During the

question 8

Essay

During the ........stroke, both valves are closed and the piston is moving downward in the cylinder.

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Definitions:

Infiltration

The process by which water on the ground surface enters the soil, often influencing groundwater recharge and soil moisture.

Diagram

A diagram is a simplified drawing or plan that represents ideas, concepts, structures, or systems visually, often used for explanation or troubleshooting.

Aquifer

A subsurface layer of permeable rock, rock fractures, or loose materials like gravel, sand, or silt, capable of holding water from which groundwater can be drawn.

Surface Runoff

Water flow that occurs when soil is saturated or impermeable and excess water from rain, meltwater, or other sources flows over the land.