Pump discharge classification refers to

• A. The color coding of piping
• B. The method of measuring pump efficiency
• C. The type of pump outlet connections
• D. High pressure normal pressure ultrahigh pressure

Answer: (D)

Discharge pressure classification is about the pressure range the pump’s discharge is intended to deliver. This grouping helps you match the pump to the hose and nozzle and to plan friction losses and safe operation—it's not about the color of piping, how you measure efficiency, or the fittings at the outlet. The best answer lists the actual pressure-based categories used to describe what the discharge can produce: high pressure, normal pressure, and ultrahigh pressure. This reflects how different nozzle and hose setups require different discharge pressures, rather than dealing with pipe color, efficiency testing, or outlet connections.