2026 QUESTIONS WITH CORRECT
ANSWERS GRADED A+
>> Hydrant
Answer: Underground water supply outlet — wet barrel or dry barrel
>> Wet barrel hydrant
Answer: Has water up to the outlets at all times — used in warm climates
>> Dry barrel hydrant
Answer: Water only enters barrel when valve is opened — used in cold
climates
>> Color coding (hydrant)
Answer: NFPA 291 — indicates flow capacity
>> Blue hydrant
Answer: >1500 GPM flow — Class AA
>> Green hydrant
Answer: 1000–1499 GPM — Class A
>> Orange hydrant
Answer: 500–999 GPM — Class B
>> Red hydrant
Answer: <500 GPM — Class C
, >> Steamer connection
Answer: Large 4.5" connection on hydrant — for large pumper connections
>> Hydrant wrench
Answer: Tool used to open hydrant valve — pentagon nut wrench
>> Hydrant valve
Answer: Underground valve controlling water flow to hydrant
>> Hydrant pressure test
Answer: Static and residual pressures recorded during flow testing
>> Pitot gauge
Answer: Measures velocity pressure at hydrant outlet — used in flow testing
>> Velocity pressure
Answer: Pressure created by moving water — measured with pitot gauge
>> Static pressure
Answer: Hydrant pressure with no water flowing
>> Residual pressure
Answer: Hydrant pressure while water is flowing
>> Available flow
Answer: GPM available from hydrant at 20 PSI residual pressure
>> Water main
Answer: Underground pipe delivering water through distribution system