A.flame arrestor
B.flame screen
C.detonation arrestor
D.detonation blocker
您可能感興趣的試卷
你可能感興趣的試題
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 jack-up drilling rig being towed must（）.
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.
A fire pump may be used for other purposes if（）.
A fishing vessel displaying the lights shown is（）.
It is not necessary to declare（）in the Health List.
Permanent magnetism is caused by（）.
A large basin cut into the shore，closed off by a caisson，and used for dry docking of ships is known as a（）.
A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.
For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.
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（）.