单选题A fire pump may be used for other purposes if（）.Athe other services are run off a reducing station with a pressure gageBone of the required pumps is kept availabe for use on the fire main system at all timesCno relief valves are installedDall of the above conditions are met
单选题
A fire pump may be used for other purposes if（）.
A
the other services are run off a reducing station with a pressure gage
B
one of the required pumps is kept availabe for use on the fire main system at all times
C
no relief valves are installed
D
all of the above conditions are met
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