What distinguishes a compressor from a pump?

The distinction between a compressor and a pump is primarily based on their functions and the types of fluids they handle. A compressor is specifically designed to increase the pressure of gases by reducing their volume, making it essential in applications such as refrigeration and gas transportation. In contrast, a pump is tasked with moving liquids from one location to another, maintaining their volume and flow rather than compressing them.

B is the correct choice because it accurately describes these functions: a compressor increases gas pressure by compressing the gas, while a pump is used for the movement of liquids, which involves handling the fluid without significantly changing its volume or pressure. This fundamental difference in the operations of compressors and pumps underpins their respective applications across various engineering fields.