Overfilling a refrigerant container is extremely dangerous because of the high pressures generated. The generation of pressure is the result of what?

Correct Answer: Option A — hydrostatic pressure of the expanding liquid

Refrigerant liquids possess high volumetric expansion coefficients with temperature. Overfilling a cylinder leaves no vapor space for expansion; as ambient temperatures rise, the incompressible liquid generates immense hydrostatic pressures, easily rupturing the vessel wall.