Which of the following is NOT a common power source for fire pumps?

• A. Diesel engines
• B. Solar-powered pumps
• C. Electric motors
• D. Natural gas or other alternative-fuel engines

Answer: (B)

In fire pump systems, reliability and guaranteed operation during a fire drive the choice of power sources. The standard options are diesel engines, electric motors tied to a standby electrical system, and engines powered by natural gas or other alternative fuels. These sources deliver high, controllable power and operate independently of weather, ensuring the pump can start and run whenever needed.

Solar power, while used in some niche or supplemental applications, isn’t common as a primary power source for fire pumps because it depends on sunlight and requires substantial battery storage to guarantee operation around the clock, including night time or cloudy days. This variability and the added complexity and cost make solar-powered pumps rare as the default choice.