单项选择题
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 available for use on the fire main system at all times
C.no relief valves are installed
D.all of the above conditions are met
相关考题
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单项选择题
A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.
A.remain on course and hold speed
B.remain on course but slack the speed
C.change course to put the wind on either beam and increase speed
D.change course and put the stern to the wind -
单项选择题
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
A.comes over the bow
B.blows the fire back toward the vessel
C.comes over the stern
D.comes over either beam -
单项选择题
A fiber towing hawser is readied for service by（）.
A.spooling it on a winch cathead
B.coiling it in a counterclockwise direction on the fantail
C.faking it on deck in a fore and aft direction
D.spooling it on a reel lying on its side to prevent rolling
