Which type of pump would normally be used to transfer fairly large quantities of fluids at relatively low pressures?

Correct Answer: Option D — propeller type

Propeller pumps are axial flow devices designed for high-volume, low-head applications, such as ballast or circulating water systems. Unlike positive displacement pumps, they move large quantities of fluid efficiently at low pressures by imparting kinetic energy through the propeller blades rather than trapping and squeezing the fluid.