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

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热门试题

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

单项选择题A drilling bit which is doughnut shaped to permit recovery of the center portion of the hole drilled is called a（）.

A.diverter bit
B.hole reamer
C.core bit
D.conventional bit

单项选择题A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）

A.A flashing amber light
B.A fixed red light
C.A white flag raised and lowered vertically
D.A flashing white light