A.flame arrestor
B.flame screen
C.detonation arrestor
D.detonation blocker
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A.slipway
B.graving dock
C.ground warp
D.caisson dock
A.a 2-second blast every 20 seconds
B.a 4-second blast every 20 seconds
C.an 8-second blast every 30 seconds
D.a 10-second blast every 30 seconds
A.turn off all lights that interfere with the navigation lights
B.turn on all available working lights on deck
C.ring the bell rapidly for five seconds once a minute
D.display two black diamonds in a vertical line during the day
A.Aye Aye Sir
B.Right 15 degrees rudder
C.Rudder is right 15 degrees
D.No reply is necessary，just carry out the order
A.heavy-walled drill pipe
B.tool joint
C.down hole tool
D.drill collar
最新試題
A large metallic device，mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)，designed to prevent the passage of a rapidly moving flame through the piping is called a（）.
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
Permanent magnetism is found in（）.
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.
An inert gas system installed on a tanker is designed to（）.
A safe fuel system must（）.
It is not necessary to declare（）in the Health List.
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 fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.