure pushes the piston toward the rod end, which drives the rod outward and extends the cylinder. Conversely, applying fluid to the rod end would push the piston toward the cap end, retracting the rod. The option describing the cap end aligns with this flow path, while the other ends (rod end or piston itself) aren’t the locations where fluid is introduced, so they don’t produce extension.