A.small plate which fills the aperture between riveted strakes and the vessel framing
B.backing plate which is used to level the strakes while riveting，and then removed
C.internal frame to which the side shell is riveted
D.seam that is welded after riveting is completed
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A.matching pulse rates of at least 20 stations
B.an automatic on-and-off switch
C.a horizontal matching of all delayed hyperbolic signals
D.automatic signal acquisition and cycle matching
A.be a stopper
B.shorten a line
C.join lines of equal size
D.keep a line from passing through a sheave
A.there are fifteen pounds of CO2 in the container
B.the container，when full，weighs fifteen pounds
C.the pressure at the discharge nozzle is l5 psi
D.the empty container weighs fifteen pounds
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge
A.join lines of equal size
B.form a temporary eye (loop) at the end of a line
C.be a stopper
D.keep a line from fraying
最新試題
A continuous watertight bulkhead on a ship is normally also a(n)（）.
A CO2 extinguisher on a ship which has lost 10% of its charge must be（）.
A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.
A “spring line” is（）.
A ballasted vessel sinks enroute to a dry dock. Under these circumstances，the vessel’s owner can claim（）.
A “Mediterranean moor” should be used when（）.
A “bowline” is used to（）.
A “fifteen-pound” CO2 extinguisher is so called because（）.
A buoy with a composite group-flashing light indicates a(n)（）.
A chart with a natural scale of 1:160，000 is classified as a（）.