The time for a cylinder to complete its extension stroke can be calculated if you know the _____.

The time for a cylinder to complete its extension stroke can be calculated if you know the _____.

• A. Stroke length and rod speed
• B. Stroke length and piston area
• C. Stroke length and flow rate
• D. Stroke length and annular

Answer: (A)

The time for a cylinder to extend depends on how far it must move and how fast it moves. If the piston travels a known stroke length at a constant speed, the time is simply the distance divided by the speed. So knowing the stroke length and the rod speed lets you compute the extension time directly: time = stroke length / rod speed. For example, a 12-inch stroke at 3 inches per second takes 4 seconds. The other pairs don’t fix time on their own. Stroke length with piston area gives swept volume, not travel time. Stroke length with flow rate would require knowing the piston area (to relate flow to speed) to get time, and the annular parameter isn’t used to determine extension time at all.

The time for a cylinder to extend depends on how far it must move and how fast it moves. If the piston travels a known stroke length at a constant speed, the time is simply the distance divided by the speed. So knowing the stroke length and the rod speed lets you compute the extension time directly: time = stroke length / rod speed. For example, a 12-inch stroke at 3 inches per second takes 4 seconds.

The other pairs don’t fix time on their own. Stroke length with piston area gives swept volume, not travel time. Stroke length with flow rate would require knowing the piston area (to relate flow to speed) to get time, and the annular parameter isn’t used to determine extension time at all.