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
您可能感興趣的試卷
你可能感興趣的試題
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
最新試題
Permanent magnetism is caused by（）.
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 heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.
A hand held instrument used to measure distances between objects and the ship is a（）.
A safe fuel system must（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
An inert gas system installed on a tanker is designed to（）.
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 fishing vessel displaying the lights shown is（）.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.