EVT Fire Pump Systems & Water Delivery Flashcards
6 cards from real EVT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 EVT Fire Pump Systems & Water Delivery flashcards as text
What is the rated capacity of a fire pump used to classify it under NFPA 1901 standards?
Answer: Flow at rated pressure from draft
Under NFPA 1901, fire pump rated capacity is the flow in GPM the pump can deliver from draft at rated net pump pressure.
During a fire pump annual service test, what percentage of rated capacity must the pump deliver at 150% of rated pressure?
Answer: 70%
NFPA 1911 requires the pump to deliver 70% of rated capacity at 150% of rated pressure during the annual service test.
What component prevents backflow from the tank into the pump intake when the pump is operating from a hydrant?
Answer: Tank-to-pump valve check valve
A check valve on the tank-to-pump line prevents water from back-flowing into the tank when the pump is supplied by an external source.
What is the minimum net pump pressure required for NFPA 1901 acceptance testing of a 1,000 GPM rated fire pump?
Answer: 150 PSI
NFPA 1901 requires 1,000 GPM rated pumps to deliver full capacity at a minimum of 150 PSI net pump pressure during acceptance testing.
What does a drop in fire pump discharge pressure combined with an increase in engine RPM indicate?
Answer: Cavitation or loss of prime
Rising RPM with falling pressure indicates cavitation or loss of prime, meaning the pump is not moving water effectively and may be starved of supply.
Which NFPA standard governs the in-service inspection, testing, and maintenance of fire department apparatus including pump tests?
Answer: NFPA 1911
NFPA 1911 covers the in-service inspection, testing, maintenance, and retirement of in-service automotive fire apparatus, including annual pump tests.