Pressure supervisory devices, whether they are on a pressure tank or dry pipe sprinkler system, send a signal when the pressure varies by ____ psi above or below the normal pressure.
10 correct answers Pressure supervisory devices, whether they are on a pressure tank or dry pipe sprinkler system, ...
NFPA 25 || with 100% Error-free Answers.
Pressure supervisory devices, whether they are on a pressure tank or dry pipe sprinkler system,
send a signal when the pressure varies by ____ psi above or below the normal pressure.
10 correct answers Pressure supervisory devices, whether they are on a pressure tank or dry pipe
sprinkler system, send a signal when the pressure varies by 10 psi above or below the normal
pressure.
Valve enclosure with a low-temperature alarm inspection correct answers Weekly during cold
weather
Valves that are secured with locks inspection correct answers Monthly
Valves that are electronically supervised inspection correct answers Quarterly
Interior of dry pipe valve inspection correct answers Annually when the trip test is conducted
Low-temperature alarms inspection correct answers Annually at the beginning of the heating
season
Interior of strainers, filters, and restricted orifices inspection correct answers Every 5 years
The full flow trip test is required correct answers 3 years
If a quick opening device is installed on a system, the trip test must be in accordance with correct
answers The manufacturer's instructions
quick opening devices shall be tested correct answers quarterly, except when a full flow trip test
is conducted
Low air pressure alarms,low-temperature alarms, and Automatic air pressure maintenance
devices are tested correct answers Anually
How often are sprinkler pipe and fittings required to be inspected from the floor level? correct
answers Anully
A building has 754 sprinklers installed. How many spare sprinklers are required? correct answers
6 (300-1000)
Early suppression fast-response sprinklers,Quick-response sprinklers,Residential sprinklers are
considered what? correct answers Fast-response sprinklers
The normal life expectancy of a gauge on a sprinkler system is between correct answers 10-15
years
, Even though the life expectancy is 10 to 15 years, gauges are required to be replaced correct
answers every 5 years or tested every 5 years
when is the main drain test correct answers annually at each water supply lead-in
In systems where the sole water supply is through a backflow preventer and/or pressure-reducing
valves, the main drain test of at least one system downstream of the device shall be conducted
correct answers on a quarterly basis
After the first sample testing of sprinklers, testing shall be repeated at _____ year intervals.
correct answers 10 year
Sprinklers installed prior to _____ shall be replaced. correct answers 1950
Sprinklers manufactured using fast-response elements that have been in service for _____ years
shall be replaced, or representative samples shall be tested and then retested at 10-year intervals.
correct answers 20 years
Dry sprinklers that have been in service for _____ years shall be replaced or representative
samples shall be tested and then retested at 10-year intervals correct answers 10 years
A main drain test shall be conducted _____ when the sole water supply is through a backflow
preventer. correct answers Quarterly
Vane-type and pressure switch-type waterflow alarm devices shall be tested ______. correct
answers Semiannually
Automatic dry systems are subject to tests for air leakage at what frequency? correct answers
every 3 years
all of the standpipe systems that are exempt from the 5-year hydrostatic test. correct answers
Manual wet standpipes that are part of a combined sprinkler/standpipe system
Automatic wet standpipes
Automatic dry standpipes
For a main drain test, more than a __% drop in full flow pressure is a critical deficiency correct
answers 10%
A standpipe system that contains water at all times best describes which type of system: correct
answers Wet. Reference NFPA 25 2017, Section 3.3.41.5.
True or False: All automatic and manual standpipes require a 5-year full flow test at system
demand. correct answers False. Reference NFPA 25 2017, Section 6.3.1.1.
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