What is a likely consequence if the pump head is not sufficient to meet system demand?

• A. The system experiences insufficient pressure.
• B. The discharge line will automatically open a relief valve.
• C. The pump will draw less current.
• D. The system will self-prime.

Answer: (A)

When the pump can’t develop enough head to meet system demand, the pressure in the system drops below what’s required. In a fire protection setup, that means the discharge pressure at sprinklers or standpipes won’t reach the needed level to push water where it’s needed, leaving parts of the system inadequately supplied. The other scenarios don’t fit this situation: a relief valve opens only when pressure is too high, not when it’s too low; self-priming is about getting the pump started rather than the steady pressure once running; and motor current isn’t a reliable indicator of insufficient head, since current varies with load and can behave unpredictably.