The correct answer is D) propeller type. Propeller-type pumps are commonly used to transfer large quantities of fluids at relatively low pressures. They operate by using an impeller with vanes or blades that create a suction force, drawing the fluid into the pump and then pushing it out at a higher velocity. This design allows propeller pumps to move large volumes of fluid efficiently, making them well-suited for applications that require transferring substantial amounts of liquid at lower pressure requirements. The other options, such as reciprocating, screw, and gear-type pumps, are typically better suited for higher-pressure applications or for handling more viscous fluids, rather than large-volume, low-pressure fluid transfers.