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 green buoy has a yellow triangle on it. This is a(n)（）.
Please supply 200 tons of fresh water（）my ship.
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（）.
Permanent magnetism is caused by（）.
Permanent magnetism is found in（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
It is not necessary to declare（）in the Health List.