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 fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）
A fishing vessel displaying the lights shown is（）.
A safe fuel system must（）.
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
A jack-up drilling rig being towed must（）.
An inert gas system on a tanker should be used to（）.
A hand held instrument used to measure distances between objects and the ship is a（）.
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（）.