143. As shown in the illustration, the component labeled «N» would be identified as a ________

Component N is the boiler water feed pump, as it draws condensate from the hot well and delivers feedwater to the boiler and waste-heat economizer. This function aligns with the pump's location and connections, distinguishing it from a main condensate pump (which draws from the condenser), a fuel oil service pump (associated with fuel lines), or a waste heat boiler circulating pump (part of a closed loop).