When using a static body of water as your water source during fire apparatus service testing, the water surface must not be more than how many feet above the centerline of the pump intake, and the water must be at least how many feet deep?

When using a static body of water as your water source during fire apparatus service testing, the water surface must not be more than how many feet above the centerline of the pump intake, and the water must be at least how many feet deep?

• A. No more than 8 Feet above; Be at least 2 Feet deep
• B. No more than 12 Feet above; Be at least 6 Feet deep
• C. No more than 15 Feet above; Be at least 3 Feet deep
• D. No more than 10 Feet above; Be at least 4 Feet deep

Answer: (D)

When drawing from a static water source for fire apparatus service testing, the pump relies on suction to lift the water up to the intake. The suction capability is limited, so you want a predictable, primeable setup. The surface of the water must be no more than 10 feet above the centerline of the pump intake to ensure the pump can pull water without losing prime. The water also needs to be at least 4 feet deep so the suction line remains submerged, reducing the chance of air or debris entering the intake and helping prevent cavitation. Together, these limits keep the pump drawing smoothly and maintain steady flow during the test.

When drawing from a static water source for fire apparatus service testing, the pump relies on suction to lift the water up to the intake. The suction capability is limited, so you want a predictable, primeable setup. The surface of the water must be no more than 10 feet above the centerline of the pump intake to ensure the pump can pull water without losing prime. The water also needs to be at least 4 feet deep so the suction line remains submerged, reducing the chance of air or debris entering the intake and helping prevent cavitation. Together, these limits keep the pump drawing smoothly and maintain steady flow during the test.