A.heavy-walled drill pipe
B.tool joint
C.down hole tool
D.drill collar
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A.main brace
B.tow span
C.jockey bar
D.None of the above
A.one sidelight
B.one sidelight and a masthead light
C.one sidelight and two masthead lights
D.both sidelights of a vessel and her masthead light(s)
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
A.information or regulatory buoy that has lateral significance
B.buoy that is off-station and is marked to warn mariners of its wrong position
C.dual purpose marking used where the ICW and other waterways coincide
D.buoy that was set in error and will be replaced with a red nun buoy
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
最新試題
An inert gas system on a tanker should be used to（）.
A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.
A safe fuel system must（）.
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
It is not necessary to declare（）in MARITIME HEALTH DECLARATION.
Between 1830 hrs and 1850 hrs this day，strong gusty winds（）by my vessel，in consequence of which the vessel’s four mooring lines were broken.