A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
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A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load
A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity
A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection
A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line
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In ship construction，keel scantlings should be the greatest（）.
In ship construction，frame spacing is（）.
Cargo pump relief valves are piped to the（）.
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
Each cylinder in a two stroke cycle engine experiences combustion（）.
If the engine of a survival craft does not start，check to see（）.
Limit switches are used on which davits?（）
An example of a modern anchor which has a stock is a(n)（）.
Permission is kindly requested（）the ballast water.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.