A.prevent the generation of flammable or combustible gas in tanks
B.blow out cargo lines to prevent the build up of gas concentrations
C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit
D.prevent fires in the pumproom by continually displacing flammable vapors
您可能感兴趣的试卷
你可能感兴趣的试题
A.aid in the stripping and cleaning of cargo tanks
B.increase the rate of discharge of cargo
C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
D.lower the oxygen levels inside cargo tanks,making explosion nearly impossible
A.with
B.has
C.have
D.had
A.Apply ice-cold compress and renew every 4 hours
B.Commence artificial respiration immediately
C.Give enema
D.Pass catheter into bladder
A.prevent engine overheating
B.have proper air/gasoline fuel mixture ratio
C.be liquid- and vapor-tight
D.supply sufficient air to the intake manifold
A.When dead in the water,it is often difficult to find the neutral position and slight headway or sternway may result
B.When going directly from full ahead to full astern,there is complete steering control
C.When the vessel has headway and the propeller is in neutral,there is no effect on rudder control
D.When maneuvering in port,full ahead or astern power can usually be obtained without changing shaft RPM
A.annular blowout preventer
B.annulus
C.accumulator
D.automatic choke
A.flame arrestor
B.flame screen
C.detonation arrestor
D.detonation blocker
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
最新试题
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 green buoy has a yellow triangle on it. This is a(n)().
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for().
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 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().
It is not necessary to declare()in the Health List.
A large valve,usually installed above the ram preventers,that forms a seal in the annular space between the pipe and wellbore or,if no pipe is present,on the wellbore itself is called the().
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind ().
A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be().
An inert gas system installed on a tanker is designed to().